Arguments
Recent Comments
Prev 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 Next
Comments 9201 to 9250:
-
Philippe Chantreau at 09:12 AM on 8 November 2019Skeptical Science New Research for Week #41, 2019
mzimbal7, what "massive cold air mass" are you refering to?
The Arctic fall started quite a while ago and had time to produce cold air, which can then travel to a variety of places. How cold that air is compared to seasonal averages is another story.
The Danish Meteorological institute has sea surface temperatures, with animations:
http://ocean.dmi.dk/satellite/index.uk.php
They also have mean temperatures north of 80 degrees lattitude, with archives:
http://ocean.dmi.dk/arctic/meant80n.uk.php
The anomaly (departure from mean) is available here:
http://ocean.dmi.dk/arctic/meant80n_anomaly.uk.php
They also have a lot of information on Greenland.
NSIDC also keeps records on a variety of data on the Arctic.
NOAA has a lot of data readily available, updates, analyses, etc, here is an example:
-
scaddenp at 08:26 AM on 8 November 2019Skeptical Science New Research for Week #41, 2019
You might like to go to the thread here, read the article and tell us (on that thread) which statements you disagree with and why, preferrably references papers or data to back you position.
-
scaddenp at 08:23 AM on 8 November 2019Skeptical Science New Research for Week #41, 2019
I didnt assume - I pointed out that studies show that politics is the best predictor. It may not apply to you.
"Most of your info says the Arctic caps have melted." Point me to one place on this site where it says the arctic cap has melted. I believe that this is a strawman argument. No reasonable discussion can be had if you choose to misrepresent what is stated. The arctic caps are definitely melting. At lowest, they dropped to around 4m km2 this year, but temperatures are above freezing in high arctic for only about 50-60 days of year. The influx of warm sea water and ice transport are major factors in continuing ice lose.
Temperatures in high arctic are now more than 20C below zero so hardly surprizing it is cold. For information on what it is like in arctic in terms of temperature, seaice etc. I highly recommend the charts on https://sites.google.com/site/arcticseaicegraphs/. For why you might be getting more polar air excursions to where you live, try https://skepticalscience.com/jetstream-guide.html
-
mzimbal7 at 08:16 AM on 8 November 2019Skeptical Science New Research for Week #41, 2019
I would assume that if GW was so obvious and true - a simple common sense answer would be given. If an average intelligence person can't get a straight factual answer from the smart people, why should I change my mind? Just because someone says, "hey some experts say so, just believe them doesn't work for me" What if a president said "If you like your doctor you can keep him" - Why would I automatically trust him. Smart, powerful people can lie too. Proof is in the pudding. BTW - I'm a Libertarian. Nuetral minded. That is why I want facts, not experts opinions that contradict facts, common sense, and laws of nature.
Moderator Response:[DB] Again, politics are off-topic and contrary to this site's Comments Policy.
Please note that posting comments here at SkS is a privilege, not a right. This privilege can be rescinded if the posting individual treats adherence to the Comments Policy as optional, rather than the mandatory condition of participating in this online forum.
Please take the time to review the policy and ensure future comments are in full compliance with it. Thanks for your understanding and compliance in this matter.
-
mzimbal7 at 06:47 AM on 8 November 2019Skeptical Science New Research for Week #41, 2019
Why would you assume politics are forming my opinion? My is formed by common sense and the laws of science. You talk relatives term "colder in the Arctic than here in U.S.". I know what temp water freezes at. Most of your info says the Arctic caps have melted. So I would at least assume the air mass would be 32 degrees or higher. Should actually be much higher if its so far above normal up there over this past summer and fall. I won't do what most GW do, that is to just take it by faith. Most GW people take it by faith "by what some scientist say". The facts and common sense don't line up in their favor, so they must do this. I think an assumption you make is correct. Most Liberal minded people automatically accept the view of GW. Fits the agenda of the left. Again, please explain Thermodynamics and how something at least 32 degrees can cause a massive Cold Air mass to set up, expecially so early in the season. The exact opposite shouls occur logically. HOT doesn't produce COLD.
Moderator Response:[DB] Please refrain from making political statements, per this site's Comments Policy.
-
scaddenp at 06:32 AM on 8 November 2019Skeptical Science New Research for Week #41, 2019
Being very "warm" in the Arctic, means it is much warmer than the long term average. In some cases, annual average is 3-4C above normal. (If that doesnt sound much, that is like the temperature difference between New York and Memphis). However, while -6C is definitely warmer than -9C, it is still freaking cold. Anything coming out of the Arctic is much colder than air below it. Perhaps it would be better if you told us what informs your opinion that "there is no man made Global Warming"?
Studies show that political beliefs are best predictor of peoples attitudes on climate change which is mind-boggling if you think about it. Facts dont matter? However, from experience here, if accepting the science around climate change is offensive to your political and tribal values, then no facts or studies are going to change your mind. If you want to embrace critical thinking instead motivated reasoning, think what information/developments would cause you to change your mind. Please dont insist on something that science says is impossible (like temperature rising uniformly with CO2 concentration). It seems that for most people however, opinions are formed by "my tribe doesnt go for that" followed by uncritically swallowing misinformation to helps them justify that claim. Fortunately, science doesnt work like that.
-
mzimbal7 at 05:05 AM on 8 November 2019Skeptical Science New Research for Week #41, 2019
Did all that. Hopefully someone can give a simple factual response. I know if I turn on my stove burner and let it run for 10 minutes on high, then turn it off, and tell you to put your hand on it immediately and tell you its cold 2 seconds after. You won't do it. See, laws of scince apply. Thermodynamics.
-
mzimbal7 at 03:45 AM on 8 November 2019Skeptical Science New Research for Week #41, 2019
I am just a average intelligence guy but am a voter and being such I would like to know why I should change my view that "there is no man made Global Warming". I need facts and process on how its possible - not "we said so" or need need to "believe by faith". I think if something is warming - like the seas and land it makes things around them warmer - NOT MUCH COLDER. Explain to me how 2 extemely cold Polar Vortexes, back to back can set up so early in the season. Since they are coming out of the Arctic region, and Ive been tol how hot it is up there this summer and fall, how can it drop down cold air into the U.S. I was excited when I heard we were getting these dropping down as I thought we would warm up from all that warm air up there. How can something hot make it REALLY COLD?
Moderator Response:[DB] Welcome to Skeptical Science. As a first step, read the Newcomers, Start Here page. Then read The Big Picture page. Then, if you still have questions, use the Search function in the Upper Left portion of each page to find the most appropriate thread (read the thread first to ensure your questions are not already answered in it or in the comments section underneath). Thousands of threads exist here.
