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Turco at 15:29 PM on 9 April 20193 clean energy myths that can lead to a productive climate conversation
I'm a bit skeptical about *unsubsidized* renewable being cheaper than fossil . If it is , then the market would take care of switching everyone towards renewable without the need for CO2 emission controls, or a carbon tax.
In other words why haven't energy companies switched to renewable en masse already to maximize their profits if renewable was cheaper.
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scaddenp at 12:27 PM on 9 April 2019CO2 lags temperature
The real devils are the ones that know they are lying rather than self-deluded. This one sounds more like they have acquired undue confidence from being deeply mired in denier myths.
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TVC15 at 11:56 AM on 9 April 2019CO2 lags temperature
@585 scaddenp
Trust me he's a sly devil. He berates anyone who challenges his climate myths. He's a bully and his posts are very sneaky. He posts those two graphs so many times and tells people to "learn from them".
He's the most sneaky climate myth posting person I've ever encountered. He truly thinks he's smarter than all the rest.
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Bob Loblaw at 10:42 AM on 9 April 2019Milankovitch Cycles
stonefly:
I've been AFK, but yes, it's the earth-sun distance variation that causes the seasonal changes. Inverse square law and all that. Combine that with the geographical (land/ocean) difference between southern and northern hemispheres, and you get variations in climate.
As glaciation is strongly a northern hemisphere phenomenon, the glaical periods tend to be linked to periods of low summer NH insolation.
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One Planet Only Forever at 08:42 AM on 9 April 2019Protecting oil companies instead of the climate-vulnerable is elitist
nigelj,
I understand the current very low probability of a catastrophic future climate impact event triggered by accumulated human impacts. But as the decades of slow action to curtail fossil fuel use drag on, the probability of such unbelievable events increases. And the distraction of a search for improved understanding of 'other possible emergency actions' becomes more tempting. And the 'lesser of the evils' arguments become tragically more likely.
The current generation already faces a tragic 'lesser of evils' decision making process in the face of a more daunting requirement for action because of the lack of corrective action by previous generations. Popular and profitable over-development in incorrect directions has created a bigger problem needing more rapid correction that is actually harder to increase the rate of correction of (because many more fortunate people would be less fortunate because of the required correction, especially if the progress of poverty reduction has to be maintained and improved upon, which it does).
Sunspot's comments lead me to believe that they likely consider global dimming to be a potentially helpful action. They may also support delaying actions to reduce the global dimming produced by the current use of fossil fuels. Sunspot may even support increasing the global dimming impacts from use of fossil fuels while the global economy is being corrected by leadership taking actions to more rapidly curtail the use of fossil fuels.
The consideration of the benefits of particulate reduction started in your comment @12. And our back and forth comments quickly clarified our alignment on the ethical points related to that issue, concluded with my comment @15.
Sunspot then commented @16 indicating concern about reducing particulate, implying the potential benefits of artificial global dimming. And Daniel Bailey @17 correctly challenged Sunspot's claim that very rapid and significant change of global average surface temperature would occur today if the artificial global dimming due to fossil fuel use was to suddenly be stopped.
Sunspot @18 added the concern about massive methane release from the Arctic, implying a potential support for the idea of artificial global dimming to reduce the risk of that potential result.
Sunspot @22 then declared there were ethical benefits from global dimming. Sunspot's response to my comment @20 included “So, a bad and immoral (I guess) action by humans actually has a beneficial effect. Maybe everything isn't so black-and-white after all...”. That presumption of Good being produced by a 'supposed immoral' action needed to be challenged in depth.
I will go through it in a little more depth because it is so important for people to be aware of.
The core ethical argument against that line of thinking starts by pointing out the moral risk of leaders allowing more CO2 to accumulate because global dimming is popularly claimed to be able to counter-act it. If that excusing of more CO2 emissions was actually successful, then the disaster threat of the rapid ending of global dimming could indeed become a very tragic reality that was avoidable (the only barrier to it being avoided being the moral corruption of leaders). It would be the result of promotion, research and discussion regarding global dimming that incorrectly encourages people to care less and do less about reducing the burning of fossil fuels.
Additional ethical arguments against artificial global dimming would include the likely negative impacts of the global dimming on life in many regions of the planet, impacts that are in addition to the added risk of more massive future harm because of a loss of focus on the core ethical requirement to rapidly curtail the harmful impacts of the use of fossil fuels. And the negative impacts of use of fossil fuel include the artificial global dimming it also produces.
The discussion of artificial global dimming being potentially helpful in a socioeconomic-political system that is already morally compromised can develop a very insidious potentially popular claim-making. It could be claimed that as the use of fossil fuels is wound down they should be burned without abatement of the production of global dimming impacts, because dimming is beneficial.
There is a clear moral peril associated with the consideration of any alternative to the actually required rapid termination of the use of fossil fuels and all of the associated negative impacts. Other actions need to limited to being potential supplementary beneficial actions. As such, as supplementary actions deemed to only be helpful additional actions, they must not have any potential negative aspects related to them. And the worst negative aspect would be 'less focus and effort on curtailing the use of fossil fuels', resulting in increased probability of future catastrophic climate change events.
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scaddenp at 07:17 AM on 9 April 2019CO2 lags temperature
TVC - I think "sly devil" is unkind - he is just doing what is natural for all of us, namely indulging in motivated reasoning to justify a preferred belief. If you have a reason to deny AGW (usually ideological or identity based), then there is a vast reserve of misinformation out there to provide comfort. Sadly, debunking those points will only result in either denial of facts or moving on to the next cherry-picked point. At best, you are talking to observers of your discussion. Ever tried discussing evolution with a young earth creationist? It becomes obvious quickly that discussion is never about the science but more about the importance of particular way of reading the bible to their beliefs. That is where the discussion needs to happen before they can be even open to talking about science. Hayhoe's TED talk I pointed to earlier suggests a similar way forward.
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nigelj at 07:09 AM on 9 April 20192019 SkS Weekly Climate Change & Global Warming Digest #14
Regarding arctic sea ice: Watch: Hundreds of walruses face plunging to death due to climate change
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ThinkingMan at 04:38 AM on 9 April 20193 clean energy myths that can lead to a productive climate conversation
Mr. Sweet & scaddenp,
Pls do not misconstrue my delayed replied to your comments as a lack of interest. Regrettably, because skepticalscience's insights are appreciated, I can read the website only 1x or 2x per week.
To reply sooner rather than later to your comments, I will do so in a series of replies.
Mr. Sweet, we will have to agree to disagree about the quality of Alberta's day ahead wind power forecasts. Reality is routinely outside forecast range. Reality is outside the range even though the high end of the forecast range is typically 4x the low end of the range. Broken clocks forecast better than that.
On the other hand, day ahead forecasts predict well the direction of change. That can help guide decisions about preparing reserves for use.
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SirCharles at 03:28 AM on 9 April 20192019 SkS Weekly Climate Change & Global Warming Digest #14
This meta study got published today:
Key indicators of Arctic climate change: 1971–2017
https://www.youtube.com/watch?v=asKIeN0pYTk
Also see this article at Inside Climate News on the study:
Global Warming Is Pushing Arctic Toward ‘Unprecedented State,’ Research Shows
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TVC15 at 16:16 PM on 8 April 2019CO2 lags temperature
@582 MA Rodger
@scaddenp
Thanks once again! This particular denier is one sly devil for sure.
The tactics used by climate deniers will never cease to amaze me!
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nigelj at 10:01 AM on 8 April 2019Protecting oil companies instead of the climate-vulnerable is elitist
OPOF @24, what you say is true and needs to be said, however I dont think sunspot was advocating some form of solar geoengineering. I think he was just listing various concerns, although in a rather haphazard sort of way.
Regarding rapid, sudden climate change, methane clathrate bombs etc the following article is a good assessment of worst case scenarios.
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scaddenp at 08:06 AM on 8 April 2019CO2 lags temperature
This is pretty typical climate ball even if graph is honest. Ignore that climate is always the result of net forcing and focus on CO2 only. Scan the data looking for anything, anywhere to find an interval where CO2 and temperature out of sync, ignore other possible causes and declare it a proof. Especially ignore the other overwhelming evidence of the effect of CO2 particularly in the modern era where, unlike ice core, we can know the value of all the other forcing in play.
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One Planet Only Forever at 01:59 AM on 8 April 20192019 SkS Weekly Climate Change & Global Warming News Roundup #14
nigelj,
The fact that decades of 'deliberate lack of correction, particularly by the wealthy and powerful' have over-developed human activity to the current degree is a very poor excuse to 'reduce the rate of correction'.
The continued 'diminished amount of correction, because of concerns regarding lost perceptions of prosperity and superiority' only develops a bigger future problem. And knowingly participating in creating more harm is almost criminal (should be limited by criminal penalty).
This cycle of making problems so big that catastrophe is the result has to be broken. And every current generation is 'the only ones' who can 'break the cycle of harm'. And every current generation, particularly the wealthier and more powerful, that does not act aggressively to break the cycle of moral corruption is complicit in the increased future harm done.