-
mzimbal7 at 03:39 AM on 8 November 2019Skeptical Science New Research for Week #41, 2019
As this is your first post, Skeptical Science respectfully reminds you to please follow our comments policy. Thank You!
-
Alan Lowey at 03:02 AM on 8 November 2019Skeptical Science New Research for Week #41, 2019
The 'contact form' link didn't work for me to inform Skeptical Science of an important research article in Nov4th edition of Nature Astronomy which states that the Universe is now considered to be a hypersphere as opposed to being flat. This is very relevant to climate science because new physics could prevail from this important new finding. New physics equals new theories on gravity which is extremely relevant to human scale tidal effects.
Moderator Response:[DB] If you feel that such an article merits the consideration of others here then the onus is on you to provide a link citation and a synopsis of why you feel it's relevant to the conversation and worthy of the time of others here.
-
Alan Lowey at 02:00 AM on 8 November 2019It's a 1500 year cycle
Thank you for the response Eclectic.
I don't agree with your statement "Tidal energy (lithosphere and oceans) dissipated into heat..", I'm talking about the energy required to move an ocean of water is greater than the energy of the sun's irradiance. Simple kinetic energy that moves an entire ocean is orders of magnitude greater than the sun's heat we receive. Surely?
Moderator Response:[DB] Part of what makes this site a treasure for most is the reliance upon using credible evidence to support one's claims. For credibility, you will have to do that. Citations to the primary literature work best, either via direct link to the URL or by providing the DOI of the published research and the name of the source article you feel supports your contentions.
-
Kuidaskassikaeb at 01:44 AM on 8 November 2019Skeptical Science New Research for Week #44, 2019
I try to talk about global warming with people, but I tend to scream and throw things. I don't think I change very many minds.
One problem is that mainstream media doesn't cover it, and the deniers are full of shallow false information.
-
Eclectic at 01:33 AM on 8 November 2019It's a 1500 year cycle
Alan Lowey @28 ,
the sun's energy absorbed by the Earth is approx 1.1x10^17 watts (based on TSI times 71% absorption times Earth-cross-sectional area).
Tidal energy (lithosphere and oceans) dissipated into heat, is calculated (Na & Lee, 2014 ) as approx 3.5x10^12 watts. So roughly the same as world total electrical generated power. And roughly a third of the heat generated by the radioactivity of the Earth's core. And roughly 1/30,000 th of the solar radiational heat absorbed by the earth's surface.
The core heat rising to the surface is so tiny (for climate calculations) that it is usually ignored. And the ocean tide heating effect is even smaller than the core heat loss.
I do not understand how you can say: "tides dissipating heat ... is much greater than solar radiance combined with AGW." You seem to have gotten that back to front. Or were you meaning a comparison with that fraction of extra heating produced through the greenhouse action of human-caused CO2/methane/etcetera? Yet even there, your "tidal" heat is at least a couple of orders of magnitude too small.
-
deucarra at 21:12 PM on 7 November 2019It's the sun
As a person concerned about the climatic issue I am trying to understand all the arguments, however this graphic baffles me. Going to the physical foundations of the graph, the temperature is an indicator of the accumulated heat, while solar irradiation is a flow, and by therefore, a contribution of heat. So I don't see any point in looking for a correlation between the two variables (it would be like comparing speed with position). I think that the correlation between temperature variation and irradiation would be more interesting, and that is when these variables not only do not move in opposite directions but do so in parallel.
-
Alan Lowey at 20:28 PM on 7 November 2019It's a 1500 year cycle
I'm NOT a climate change denier NOR an AGW denier but wish to express the logical conclusion that BOTH the 1470-year cycle AND man-made greenhouse gas emissions could be the drivers of modern era warming. I take Prof Brian Cox's point of view : The Issue With Climate Change, South China Morning Post, 23rd May 2019. He talks about the framework of science being our best understanding of how the world works. The quantitative amount of energy from gravity via the coriolis effect and via the Moon's gravitational interaction across the entire planet's body giving rise to the enormous power of ocean tides dissipating heat from the equator to the higher latitudes, is much greater than solar radiance combined with AGW. Why are these two driving forces of our climate not quantively compared? Why is gravity missing from the Global Warming Debate?
I'd be surprised if there's a single scientist in the IPCC that actually knows the ocean tides move due to the flexing of the Earth's lithosphere. The oceans move due to being pushed from the ocean floor. Nobody is measuring the mid-ocean to see whether deep ocean tidal mixing is making it cooler, for example.
People like Prof Brian Cox should also inform the public that gravity itself is under scrutiny within the physics community and that it's possible for new physics to have a major bearing on future climate modeling.
-
scaddenp at 12:55 PM on 7 November 2019It's the sun
socialfox - estimates of climate sensitivity seek to answer what would the change of temperature for a given effective increase in radiation at TOA. Changes in GHG concentration, albedo are back-calculated to an effective change in TOA radiation. ie. As if the incoming solar radiation was changing. The direct contribution to radiative flux from a change in GHG is a known quantity (~4W/m2 for a doubling, which falls out the Radiative Transfer Equations and has been empirically verified in various ways). It is not something deduced from the temperature response, but resultant feedbacks (water vapour, albedo, cloud cover) that contribute to actual change in temperature are not well known and hence the wide range of estimates for climate sensitivity. Climate sensitivity is estimated from a variety of methods including paleoclimate and models.
Note that models do not assume a climate sensitivity - it is an emergent property from the model so I dont see the circularity.
-
socialfox at 12:03 PM on 7 November 2019It's the sun
Hi! As mathematician I can't help but wonder about one thing. In advanced section, you compute the possible range of solar contribution to global warming. To do that you use previously computed values for temperature increase for doubling CO_2 (through senstitivity etc). Basically, to compute solar contribution you use computed CO_2 contribution. So the logic goes: if CO_2 contribution is computed correctly, than solar contribution right now is not big enough to explain the current global warming. What I see here is circular logic.
I would imagine, you want your argument to go something like this: suppose CO_2 contribution is low, then solar contribution is low (in particular, it may not fit the data we have for before 1950s).
Please correct me if I understood what is going on wrong.
-
scaddenp at 09:39 AM on 7 November 2019In 1982, Exxon accurately predicted global warming
Grant777 - as soon as students are equipped to do so, then they should be looking the primary source (peer-reviewed scientific papers), not what article or editorials skew for political purposes. Applies to most science reporting on media (ie much of it is junk). If you do not have the scientific background to follow the science, then students (and politicians) should be guided by the scientitic consensus, especially when it is strong. The consensus is not always right but it is the only rational basis for decision making. A scientific concensus will only altered by peer-reviewed scientific papers that present a better model, not by political hacks fighting for a tribally-based position, nor misinformation from vested groups. Climate science is fortunate to have an expert panel (IPCC) presenting reviews of the published science every view years. There is an entire chapter on evaluation of models which makes better reading than uninformed comment or delibrate misinformation.