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BaerbelW at 00:54 AM on 8 April 2019Getting involved with Climate Science via crowdfunding and crowdsourcing
Updated the post with ClimateAdam's recently launched Patreon project.
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One Planet Only Forever at 00:41 AM on 8 April 2019Protecting oil companies instead of the climate-vulnerable is elitist
sunspot,
I strongly recommend that you read Stephen Gardiner's "A Perfect Moral Storm-The Ethical Tragedy of Climate Change" published in 2011. Gardiner's 2016 article in the Washington Post "Why climate change is an ethical problem", is a partial presentation of his ethical argument about the moral corruption that can be observed to be occurring in matters related to climate change.
Re-read my comment with the awareness that people can be easily tempted into moral corruption. Ethically artificially 'dimming' the sky would require 'proof that the artificial action chosen to be allowed to be done by humans is almost certain to not harm life in any region of the planet'. The same moral obligation, or governing limit of behaviour, is the reason for the need for the rapidly correction of the incorrect over-development of the use of fossil fuels.
Almost everything I have read about the impacts of global dimming indicate that such an action is almost certain to result in harmful impacts on life in many regions of the planet (admittedly some shallow presentations make no mention of that aspect of artificial global dimming).
It is essential to appreciate the moral obligation to protect the entire robust diversity of life on this planet that humans survive as a part of. That obligation includes the need to limit actions based on the obligation to not harm people in remote regions that we will never meet and future generations who, of course, never can be met.
Humans have very little understanding about the parts of the web of life that they do not need to survive. Future generations find out after the fact what parts of the diversity are helpful to our survival, typically most tragically after popular and profitable human activity develops that resists correction. And more tragically, it is impossible to find out 'after the fact' what aspects of life that our actions cause to become extinct could have been helpful.
The challenge of 'proof of no harm done by deliberate artificial global dimming' is unlikely to be provided. My point remains, discussion of global dimming can become a morally compromising problem if it in any way distracts from the needed focus on efforts to rapidly correct the incorrectly over-developed use of fossil fuels. And the greatest danger of discussions of how to do such a thing in an already morally corrupted socioeconomic-political environment is the potential that morally corrupted leaders In One Nation could try to get away with benefiting from it to the detriment of others by delaying the reduction of use of fossil fuels by the population of their nation 'because it is claimed that something like global dimming can deal with the problem', or worse that the nation Unilaterally causes global dimming in a way that they 'believe and claim will benefit their nation'.
In an already morally corrupted socioeconomic-political system the helpful actions need to be restricted to actions that correct harmful developed attitudes and actions. It is morally corrupt to consider additional artificial actions to be a 'cure' based on the unjustified hope that they will fully helpfully counter-act a harmful artificial action that needs to be stopped, no new harms done.
Based on that understanding about the only artificial action I see as morally justified is the addition of CO2 scrubbing if it can be proven that there are no harmful side effects. And as nigelj has correctly pointed out, ethical helpful (no harm done) CO2 scrubbing is unlikely to be able to be significantly helpful.
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MA Rodger at 18:39 PM on 7 April 2019CO2 lags temperature
TVC15 @581,
I'm not sure what has happened to the red trace on your version of the EPICA data - I think its x-axis is stretched perhaps three-times longer than it should be.
As for the denialist, hs is simply taking tiny bits of EPICA data and graphing them in a way to hide any CO2-T relationship. Frankly, I would not accept his trustworthiness unquestioned. If he tries such deception, why not start fiddling with the data being plotted to assist the deception?
His two graphs are the lead-up-to and the follow-on-from the height of the Eemian interglacial. If they had been joined together, his little game would be clearly exposed.
The graph below was taken from this RealClimate page. The denialist hides the obvious CO2-T correlation in the lead-up by flattening the CO2 plot with a y-axis from 0-to-300ppm (while his follow-on graph plots a little more sensibly from 220-to-300ppm). With his graph of follow-on CO2 & T, the graph below does show that temperature fell away from the height of the Eemian while CO2 levels were a little less depressed. (Figure 1 in the OP above shows this quite well.) Of course, CO2 isn't the only driver of climate and the EPICA data plotted below does show methane levels dropping quickly through that follow-on period.
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michael sweet at 10:37 AM on 7 April 2019Protecting oil companies instead of the climate-vulnerable is elitist
Sunspot:
Here at Skeptical Science we try to focus on what data is known. The scientific consensus is generally accepted as what is known. Sometimes there is no consensus on a topic and it is interesting to review the various proposals.
In any discussion we support our arguments with data that comes from the scientific literature. BBC documentaries are sometimes helpful but are not considered authoritative. If you say what you think based on something you read on the internet that is hearsay and not acceptable. You might want to read the comments policy.