-
Doug Bostrom at 09:06 AM on 7 November 2019Skeptical Science New Research for Week #44, 2019
Per Williimam, so in a way the various interests behind Trump's putting his thumb on the scale are choosing to die off like dinosaurs, stubbornly sticking with a doomed ecosystem?
The trouble is we have so little time available. I suppose the retro-energy industry understands this. Any delay means they have a little more space to monetize in an increasing frenzy while the going is still good. To a paranoid mind this would help to explain active attempts to degrade efficiency standards; maximize consumption while it's still possible.
We can probably count on the race backward ending up crashing prices on fossil fuels as producers act in their own interest in a panic even as demand levels off or slumps, meaning that for investors not wedded to combustion there may be better places to put money.
-
nyood at 07:02 AM on 7 November 2019CO2 was higher in the past
I want to subsequently deliver a source that confirms what i said with: "Snow will not accumulate ice sheets on the sea" and therefore is crucial to my theory:
To not falsify anything with my own translation, i google translated this middle part:
"Ice ages seem to occur only when there is a larger land mass at least at one geographic pole. Snow has to lie on the continents and not fall into the water, so that a snowpack can form in relatively high latitudes and ice can form over time. Once this is the case, positive ice-albedo feedback occurs due to the high positive albedo values of snow and ice, and further cooling occurs."
Moderator Response:[DB] As land-based ice sheets grow (due to snowfall gains in their expanded accumulation zones), sea levels fall. Land-based ice flows towards the continental edges and extends out over the ocean in the form of ice shelves. Where sea ice forms next to the ice shelves, snow accumulates, both on the ice sheets, the ice shelves and on sea ice. This point of argumentation is not germane to the topic of this post. Please stay on-topic.
Note that a website by itself is not considered part of the primary literature, especially if it does not belong to a primary producer of research information, such as NOAA, NASA or the like.
-
baeb at 06:38 AM on 7 November 2019A brief guide to the impacts of climate change on food production
There are a number of climate change food problems that are understated in the above. The first is that all plants and domestic animals have an optimal air temperature range and conditions warmer or colder where they don't thrive, struggle, or die. Chickens for example don't lay eggs if it is too hot and cattle need more water. Common food plants typically prefer temperatures in the 60s, 70s, sometimes 80s F and typically don't grow, struggle or die much above 90F. Nitrogen in plants and in soil experiences additional problems above 95F with pollen failing in the 90's and most proteins and plant hormones in the low 100s. Few food plants do anything above 105. By my count, 61% of 38 common supermarket veggies stop growing above 75F and 44% of 54 less common ones. 83% stop growing below 90F, 60%of less common ones below 90F. 60% of common grains do also as do 50% of 6 vegetable oil plants. So the problem isn't just that a farmer's fruit or vegetable mix must change as things warm. It is also that nothing much grows when it gets too hot.
-
Grant777 at 06:23 AM on 7 November 2019In 1982, Exxon accurately predicted global warming
MsGteacher,
I believe it's important for students to see how both sides of politics to skew data in their favorable conclusions. I love how you want them to think in a socratic oriented way. "Reading between the lines" is an important characteristic to develop at their age. It's easy assume in modern times that our civilization has all the answers. This new generation is exposed to many characteristics of instant gratifications - technology that provides instant feedback at a touch of a figure, etc... Its easy for young minds to see a problem and instantly want solutions to said problem. But what if we don't have all the answers? It is evident from previous climate models that durastic overestimates of environmental destruction took place, but getting them to think critically to why that was the case, would be a great take away. Why were the predictions in "The Inconvienant Truth" so far off from what we see approaching year 2020?
The basic knowledge of a high school student can easily look into the science of the molecule CO2, the positive feedback loops within the carbon cycle, and so on to result in a cynical veiw of Anthropogenic influences of Global Warming; although there are many things left out of standard text books. In pyschology, its learned that people in general feed on a negative situation 2x greater than a positive one. So thinking into the individuals studying climate change - an extremely complex system, one could see how derived parameters within a climate model might favor positive feedback loop characteristics over unknown or unpredictable negative feedback loops that would counterreact human influences over time.
Why were previous climate models overestimated? Precisely from human induced illogical assumptions in future outlook. What parameters did they miss to make them so durastically wrong?
Possibly increases to carbon sinks? https://www.nasa.gov/feature/goddard/2016/carbon-dioxide-fertilization-greening-earth
Creating an environment more favorable to organisms like Diatom? https://sciencing.com/diatom-ecosystem-5157.html
Also, solutions to "aid" our influences on our climate should be socratically reviewed. It'd be a good exercise with your students to do the same study I did for a college presentation on whether EV's are as eco-friendly as their advertisements want you to believe. You can go to Tesla or other Ev's sites and find their car's Voltage/mile ratings, while taking your state's annual energy CO2 emissions / voltage produced from EIA.gov and compare it with some of the best hybrid model ICE cars. You'll find for states like West Virginia, driving a Tesla or any EV for that matter produces more CO2 than even a car getting 30 mpg. And that CO2 is all being released in one area at the power plant - easily escapable to the atmosphere instead of while driving an internal combustion engine in nature etc where CO2 sinks could readily soak it in. Also I discovered these inaccuracies without taking into account the amount of power lost in resistors over time when transferring electricity a great distance.
It makes it evident to me that people like jumping to a solution without vetting it properly. Really, it comes down to using peoples' fear in a topic like AGW for government subsities in one's new business venture. Its a good eye opener to the world. I hope this might help.
Moderator Response:[DB] Off-topic and sloganeering snipped. "Models are unreliable" is best discussed on this thread. A discussion of the merits and flaws surrounding "Inconvenient Truth" is best done here.
-
nyood at 04:18 AM on 7 November 2019CO2 was higher in the past
@MA Rodger
(1a) "To present a value for CO2 forcing without providing evidential support is not axiomatic,
either in the sense of it being self-evident or (probably in the sense you intend) unquestioningly-evident.
The evidence can be presented should you so wish and, uncontroversially beyond-question, it is correct.You yourself present @92 an unsupported evaluation of CO2 forcing, providing a maximum value which appears novel and controversial in the extreme.
You fail to present any evidential support which in the circumstance is turning this discussion into a pantomime.
Perhaps you could correct the untenable postion you create for yourself by providing that missing evidence."(1a) The evidence that i imagine you would provide, will all result in the question: What is missing? This is manifested in the fact that you will get no exact value for CO2 sensitivity, despite known elemental spectral laws regarding infrared absorption. In other words: We are still estimating with 1,5°C - 4,5°C per doubling (?).