The rule that you have to provide evidence to support your claims keeps the discussion within limits. Sites that allow anyone to say whatever they think devolve into arguments we do not like.
Your claims have been made before. They are at the extreme of scientific views. We all hope that they are incorrect. If you want to discuss them someone might engage you if you have a less hostile attitude.
A word to the wise: the fastest way to get banned is to suggest you should be banned. Any complaints about moderation will cause you problems. If you provide evidence to support your worries people will engage with you.
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Sunspot at 08:33 AM on 7 April 2019Protecting oil companies instead of the climate-vulnerable is elitist
I have no idea how anything I have said can be interpereted as supporting an intentional program of combatting Global Warming by using a Global Dimming strategy. I don't support such efforts.
There is evidence for a rapid rise in temps in the few days after 911 when the planes in the US were grounded. Here's the BBC Horizon video from 2005: https://www.youtube.com/watch?v=c0BMyT4RCzY&t=41s There is a lot of other information on Global Dimming, some from sources that people here might actually trust. At any rate, you'll be hearing more about it - I just saw it in a MSM article the other day...
"If the particulate is due to human actions that are unsustainable and harmful, then the global dimming is unsustainable and harmful." Well, in this case, the "cloud" actually does reflect solar energy back into space. Just like any cloud, right?? This has a cooling effect. I have certainly noticed that it is generally cooler on a cloudy day. Brown pollution clouds certainly act the same way, and I don't think that's conjecture. So, a bad and immoral (I guess) action by humans actually has a beneficial effect. Maybe everything isn't so black-and-white after all...
While we're talking (before you ban me) - the Methane video being promoted here ignored the real issue as to a SUDDEN release of large quantities of methane. The video discussed permafrost discharges from the land, which of course really can't come out suddenly due to the nature of the situation. However, the video didn't even mention the vast amount of methane stored in the sediments of the Arctic Ocean, which certainly can be released suddenly in large quantities. Clathrates are very unstable, and a warm pulse of salty water just might trigger something. MIGHT! Please don't accuse me of thinking that I know what is going to happen, BECAUSE I DON'T. And I'm sorry if these concepts don't fit neatly in the Skeptical Science philosophy that the warming will be linear, we can fix it with enough windmills and solar panels, and we will go on living our middle-class lives with just a little tweaking. And bad things might happen in 100 or 200 years. I suppose it's comforting to think this, but for a site that pretends to be all about science, you have to ignore a lot of science to come to that rosy conclusion.
So you can ban me before or after publishing this comment. I'm sure I once again violated all sorts of rules and regulations and guidelines or whatever. Forgive me for using plain English.
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nigelj at 08:22 AM on 7 April 20192019 SkS Weekly Climate Change & Global Warming News Roundup #14
Like another character named Don, US President Donald Trump is tilting at windmills. The president disparaged wind farms this week while spinning his arm like a turbine and making an unpleasant whirring sound. TRUMP: "If you have a windmill anywhere near your house, congratulations. Your house just went down 75 per cent of value."And they say the noise causes cancer." - remarks at Republican fundraising dinner Tuesday.
The facts. The sound from wind farms has not been proved to cause cancer. Trump has had it out for wind power since turbines were proposed off the coast of Scotland within sight of his golf resort near Aberdeen.
(America by electing this guy you make yourselves look incredibly stupid, just in case you don't know by now)
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nigelj at 07:50 AM on 7 April 20192019 SkS Weekly Climate Change & Global Warming News Roundup #14
We are indeed "gobbling up the earth's resources at an unsustainable rate" and its pretty darned serious, but I feel solutions need to also be realistic as well. Expecting people to reduce use of their use of cars by "90% this decade" and other drastic changes in consumption are not realistic to me. 25% might be a more realistic goal. Public transport is desirable, but cities are spread out and its hard making it work for everyone.
While land based lithium reserves are limited, there are billions of tons dissolved in sea water (along with most other metals) and numerous other battery technologies under development not reliant on lithium here.
More realistic solutions to looming resource scarcity problems would include this generation of people aiming for zero rates of population and economic growth, recyling, and wasting less, although poor countries have to be allowed economic growth.
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william5331 at 06:25 AM on 7 April 2019Why results from the next generation of climate models matter
I wonder if the new models take aerosols into consideration. Have we done enough research for them to be realistically included.
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nigelj at 06:02 AM on 7 April 2019Protecting oil companies instead of the climate-vulnerable is elitist
"If we actually succeeded in eliminating the "Asian brown cloud", the increased solar energy reaching the surface of the planet would lead to a very rapid increase of the global average temperature of up to .5 degrees C, within a few days to maybe a week."