The theory that CO2 reaches a "saturation" already, is just the most likely aproach to me. However the forcings of HHE/LPC could be even that strong
that they shrink down all other factors making them neglectable, not "needing" any other explanation to temperature.The major evidence i can deliver here is the fact that the so called saturation for each GHG is one of the known unkwons and that there are countless debates
on this issue, underlining how unsolved this whole matter is."(1b) Your confused statements regarding HHE/LPC appear to contrdict the geographical situation as commonly understood,
in that the "Land mass" Gondwawa sits static over the "Polar Circle" throughtout this period.
You need to consider how it is your LPC appears then disappears within this period when the contition you say causes LPC remains unchanging?"(1b) I see no contradiction, in my former post i gave you the 2 links with the continental distribution, matching my theory.(Ordovizium, Silur)
I see what you are getting at though wih Schwanck slide 11: The pictures with the "paleo glacial reconstruction". They use a static continental distribution here. It is more likely that the continents were merging towards the hirnation. In a larger perspective the continents definetly move towards the pole, documented by the ordovician with the silurian as a whole. The ice needs to build up and the Boda event interrupted the glaciation process by reducing ice albedo.
"(2) Your cut-&-paste from the Schwark & Bauersachs slides appears particularly inept as support for your assertion "in fact it doubts CO2 as a driver."
If you, for instance, examine Slide 11 you will see your assertion is fundamentally contradicted."What is contradicted here? Slide 11 shows the Boda event and its CO2 emissions, the CO2 does not matter to me, regarding temperature, the factors that matter are albedo reducing ashes and dust.
If you are refering to this sentence on page 11: "atmospheric emission of large amounts of CO2 and subsequent climate warming, and.."
Then i can only tell you that Schwarck et.al are using the neglectable CO2 sensitivity axiomata here. The reason why the Katian doubts ´CO2 as a driver´ is because it marks, with all other epoches preceeding the LPC event, the time where CO2 fails to work as assumed. Where should it show its significant forcing if not here?
"(3) Here you really do dip into uncomprehensibility. Do note that the Schwark & Bauersachs slides do not ever say CO2
dropped to present atmospheric levels 400-odd million years ago.
The statement you misread from Slide 23 says purely that CO2 varied "between 8-16 x PAL and near PAL."
The value 1500ppm can be taken from their Slide 11."(3) Well, it does not matter to me, if you want it can be 1500ppm, i would not consider that close to PAL though. PAL would just makes sense to me since the ordovician
is compareable to all other LPC events.
Near Pal makes sense to me because it would reach common glacial CO2 levels. I have not enough knowledge of solubility.
Near Pal is enough for me to support the theory when it comes to: All equilibrium events and the transitions inbetween happen in the same fashion, despite varying CO levels.
"(4) If it is not land at the polar circle that creates your LPC condition; if it is ice-covered land,
you do then reqire to explain the forcing that allows the growth/shrinkage of that ice.
And in doing so, your theory now lacking the tectonic element, do consider that you are now describing a climate feedback not a climate forcing."The factor that you are missing here is indeed a fundamental one. It is the fact that snow will not accumulate ice sheets on the sea.
The double proof for this is the arctic sea, with Greenland within the polar circle.In fact with your misunderstanding here it makes me wonder if continental drift as a time dependet factor is included in the prognostications and not only be representd by the, in itself correctly implemented, ice albedo.
In other words:Fundamently excluding a long term factor of warming.
Moderator Response:[DB] The topic of this post is the skeptic claim that "CO2 was higher in the past" (which says nothing about why CO2 levels are high today). It is not about climate sensitivity or CO2 levels being saturated. Further, you really need to start citing credible sources appearing in the peer-reviewed literature to support your claims. This is not optional.
Simply making things up based on your lack of understanding of the topic means that you pre-concede the scientific portion of the discussion and tacitly admit that you are just venturing your opinions on a topic that you demonstrably lack understanding of and that you have not read the threads on the topics on question.
Off-topic and sloganeering again snipped. Those wishing to respond to those snipped points, please do so at a more appropriate thread and link back here. -
william5331 at 04:13 AM on 7 November 2019Skeptical Science New Research for Week #44, 2019
It looks reasonably likely that the USA will meet her climate commitments despite trump. Economics is the kicker. It appears that it is now less expensive to build and operate a wind turbine or solar panels than to operate existing coal fired power stations. Add to this that as you build turbine after turbine or install solar panels they immediately go into operation. No wait until the whole plant is finished. And many states are going it alone. Trump is a temporary blip in a process that is inevitable now. We might just stop the ship before it hits the iceburg.
-
michael sweet at 03:22 AM on 7 November 2019Water vapor is the most powerful greenhouse gas
Ritchieb,
Your description is similar to my understanding of the greenhouse effect.
-
richieb1234 at 01:04 AM on 7 November 2019Water vapor is the most powerful greenhouse gas
I am on a steep learning curve about global warming and would appreciate some responses to my question regarding the impact of water vapor.
There is a view among many analysts that global warming is a top-down phenomenon. The heat loss to the universe is determined by the spectrum of infrared at the top of the troposphere. The temperature at Earth's surface is then determined by the convection and radiation heat transfer needed to establish an adiabatic lapse rate.
This may seem counterintuitive; like the tail wagging the dog. But it makes sense to me. The analogy I make is the way power is often controlled in a nuclear electric plant. Rather than withdrawing control rods to increase power and thereby produce more steam; what actually is done is to demand more steam, which lowers reactor temperature and produces more power. The tail wags the dog.
What this top-down perspective does is reduce our view of the importance of water vapor, because there is much less vapor at the top of the troposphere. This is illustrated by figure 2.5 on page 23 of Houghton. "Global Warming, the complete briefing." There is also a good diiscussion at BarrettBellamyClimate. com, "Emissions to Space."
I would appreciate feedback on my interpretation of this phenomenon. Thanks in advance. --RichieB
-
nigelj at 05:31 AM on 6 November 2019CSLDF: Here’s How Science Has Suffered During the First 1,000 Days of Trump
William @4, yes many in America are science deniers, but those that want to do science will still do science, so it probably doesn't matter, and everyone benefits even in their science denialism. This is of course a huge double standard.
The problem is when the government itself turns into a science denier and stops funding science or vilifies science so much nobody wants it as a career, and this is where the Trump Administration is heading in all its profound idiocy.
-
Joe342114 at 05:10 AM on 6 November 2019Climate Science Denial Explained
Has the following skeptical blog resourse been added to the misinforming list?
https://realclimatescience.com/ -
Doug Bostrom at 04:21 AM on 6 November 2019Ynyslas, western Wales – a place made by climate change
Had an all-too-brief tour of the forest conducted by John, on an all-round brilliant day concluded by a visit with John's super social circle, in an exceptionally nice pub garden. A great memory. :-)
(too much ale and not enough clock made for a interesting double-step march to the train station)
It's easy to see why somebody would stick like glue to that bit of the world.
-
william5331 at 04:19 AM on 6 November 2019CSLDF: Here’s How Science Has Suffered During the First 1,000 Days of Trump
It's odd. America is the leader in many fields of technology and science and yet has a large portion of it's population and a significant proportion of it's politicians who are science deniers. I wonder how long her pre-eminent position can last under such conditions.
-
Eclectic at 00:17 AM on 6 November 2019CO2 lags temperature
Szponiasty , your comment sounds a bit jumbled. Perhaps it has been distorted and sabotaged by cosmic conspiracists? :D
Try again, but more clearly!! (And perhaps you are in the wrong thread?)
-
szponiasty at 23:50 PM on 5 November 2019CO2 lags temperature
So basically you are admitting, that there is influence on earth by the cosmos after all? "Several factors have affected past climate change, including solar variability, volcanic activity and changes in the composition of the atmosphere." yet you have on the "conspiracy theories" meter on the left most of them proven even by you facts? :D
Moderator Response:[DB] You are off-topic. Cosmic Rays, The Sun, Volcanoes and Trace Gas, etc all have their own threads here examining what the actual science has to say about each. The Search function will find hundreds more.
Regulars here have many years of experience and education in these topics, so you will need to read every thread and the comments on them before commenting.
-
MA Rodger at 19:15 PM on 5 November 2019CO2 was higher in the past
nyood @92,
(1a) To present a value for CO2 forcing without providing evidential support is not axiomatic, either in the sense of it being self-evident or (probably in the sense you intend) unquestioningly-evident. The evidence can be presented should you so wish and, uncontroversially beyond-question, it is correct.
You yourself present @92 an unsupported evaluation of CO2 forcing, providing a maximum value which appears novel and controversial in the extreme. You fail to present any evidential support which in the circumstance is turning this discussion into a pantomime. Perhaps you could correct the untenable postion you create for yourself by providing that missing evidence.
(1b) Your confused statements regarding HHE/LPC appear to contrdict the geographical situation as commonly understood, in that the "Land mass" Gondwawa sits static over the "Polar Circle" throughtout this period. You need to consider how it is your LPC appears then disappears within this period when the contition you say causes LPC remains unchanging?
(2) Your cut-&-paste from the Schwark & Bauersachs slides appears particularly inept as support for your assertion "in fact it doubts CO2 as a driver." If you, for instance, examine Slide 11 you will see your assertion is fundamentally contradicted.
(3) Here you really do dip into uncomprehensibility. Do note that the Schwark & Bauersachs slides do not ever say CO2 dropped to present atmospheric levels 400-odd million years ago. The statement you misread from Slide 23 says purely that CO2 varied "between 8-16 x PAL and near PAL." The value 1500ppm can be taken from their Slide 11.
(4) If it is not land at the polar circle that creates your LPC condition; if it is ice-covered land, you do then reqire to explain the forcing that allows the growth/shrinkage of that ice. And in doing so, your theory now lacking the tectonic element, do consider that you are now describing a climate feedback not a climate forcing.
-
Eclectic at 12:10 PM on 5 November 2019CO2 was higher in the past
Nyood ,
continuing with my itemized points of post #90 and your itemized replies in post #92 (subsection) :-
(A) Your quote: <" ... can not apply CO2 with a clear value (uncertainty)">
Here, too much is lost in translation. You will need to make a re-translation of your idea into English, to achieve a meaningful statement. Secondly: "Saturation" is invalid, and "Lindzen" is (often) invalid.
(B) <"(B) same as (A)"> does not make sense as a reply.
(C) <"observational evidence support my theory today"> Yes, but only in part. The full picture of observational evidence (on CO2 greenhouse) renders your theory invalid [ungueltig].
(D) Geological evidence supports your theory only in part. The full picture of geological evidence renders your theory invalid.
Nyood ,
in my post #90 , the final and most important question (for you) was: "why do you choose to ignore evidence?" Note the word choose [waehlen].
You have not answered that question. Please do so, carefully and thoughtfully. It requires using insight [Einblick; Selbstverstaendnis].
-
Philippe Chantreau at 10:04 AM on 5 November 2019CO2 was higher in the past
Nyood: "I state that CO2 forcing is max 1°C, reaching saturation with roughly PAL levels, pretty much always or already."
Earlier you said "The total climate forcing from 6000ppm CO2 is very roughly 40Wm^-2"
That would suggest then that a 40w/sq.m forcing would produce only a 1 deg C change? What published work is this based on? How did you get the 40 W/sq.m value?
What is your basis for claiming "reaching saturation with roughly PAL levels, pretty much always or already."
Current forcings are calculated from radiative physics, Iacono and Clough, and many others have worked on that. So what do you mean by "CO2 forcings as assumed (too high)"? AFAIK, these forcings are not assumed, they are calculated on the basis of the physical properties of the gas.
Moderator Response:[PS] "And these forcings are not assumed, they are calculated". And directly observed https://www.nature.com/articles/nature14240. ie observations match theory. By contrast we are seeing wild claims from Nyood with no supporting evidence.
Argument about CO2 saturation belong in this thread. If nyood wants to make that claim, then present the evidence in that thread please.
-
Doug Bostrom at 06:30 AM on 5 November 2019CSLDF: Here’s How Science Has Suffered During the First 1,000 Days of Trump
Thanks, jabell. I think we need to hire you! ("hire" not implying actual salary :-) )
-
nyood at 05:28 AM on 5 November 2019CO2 was higher in the past
"(1) The total climate forcing from 6000ppm CO2 is very roughly 40Wm^-2. There is no evidence
to suggest that climate was impacted by such forcings (from any source) during the Ordovician."(1) The first sentence is axiomaticly using an estimated forcing of CO2 and therefore is a statement, though the consequences you state are true (none).
I state that CO2 forcing is max 1°C, reaching saturation with roughly PAL levels, pretty much always or already.The Second sentence is true, the forcings that Do determine climate Temperature (T) are the two equilibrium forces
hothouse effect (HHE) and high landmass ratio within polar circles (LPC).
The faint sun paradox (FSP) underlines the strength and dominance of the terrestial forcings by allowing
the orrdovician-silurian events, HHE - LPC - HHE, to happen within the same T amplitude of all compareable HHE and LPC events untill today.
Neglecting CO2 and reducing the FPS or -4% TPI, in its forcings.On top of that you devaluate some of your own arguments brought up in the coming sections. According to (1) you do not allow yourself any comparison from there on.