0.5 degrees c is conjecture with no evidence, but even if it was correct use of all coal fired power won't stop simultaneously, so temperatures could not possibly rise 0.5 degrees in a week. In fact any gobal dimming would be gradual spread over years. It's just another in built problem created by burning fossil fuels.
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TVC15 at 05:58 AM on 7 April 2019CO2 lags temperature
Hi,
I am dealing with a denier who constantly puts up graphs that he's created from the EPICA Ice Core Data.
This denier makes the following cliams.
No correlation, and EPICA Ice Core data proves it:
Temperature increases CO2 levels, but CO2 levels do not increase temperature.
I made my own graph of the EPICA Ice Core data and it appears that this denier is only taking a very small era of time from the EPICA ice core data.
Here is my graph of the data and the yellow highlighted section appears to be erea of time this dener is zooming in on.
Moderator Response:[DB] Please limit image widths to under 500 pixels.
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One Planet Only Forever at 02:15 AM on 7 April 2019Protecting oil companies instead of the climate-vulnerable is elitist
Regarding 'global dimming from particulate' as a potential way to 'address the climate vulnerability' problem.
If the particulate is due to human actions that are unsustainable and harmful, then the global dimming is unsustainable and harmful. At some future date the unsustainable harmful human action has to be stopped. It would be morally unacceptable for more harmful CO2 impacts to be created because 'human induced global dimming is claimed to be helpful'. There is more harm from the burning than the excess CO2 that stays in the atmosphere.
Therefore, the people wanting to promote global dimming must be required to prove conclusively that no harmful consequence will occur as a result of the 'added human impact on the global climate system' or the diversion of human brilliance from the need to reduce the harms of fossil fuel burning. That means proving that maximum effort to curtail fossil fuel burning will still happen if global dimming is considered.
Another way to state the moral requirement is that global dimming would be done only if it is almost certain to create no harmful impacts and be done in addition to aggressive reduction of the harms done by fossil fuel burning.
The current generation is clearly morally challenged by the growing need to minimize the harm done to the future generations. The development of unsustainable and harmful pursuits of profit has been morally corrupting societies and the development of their economies for a very long time. For many decades the ability of societies to develop sustainable improvements for the future generations have been overwhelmed by the burden of having to try to minimize the developed and developing harm done to future generations by popular and profitable attitudes and actions. Economies are loaded with harmful activities. Correcting them without reducing perceptions of prosperity and opportunity is virtually impossible. And the required decline of perceptions of prosperity and opportunity for the increases each year of 'continued progress in unsustainable and harmful directions'.
Regarding climate change, the identified moral requirement is to limit of impact to 1.5 C warming, with impacts to the level of 2.0 C reluctantly identified as an absolute upper limit of impact.
Regrading global dimming, the temperature limits must be understood to be met without any additional help from human induced global dimming. And the global dimming actions must also be proven to have virtually no risk of causing any harm to people in any region of the planet. Global dimming promoters may be able to met that standard of proof to be able to morally justify consideration and pursuit of such an action. But discussing human induced global dimming without clearly correcting for the morally corrupted reality of currently developed socioeconomic-political environments is likely to result in more harm being done.
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Daniel Bailey at 21:50 PM on 6 April 2019Protecting oil companies instead of the climate-vulnerable is elitist
So you don't actually have any evidence to support your assertion, got it.
Let's then return to the topic of this post.
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Sunspot at 18:54 PM on 6 April 2019Protecting oil companies instead of the climate-vulnerable is elitist
There are many sources of information on Global Dimming from the internet. There is a 2005 BBC Horizons documentary. Some of it may be speculation unsupported by peer-reviewed journalism. How about if I had said "could" instead of "would"?
I am interested in all facets of Global Warming and the Climate Change it is creating. I don't know what is going to happen. I am convinced big things are likely to happen soon. Websites like this that are so restrictive of the subjects that are allowed for discussion that it just seem unscientific to me. Global Dimming is a real thing. So is the potential for massive methane releases from the Arctic, and elsewhere. Deal with reality or reality will deal with you.
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Cedders at 18:15 PM on 6 April 2019Major PAGES 2k Network Paper Confirms the Hockey Stick
Broken link. The Carbon Brief article has moved here.
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TVC15 at 16:35 PM on 6 April 2019Climate's changed before
MA Rodger @708
Thank you for the clarifications!
scaddenp @ 706,707
Ops sorry to step off topic but I appreciate the insights. I read some interesting information about Eddenhofer on Desmog.