"(2) According to your cited reference (slides 11 & 14), the period with elevated CO2 significantly above 4000ppm
coincides with the Katian, a period of warming."(2)This sentence has no expressiveness. HHE is happening anyways before and after the LPC.
The Katian documents the late transition state towards an LPC, in fact it doubts CO2 as a driver.
The discrepancy between assumed CO2 forcing and T is underlined by the general high CO2 level in the atmosphere, the planet will reach a glaciation from here on, to develop extreme ice shields despite CO2 levels this high. The FPS is solved as mentioned.
Furthermore forces mentioned in the Schwarck study explain the Katian warming already:
" Bodaevent:
Continental Flood Basalt Province.Alternatively to a bolide impact, LIPs have been postulated as warming triggers."The forcing here that matters is Ice albedo reduction due to dust and ashes.
We can see this again when younger impacts and events causie warming rather then cooling.
An accumulation of dust and ashes at the poles are the result of a rather quickly cleanse of the atmosphere."(3) The period following the Katian sees falling CO2 and falling temperature.
The period of high glaciation during the Himantian sees CO2 estimates
dropping to perhaps 1500ppm. Relative to our recent ice ages with 180ppm CO2,
the Himantian CO2 forcing would thus be perhaps +11Wm^-2 while the relative solar forcing would be -8Wm^-2."(3) "dropping to perhaps 1500ppm". The Schwarck study claims PAL up to x6 till x20. Please specify "perhaps"
and clarify why it is not PAL but minimum PAL x3 according to you. Where are Schwank et.al wrong ?Reminding here that the level of CO2 does not matter in the first place unless it is below PAL (max -1°C), using my axioms.
Again you apply axiomatical values, which are not needed to explain temperatures, you are still using the FSP as a theory support, or to bring it in an equilibrium with
CO2 forcing, by trying to "ramp up" CO2 to a minimum of 1500ppm. Ironically this opposites many attempts
that try to lower CO2 to explain why a glaciation happens, despite ~6000ppm before and after the glaciation, in the first place. These views higlight the needs to explain CO2 forcings as assumed (too high)."(4) Your assertion @89 is that the major forcing of climate is the tectonic positioning of land over polar regions.
Yet there was such land over polar regions throughout the Ordovician when these great swings of climate appear suggesting
the climate was being forced by entirely different mechnisms.I would therefore suggest you have failed to provide any support for your assertion "CO2 is no driver at all." "
(4)This is partly true, as strong as it is the Ice has to build up, which happens very quickly in the hirnation, after the Bodaevent.
The middle to late ordovician is in transition, the continental drift towards the pole is remarkable.
Which is documented with the Silurian:Furthermore one has to take in account the varying lengths of time periods. The ordovician has been added historicaly,
it was included in the silurian before, therefore this interesting periods are "staunched".Antarctica shows a trend towards having a "drop back" to the south pole, mentioned in the devonian and possible in the jurassic.
Maybe this happened here too and we need more accurate paleogeorgraphic data.Answering two other comments here made by other users:
89.Moderator response:
"[PS] This is heading way into sloganeering territory. You are selecting only observations that support your ideas and ignoring completely all others. Science does not operate that like.
You cannot ignore measured increase in downwelling radiation, conservation of energy, nor explain past climate change with hand-wavy statements that violate physics.
If you have a theory that can match all observations, simpler and with better precision than current theory and concordant with laws of physics then by all means publish. Meanwhile,
current climate theory is the one that matches Occams razor. No more half-baked sophistry please."My theory already has a better explanation with its radical attempt, that is the whole point. This is not "sloganeering" it is just a very radical attempt so it asks for situations where we have evidence that show CO2 as a significant driver, relating to topic.
I understand that my radical attempt makes it easy for me but i have to insist on the fairness that i am allowed to show that radical assumptions that i made, make more sense then your axiomatical assumptions.
There is the inherit problem that we eventualy go off topic but i have to ask you at this point which laws and forcings (radiation, energy conservation) are ignored by me in which way ?
I ignore factors as far as they allow me, hence ockham.
I insinuate that your axioms make less sence then mine. Your critisicsm lacks precission at this stage, when it comes to why my radical assumptions are not allowed and where they are not concordant with laws of physics.90. Eclectic:
"Nyood, the importance of CO2 as a driver of climate, is supported by (A) theoretical calculations [Arrhenius and later scientists]; is supported by (B) experimental evidence; is supported by
(C) observational evidence; and is supported by (D) geological evidence. In other words, the mainstream science developed during the past 200 years.The principle of Occam's Razor is a often a helpful guide to thinking : it is not in itself evidence and it is not in itself a method of proof.
Ockham (or Occam) did not support the cutting off or ignoring of evidence. Newton and Einstein did not ignore evidence. Nyood, why do you choose to ignore evidence?"
(A) Arrhenius,Planck Feldmann et.al give a frame, it is known that we can not apply CO2 with a clear value (uncertainty). This leads to a Saturation and or Lindzen et.al and therefore inevitable offtopic, as much as i am willing to discuss it.
(B) same as (A)
(C) I clame that observational evidence support my theory today: Dramatic CO2 increase with a moderate warming trend. My initial post was rightfully snipped of modern time references as offtopic.
(D) Geological evidence is the core of the LPC theory.
Moderator Response:[DB] Off-topic, sloganeering and inflammatory snipped.
Please note that posting comments here at SkS is a privilege, not a right. This privilege can and will be rescinded if the posting individual continues to treat adherence to the Comments Policy as optional, rather than the mandatory condition of participating in this online forum.
Moderating this site is a tiresome chore, particularly when commentators repeatedly submit offensive, off-topic posts, ignores the refutations of others (sloganeering) or simply makes things up. We really appreciate people's cooperation in abiding by the Comments Policy, which is largely responsible for the quality of this site. The point of commenting is to further the understanding of the science, using credible evidence and citations to credible sources. Much of what you are attempting to do would be better-placed on other threads (many exist). Blanket asserting that the greenhouse effect is not well-documented, well-researched and well-understood is an own-goal and a waste of everyone's time.
Finally, please understand that moderation policies are not open for discussion (complaining about moderation that everyone else has little to no issues with rather than simply adhering to the Comments Policy likewise wastes everyone's time). If you find yourself incapable of abiding by these common set of rules that everyone else observes, then a change of venues is in the offing.Please take the time to review the policy and ensure future comments are in full compliance with it. Thanks for your understanding and compliance in this matter.
-
One Planet Only Forever at 04:59 AM on 5 November 2019It's methane
Estoma,
I hope that the development of the Sustainable Development Goals improve awareness and understanding of how fatally flawed the developed ways of living are, including but not limited to the problem of methane resulting from human activities.
There are many examples of undeniably 'unsustainable and harmful developments'. And in each major case there is evidence of damaging resistance to correction.
The most glaring example of harmful developments and resistance to correction is fossil fuel use. Climate science has unwittingly produced the powerful proof of how fatally flawed the developed socioeconomic-political systems are.
Hopefully the Climate Science case will be a Tipping-point regarding the awareness and understanding of the need for Governing/Limiting what is allowed to happen to ensure that the results will be sustainable improvements for humanity. Ethical governing/limiting to achieve and improve the Sustainable Development Goals, including limits on merthane production, is undeniably required when people pursue Personal Benefit or Status relative to Others, especially in Competitions for Popularity and Profit.
-
MA Rodger at 01:15 AM on 5 November 2019Climate Change: The 40 Year Delay Between Cause and Effect
kootzie @66,
The paper you reference Zickfeld & Herrington (2015) 'The time lag between a carbon dioxide emission and maximum warming increases with the size of the emission' adds to the findings of Ricke & Caldeira (2014) 'Maximum warming occurs about one decade after a carbon dioxide emission' by modelling different sizes of CO2 impulse from 100Gt(C) to 5000Gt(C) while Ricke & Caldeira consider just the one size of impulse - 100Gt(C). (Note that we have emitted nearly 700Gt(C) and are today adding to that total at a little over 11Gt(C)/year.) Within such models of a CO2 impulse, the warming from the CO2 forcing is impacted by the drawdown of CO2 from the atmosphere which reduces the resulting CO2 forcing. Were we to stop our CO2 emissions, reduce that 11Gt/yr to zero, we should expect a similar rapid response to this end of emissions with atmospheric CO2 levels falling away (initially quite quickly) and temperature increases replaced by roughly constant temperature.
Be sure not to confuse these 'impulse' response times with the response to an increase in atmospheric CO2 levels in which the increased CO2 level (and associated forcings) is maintained in coming decades/centuries. Such projections are quite common (they re used to calculate ECS) and show perhaps 40% of the warming within the first decade followed by a long slow warming lasting into the following century.
-
kootzie at 00:09 AM on 5 November 2019Climate Change: The 40 Year Delay Between Cause and Effect
I just came across this paper which indicates a much shorter response time of 10ish years for the full effect to be observed with that tome-reaponse being dependant on the size of the impulse
https://iopscience.iop.org/article/10.1088/1748-9326/10/3/031001
-
jabell at 23:21 PM on 4 November 2019CSLDF: Here’s How Science Has Suffered During the First 1,000 Days of Trump
Please note that the second pie chart repeats the first, although correctly titled from the original source.
-
Estoma at 22:38 PM on 4 November 2019It's methane
One Planet Only Forever, thank you for your interesting reply. There hasn't ever been a time when humans haven't advertised to the detrament of society. I fear that by the time we come to the realization that it might be to little to late.
-
KingInYellow at 19:47 PM on 4 November 2019Ynyslas, western Wales – a place made by climate change
Lookds like I'll be buying this book. Spent many field trips for my degree, forced to go to the beach at Ynyslas (and one surveying Borth bog). :-)
Fascinating location with many rare features.
-
MA Rodger at 17:45 PM on 4 November 2019CO2 was higher in the past
Nyood @89,
You ask that we roll back to your initial comment here, up-thread @83 where you begin by quoting from a talk by Schwark & Bauersachs [slides] quoting from its summary:-
"Massive perturbations of the atmospheric and hydrospheric carbon cycle occurred with CO2 concentration varying between 8-16 x PAL and near PAL over short periods of time." (PAL = Present Atmospheric Level.)
From this you conclude the following:-
"This is quite remarkable, it tells us that a glaciation is capable to absorb even CO2 ammounts of 6000ppm. It does not matter how high CO2 Levels are, a glaciation will happen when the following event occurs:"
Your conclusion is incorrect on a number of levels.
(1) The total climate forcing from 6000ppm CO2 is very roughly 40Wm^-2. There is no evidence to suggest that climate was impacted by such forcings (from any source) during the Ordovician.
(2) According to your cited reference (slides 11 & 14), the period with elevated CO2 significantly above 4000ppm coincides with the Katian, a period of warming.
(3) The period following the Katian sees falling CO2 and falling temperature. The period of high glaciation during the Himantian sees CO2 estimates dropping to perhaps 1500ppm. Relative to our recent ice ages with 180ppm CO2, the Himantian CO2 forcing would thus be perhaps +11Wm^-2 while the relative solar forcing would be -8Wm^-2.
(4) Your assertion @89 is that the major forcing of climate is the tectonic positioning of land over polar regions. Yet there was such land over polar regions throughout the Ordovician when these great swings of climate appear suggesting the climate was being forced by entirely different mechnisms.
I would therefore suggest you have failed to provide any support for your assertion "CO2 is no driver at all."
-
nigelj at 17:05 PM on 4 November 2019CSLDF: Here’s How Science Has Suffered During the First 1,000 Days of Trump
And the administrations attacks on science have implications that cause even more trouble for example here: NOAA’s chief scientist will investigate why agency backed Trump over its experts on Dorian, email shows
-
Eclectic at 05:40 AM on 4 November 2019CO2 was higher in the past
Nyood, the importance of CO2 as a driver of climate, is supported by (A) theoretical calculations [Arrhenius and later scientists]; is supported by (B) experimental evidence; is supported by (C) observational evidence; and is supported by (D) geological evidence. In other words, the mainstream science developed during the past 200 years.
The principle of Occam's Razor is a often a helpful guide to thinking : it is not in itself evidence and it is not in itself a method of proof.
Ockham (or Occam) did not support the cutting off or ignoring of evidence. Newton and Einstein did not ignore evidence. Nyood, why do you choose to ignore evidence?
-
nyood at 02:43 AM on 4 November 2019CO2 was higher in the past
Moderator Response:
"[DB] Please re-read the entire post before commenting. As the post notes, CO2 is not the only driver of climate.
No climate scientist makes any such assertion. So you tilt at windmills of your own building."There seems to be a missunderstanding here, apologies for my bad writing in my initial post if this is the reason for the confusion.
I do not contest that or if CO2 is a sole climate driver. I state that CO2 is no driver at all.
So let me try to give a summary here again:
The theory is radical. The two equilibriums glacial period (high landmass ratio within polar circles,high LPC) vs Hot House Effect (HHE),
are that dominat, they neglect all other drivers. low LPC will result in a HHE no matter what.
General backround HHE forcing is so effective, all other factors do not matter, the warming rate is always rapid, the transition is always within 100 mio years.
The second largest factors that still have significant forcing are all factors that relate to albedo foremost ice albedo (dust, ashes, sea level).Following Orckham we have several situations where neglecting CO2 makes way more sense than assuming any significant forcing.