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MA Rodger at 14:23 PM on 6 April 2019Climate's changed before
TVC15 @701,
The sun illuminated the disc of the Earth with an intensity measured by TSI. The disc has an area of πr^2. But this energy is spread out, not over a disc but over a globe with area 4πr^2. So TSI requires dividing by 4 to give the average solar climatic impact.
TVC15 @702,
The denialist is quoted @695 saying "Is man made CO2 not 5% of atmospheric CO2?" With 410ppm CO2 in the atmosphere, 5% would be 20ppm. But since pre-industrial times CO2 has rise from 280ppm, a rise of 130ppm. If mankind is responsible for only 20ppm of this, where did the other 110ppm come from? Perhaps the denialist is believing that this extra 110ppm is down to the shape-shifting lizards, or perhaps all the unicorns he sees inhabiting the world.
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scaddenp at 12:11 PM on 6 April 2019Climate's changed before
I would also say this is totally off-topic. PLease put your comments in an appropriate thread.
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scaddenp at 12:11 PM on 6 April 2019Climate's changed before
This is more motivated reasoning. Well obviously there is science behind it - the whole IPCC WG1 is nothing but science. However, solving it is political and economic and the argument he is trying is that there is a nefarious plot by scientists who want everyone including themselves to suffer massive economic damage for no good reason except... But people which view the world through ideological glasses seem to believe this.
There is also the IPCC WG3 on ... solutions. In there you can see the published opinion from the many that have studied the issue instead of the opinions (misrepresented at that) of carefully chosen few. I wonder how well Ottmar Eddenhofer feels his views were represented by the Global Warming Policy Foundation.
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Daniel Bailey at 09:57 AM on 6 April 20192019 SkS Weekly Climate Change & Global Warming News Roundup #13
To any interested, NASA could use your support in the ongoing Webby Award voting. If you are OK with voting, vote your heart and your conscience.
I didn't vote in many categories because I lacked the background to make the needed decisions and/or the time to differentiate between the nominees, but I did what I could, where I could. NASA is currently in 2nd place in this category.
23rd ANNUAL WEBBY AWARDS
PEOPLE'S VOICE
You decide the best of the InternetVoting is open until Thursday, April 18th
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TVC15 at 08:45 AM on 6 April 2019Climate's changed before
@703 David Kirtley thank you so much. Odd that did not come up when I searched for Ordovician-Silurian.
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TVC15 at 08:43 AM on 6 April 2019Climate's changed before
I need your help again guys! I posted this statement: In July 2007, a survey of hurricanes in the North Atlantic over the past century noted an increase in the number of observed...
A denier who many on the sidelines thinks is brilliant and who I suspect is being paid to spout what he spouts responded with this.
"The operand is "observed."
You have the technology to observe both tornadoes and hurricanes that you were never able to observe in the past.
And that's the recent past, outside of the last 50 years.
There's no science behind "climate change." It's all political and socio-economic-based:
German economist and Intergovernmental Panel on Climate Change (IPCC) official Ottmar Eddenhofer, explained prior to the Cancun conference in an interview with the Global Warming Policy Foundation (Potter 2010): First of all, developed countries have basically expropriated the atmosphere of the world community. But one must say clearly that we redistribute de facto the world's wealth by climate policy. Obviously, the owners of coal and oil will not be enthusiastic about this. One has to free oneself from the illusion that international climate policy is environmental policy. This has almost nothing to do with environmental policy anymore, with problems such as deforestation or the ozone hole...Basically it's a big mistake to discuss climate policy separately from the major themes of globalization.
In a paper prepared for the Cancun conference Professor Kevin Anderson, Director of the Tyndall Centre for Climate Change Research, said the only way to reduce global emissions enough, while allowing the poor nations to continue to grow, is to halt economic growth in the rich world over the next twenty years.He called for World War II-type rationing of electricity in order to force people to conserve (Gray 2010)
Source: http://www.usu.edu/ipe/wp-content/up...Climate-Policy"
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David Kirtley at 07:23 AM on 6 April 2019Climate's changed before
TVC15 @700. Re. CO2 levels in the distant past, see this rebuttal: Do high levels of CO2 in the past contradict the warming effect of CO2?
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nigelj at 06:30 AM on 6 April 2019Why results from the next generation of climate models matter
Something related. First successful model simulation of the past 3 million years of climate change discussed here. "Our results imply a strong sensitivity of the Earth system to relatively small variations in atmospheric CO2....The climate sensitivity of the model is around 3°C global warming for a doubling of CO2 concentration, which is at the center of the range of current best estimates of climate sensitivity that range between 1.5 and 4.5°C."