Ordovician high disparity of CO2 and T. Carboniferus CO2 drop way before temperature (T) drop. Jurassic CO2-T meeting. Cretaceous all time highest discrepancy.
The situations where an explanation for CO2 is needed to justify its assumed forcings, is simply and higly objected by Orckham`s razorblade principle.
So politely i have to say dito: Please re-read my initial post.
Moderator Response:[PS] This is heading way into sloganeering territory. You are selecting only observations that support your ideas and ignoring completely all others. Science does not operate that like. You cannot ignore measured increase in downwelling radiation, conservation of energy, nor explain past climate change with hand-wavy statements that violate physics. If you have a theory that can match all observations, simpler and with better precision than current theory and concordant with laws of physics then by all means publish. Meanwhile, current climate theory is the one that matches Occams razor. No more half-baked sophistry please.
-
One Planet Only Forever at 02:28 AM on 4 November 2019It's methane
Estoma@47,
As a pursuer of improved awareness and understanding, and the application of that constant learning to help develop lasting improvements for all of humanity far far into the future (this planet should be habitable for about 1 billion years), my understanding is that what matters regarding food is:
- the way that food is produced
- the amount of a type of food that is consumed
- the amount of consumption of non-nutritious stuff
- the ability of everyone to get adequate nutrition (and healthy water and healthy air)
The Sustainable Development Goals provide a robustly developed comprehensive basis for evaluating the acceptability of: what has developed, the required types of new developments, and corrections that are required.
And pursuing improved awareness and understanding makes it clear that competition for impressions of superiority measured by popularity and profit have driven the development, and resistance to correction of, the following harmful unsustainable food production and consumption results:
- Desires for unhealthy harmful unsustainable Diets. Many people in supposedly more advanced nations develop a liking for eating in ways that produce many understandably harmful results.
- Desires to over-consume, particularly the over-consumption of meat. The body can only process the protein from about 4 oz of meat in a meal. And a healthy diet does not require that 4 oz helping of meat in every meal.
- The preponderance of over-consumption of non-nutritious stuff.
- The starvation and malnutrition of portions of the population which is a result of competitions for popularity and profit, including the way people are driven to not be as aware and understanding as they should and could be.
A major driver of harmful unsustainable developments is successful disinformation and misinformation marketing (Misleading storytelling). That success is due to people developing an 'interest in trying to Win in harmful ultimately unsustainable ways', combined with developing an easily impressed population that resists improving understanding when that awareness and understanding would require changing developed popular and profitable activity and related perceptions of prosperity or opportunity for personal benefit.
The supposedly more advanced nations have not succeeded at developing populations that pursue improved awareness and understanding. What they have developed is populations easily tempted to be passionately triggered by misleading marketing developed and delivered by pursuers of harmful and unsustainable popularity or profit.
And Social Media and News Media pursuing popularity and profit can be seen to be publishing a lot of misleading stories that do not help improve the awareness and understanding of what is really going on regarding food.
The need to correct many things regarding food production and consumption does not mean 'eliminating those things'. However, the fossil fuel burning related to food does indeed need to be ended, not just be reduced.
With that understanding in mind your concerns are warranted. Reread the article. It will likely become obvious how much of it is sensationalist extremist correction resistant storytelling trying to defend the 'harmful unsustainable creations developed by competition for impressions of superiority measured by popularity and profit' rather than 'helpfulness to developing a sustainable improving future for all of humanity'.
Many popular and profitable developments of competition for status do indeed need to be corrected to develop a sustainable improving future for all of humanity. Reducing climate change impacts is a major, but not exclusive, part of the required corrections. Human activities that create accumulating negative impacts, like the use of fossil fuels need to be ended. Other changes of human activity that would reduce GHG levels in the atmosphere are also helpful, but do not need to be taken to the extreme correction (the elimination of them) that is required regarding fossil fuel use.
-
Estoma at 22:43 PM on 3 November 2019It's methane
Just read the USA today opinion article entitled, "Let them eat steak: Hold the shame, red meat is not bad for you or climate change."
https://www.yahoo.com/news/let-them-eat-steak-hold-090012002.html
My concern was not over whether eating meat was unhealthy or not. It was the claim that it didn't effect AGW because livestock only account for a 2,6% increase in CHG's. I checked a 2017 study in PNAS which verified the 2.6% reduction in greenhouse gases due to other factors ivolved in increasing the amount of plant production.
https://www.pnas.org/content/114/48/E10301
The thing for me is; are we bound to keep producing plant based food under the methods were producing it today? Do we have to keep producing plant based food with the same CHG intensity that were presently producing it at? My family grows 16 acres of organically grown vegetables in field and high tunnels but I'm skeptical that it can be the solution for feeding the world at this point in time.
The study also concludes, "the removal of animals resulted in diets that are nonviable in the long or short term to support the nutritional needs of the US population without nutrient supplementation." My wife and son eat absolutley no meat and I'm what I like to term a "social caravore." If your serving meat I'll partake but that's the extent of my fleash eating activity. I'm 72 and my wife is 69 and my son is 38. Last year when I told my doctor that unlike my friends and I've never had a stress test or an EKG. She ordered up an EKG. The tech came in and did the test. About 15 minutes he popped her head in the door and said, "Your an athlete, arn't you?" to which I replied, I'm a farmer. I'm not sure why our diets would need suplamention. I'm concerned about what I'm reading.
-
Eclectic at 14:36 PM on 3 November 2019CO2 was higher in the past
Nyood @87 , my apologies to you, for my speaking overly-briefly about LIP eruptions.
My example of the Siberian Traps event demonstrated the vast release of CO2 and consequent high temperature rise on Earth. The Deccan Traps event was smaller in effect, and also was complicated by the cooling effect of the Chicxulub asteroid impact.
You are quite right to say LIP events can have a transient cooling effect from the venting of sulphate & other aerosols . . . and also in the much longer term, the exposed silicate rock does gradually draw down the atmospheric CO2 (and hence the lower CO2 will lead to a global cooling, relative to what had gone before).
My essential point with respect to Antarctica, was that a future LIP eruption could be of enough size to produce a major boost in atmospheric CO2 and consequently a major temperature rise for a lengthy period ~ sufficient to melt away the huge Antarctic ice sheet.
We must hope that a major LIP eruption will not occur, for its result could be catastrophic.
The question of Ordovician temperatures and glaciation is a difficult one, for the timing of events & CO2 changes rests presently on low-resolution data. For the relevance to the climate of the modern age, we must rely heavily on the lessons from basic physics.
Moderator Response:[JH] Links activated.
For future reference, when you include a link in a post, please activate it by using the "Insert/Edit Link" feature of the Edit Box.
Prev 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 Next