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TVC15 at 06:08 AM on 6 April 2019Climate's changed before
Hi MA Rodgers,
Why would the denialist consider that just 5% of atmospheric CO2 is down to anthropogenic causes? That would be just 20ppm. Where did the other 110ppm come from? That's 860Gt of CO2 so the source should be quite evident.
I'm a bit confused. What do you mean by where did the other 110ppm come from?
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TVC15 at 05:59 AM on 6 April 2019Climate's changed before
@ 699 MA Rodger,
What is a discal projection?
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TVC15 at 05:32 AM on 6 April 2019Climate's changed before
@ 699 MA Rodger,
Indeed it's been a huge up-hill struggle in my attempts to find a way around deniers.
I appreciate all the new insights I'm gaining from this site. I am so thankful this site exits!
Here is another poor fool making these claims and trying to tell me I'm wrong for stating that analysis of past climates shows that greenhouse gasses, principally CO2, have controlled most ancient climate changes.
"Proof that CO2 does not drive climate change is to be found during the Ordovician-Silurian and the Jurassic-Cretaceous periods (approx 450 and 150 million years ago, respectively) when CO2 levels were greater than 4,000 ppm and about 2,000 ppm, respectively. If the IPCC AGW/ACC theory is correct, there should have been runaway greenhouse gas-induced global warming during those periods but instead there was glaciation.
Current CO2 level is slightly more than 400 ppm. Compare at will."
I'm not sure how to respond as I came up with nothing when I search for Ordovician-Silurian on this site.
Thank you for the great responses!
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sauerj at 05:17 AM on 6 April 2019Why results from the next generation of climate models matter
Interesting article! ... The ECS from my simple, 1-box "Temp vs CO2" modeling is 3.24 C with a 1st-order time constant of 14.6 yrs. Data from 1958 to Feb-2019. I don't know how to do the statistical math to determine the various uncertainty ranges. Could someone give me a link that will teach me how to do that for a model correlation like this? Thanks!
The math I'm using is: Temp(@yr n) = a/Ln(2) x Ln(Cn/Cb) x [1-exp(-1/k)] + Temp(@yr n-1) x exp(-1/k) ... where, a=ECS; Cn=CO2 for yr n; Cb=CO2 for the baseline yr; k=time constant; Temp(@yr n-1) is temp at previous year of Temp(@yr n). ... Note: I am using a macro to find the best-fit a & k constants. It does this by incrementing one of the constants up & down (in tighter and tighter incremental steps), and then, at every incremental step, it uses solver to find the least squares best fit for the other constant, until the incremental steps get very small. I get the same results either way, no matter which constant increments, and which constant is found by solver.
This Excel model file is located HERE [file name = TempRise vs CO2-Rise_Rev2(2019-02).xlsm]
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stonefly at 04:02 AM on 6 April 2019Milankovitch Cycles
I see also that at aphelion it is ocean rather than land mass receiving insolation.
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Daniel Bailey at 03:30 AM on 6 April 2019Protecting oil companies instead of the climate-vulnerable is elitist
Sunspot, I'm going to assume that's conjecture on your part, unless by some remote chance you can cite a credible source that supports that assertion?
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Sunspot at 02:34 AM on 6 April 2019Protecting oil companies instead of the climate-vulnerable is elitist
Reducing CO2 in the atmosphere would be a good thing of course. But reducing the particles in the atmosphere would lead to very rapid warming by reducing the reflectivity of the atmosphere, aka "Global Dimming". If we actually succeeded in eliminating the "Asian brown cloud", the increased solar energy reaching the surface of the planet would lead to a very rapid increase of the global average temperature of up to .5 degrees C, within a few days to maybe a week.
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stonefly at 02:33 AM on 6 April 2019Milankovitch Cycles
Yes, thank you, Bob.
Then I will assume that the reason precession does not treat the northern and southern hemisphere equally is because of distance.
The sun's rays strike the planet at the same degrees north latitude at perihelion as they strike at south latitude at aphelion, six months later. So it's not the angle of the sun's rays that is affected by precession, it's the distance.
Is that correct? -
stonefly at 00:02 AM on 6 April 2019Milankovitch Cycles
Yes, thank you, Bob.
Then I will assume that the reason precession does not treat the northern and southern hemisphere equally is because of distance.
The sun's rays strike the planet at the same degrees north latitude at perihelion as they strike at south latitude at aphelion, six months later. So it's not the angle of the sun's rays that is affected by precession, it's the distance.
Is that correct?
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MA Rodger at 19:43 PM on 5 April 2019Climate's changed before
TVC15 @695,
Correcting someone who refuses to be corrected is a bit of an up-hill struggle. I'm sure we have been over his (2) before (although @652 it was 4%). Why would the denialist consider that just 5% of atmospheric CO2 is down to anthropogenic causes? That would be just 20ppm. Where did the other 110ppm come from? That's 860Gt of CO2 so the source should be quite evident.
And his (7), the poor fool appears to be confusing the average length-of-stay of an individual CO2 molecule in the atmosphere with the length-of-stay of an increased CO2 concentration. On the latter, the 'half-life' is perhaps 100 years but there is a long tail in that the last fifth will remain in the atmosphere for many thousands of years. After just three years, an injection of CO2 into the atmosphere would have reduced by less than 5%. (When we consider this, we talk of the Atmospheric Fraction, the amount CO2 rises each year relative to the anthropogenic emissions. The Af is roughly 45% but implying 55% has been sequestrated into oceans/biosphere. But the 55% is actually the sum of all those tiny percentage reductions for all the years since human emissions began as a percentage of just one year's emissions.)
And back upthread @683, you quote presumably the same denialist source insisting that "the fact that we are in a 50-75 year solar minimum cooling phase". I did a quick 11-year averaging of TSI data which stretches back to 1976. The weak Sunspot Cycle has resulted in TSI dropping by 0.25Wm^-2 which needs converting from a discal projection to a global value and adjusted for albedo, yielding 0.04Wm^-2. That is about the same as one year of AGW so if there is a full Maunder Minimum on the way, its impact is yet to show up in the TSI data.
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TVC15 at 13:51 PM on 5 April 2019Climate's changed before
@696 scaddenp @697 Eclectic
You guys are great! I see most of his silly Gish Gallops can be addressed from the Myth Section here on Skeptical Science.
Thank you both so much for all the wonderful information you provide me with in order to debunk these deniers. I have learned so much from you all and I am honored to be able to interact with people who know what they're talking about!
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Eclectic at 13:33 PM on 5 April 2019Climate's changed before
TVC15 , welcome to the world of crazy Gish Gallops. Don't bother to reply on every point ~ just select a few, e.g. :-
1. On your skin, a very thin smear of suncream chemicals causes a major reduction in sunburn. A big change, from a very small dose.
13. Thermometer readings vary slightly from year to year, but the Earth is still warming because excess heat is still coming in (through the excess Greenhouse effect) and the oceans are still building up heat since they absorb around 93% of the excess incoming heat ~ that's why the world's ice is continuing to melt. No cooling and no pause in melting!
14. If it does ever happen to come, a prolonged solar minimum (just like the Maunder Minimum) will cause a cooling of about 0.3 degreesC [ about 0.5 degreesF ]. Since the world's warming is continuing at approx 0.15 degreesC per decade, that means it will take only 20 years of Greehouse warming to cancel the effect of the solar minimum (if it comes at all). And then the warming will just continue to get worse. Nope, there's no hope to be gotten from a grand solar minimum.
15. In the distant past, when CO2 was much higher, the sun's radiation level was significantly LOWER. (Over the long term, our sun gets 1% hotter per every 150 million years approx.). If you want to see oceans boil, come back in a few bilion years' time!
22. All else being the same, more CO2 is helpful to most plants ~ but in the real world, more CO2 leads to more droughts, more floods, and hotter & more prolonged heat waves : so plants suffer damage and produce less crop-yield. Not good for humans.
TVC15 , tell 'im to go away and educate himself and not spout the rubbish he's been giving us.
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scaddenp at 13:14 PM on 5 April 2019Climate's changed before
Since it looks to me like all the above are readily answerable and mostly from our myths section, I would assume that your denier has not the slightest interest in the correct answer and very much doubt they would take the time to read it anyway. Aside from the strawmen like "what happened to time without snow" -sure sign someone has never opened IPCC report.
I'd repeat, you cant reason someone out of something they werent reasoned into. If this is an online public argument, then post links to the answers here (we can help if you cant find them), so observers can see he is an idiot, but be assured that reply wont change the mind of someone who's position is based on identity. If it is someone you know, then I would recommend Katherine Hayhoe TED talk for more effective way to talk, but I suspect you are way past point where person is capable of hearing anything you say.
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One Planet Only Forever at 12:20 PM on 5 April 2019Protecting oil companies instead of the climate-vulnerable is elitist
nigelj,
I should have been clearer. My concern about pointing out the benefits of reduced particulate is that morally corrupted leaders could try to claim that reduction of particulate is a moral justification to continue burning 'clean coal'.
Reducing excess CO2 is the main ethical objective. As you said, reduced particulate is a side-benefit.
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