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DSL at 11:54 AM on 23 November 2013Will extreme weather like super typhoon Haiyan become the new norm?
WP, did you just say that total solar irradiance was constant? Did you just strongly suggest that the oceans transfer energy at a constant rate? I looked for your paper on the internet. Google found eight hits.
Why don't you take your argument to an appropriate thread.
Regulars, wasn't there a "It's solar flares" myth once upon a time. Can't find it. -
Tom Curtis at 11:43 AM on 23 November 2013Global Warming Paws Fails to Materialise: Earth Still Warming and Global Sea Level Rising Like Gangbusters
fulvus @8, try this article.
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fulvus at 11:17 AM on 23 November 2013Global Warming Paws Fails to Materialise: Earth Still Warming and Global Sea Level Rising Like Gangbusters
I continue to be mystified that in all the news I read, not necessarily in the MSM but also on sites like this one, I have never seen an article addressing the possibility that through deforestation, and acidification of the oceans, thereby killing phytoplankton, we are destroying the sources of our atmosphere's oxygen. There are two possible reasons for this that I can think of: 1) not being a climate scientist, I don't understand enough to realize that I'm overstating the problem or even creating a bogus scenario, and 2) I am on the right track but the scenario, which should be our #1 concern re climate change, is just too scary for people, even climate scientists, to look at. I would certainly appreciate feedback from anyone qualified to give it succinctly and clearly, or direction to another source where I could find this discussed.
It's a matter of the demise of almost all lifeforms on the planet. How many organisms do not breathe oxygen besides anaerobic bacteria, tubeworms at ocean floor volcanic vents, etc.? PLEASE RESPOND!
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wpsokeland at 09:30 AM on 23 November 2013Will extreme weather like super typhoon Haiyan become the new norm?
The average trmperature of our globe is varying over the past 30 years with swings of 0.1 to 0.2 degrees centigrade -- up and down. The general overall trend is upward. Since the solar constant, your only energy source ts constant and, if greenhouse gases were continually increasing via human input, the average temperature of our globe would be continually increasing. There would be no temperature swings as seen in the data. Any PhD in heat transfer would know that a different energy source is active in the real temperature variation.
My published peer reviewed paper on the subject of incoming severe weather from outer space is:
Sokeland, W. P. (2005) SOLAR PILLARS OF FIRE: Part 1: Tornadoes from the Sun, Journal of
Meteorology, UK, 30, 298
Energy is incoming via solar storms. In the case of melting northern sea ice, tropical cyclones in the Atlantic know as hurricanes have been increasing and decreasing at various times over the last 30 years. When the hurricane activity goes to a maximum, the North Atlantic Current convects increased temperatures by 1 degree centigrade to the Arctic seas due to the energy deposited in the tropics by the hurricanes and the sea ice melts. The reverse is true when Hurricane activity is a minimum. Hurricane activity hit a minimum in 2013 and the Arctic sea ice is increasing in area. The changing global average temperatures has very little to do with the concentration of greenhouse gases in our atmosphere.
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Tom Curtis at 09:25 AM on 23 November 2013Most of the last 10,000 years were warmer
steven foster @34, where you to take the effort with the actual data, a very useful graph would be the full holocene record from Alley et al overlaid with the 100 year average from Kobashi et al for the last 4000 years, and with an inset or second panel showing the last 2000 years from Kobashi et al overlaid with the 10 averages from Box (2009). That would display the full range of data with a minimum of visual clutter and with appropriate resolutions for comparison. The first graph could also have modern temperatures marked on the graph for comparison with the full holocene record.
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Tom Curtis at 09:14 AM on 23 November 2013Clouds provide negative feedback
Licorj @250, by "estimate", it is meant estimate based on empirical observations and predictions from models. Both, separately, suggest that a small positive cloud feedback is more likely than not. The uncertainty is large so that negative feedbacks are not excluded, but neither are large positive feedbacks excluded.
You say that to get the true cloud feedback, we need lots of measurements around the world. Those measurements have been done. Three examples of such measurements are linked to in the OP. Unfortunately the measurements do not tightly constrain the result because the feedback is complicated and the observational data is noisy.
Of course, it is always possible to avoid the whole issue by looking at empirical estimates of the net feedback from historical and paleo data. These overwhelmingly suggest a large net positive feedback. As these are estimates based on what has actually occured on the Earth, they of necessity include all feedbacks. Therefore, if the cloud feedback does in fact turn out to be negative, that merely means that some other combination of feedbacks is more strongly positive than currenly estimated.
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danielc at 05:39 AM on 23 November 2013Will extreme weather like super typhoon Haiyan become the new norm?
There's another factor of anthropogenic global warming that I have not seen mentioned, which is lapse rate, i.e. the temperature gradient between sea level and tropopause.
One of the key factors identifying AGW as distinct from milankovitch or solar-flux-driven global climate change is the fact that the earth is warming "from the inside out" -- specifically, the troposphere is warming at the same time that the stratosphere is cooling.
this change increases the gradient between warm floor (ocean and land) and cold ceiling (tropopause or base of stratosphere).
That increased gradient should cause increased rates of updraft, lower surface pressures, higher/taller storms with greater lateral extent, and stronger surface winds as a result of all of the above.
One thing I do not know is how well constrained are measurements (if any) of lapse rate change, specifically in the tropics.
Anyone know?
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Clouds provide negative feedback
Licorj - I would suggest following the links in the opening post; there is considerable evidence for a small positive cloud feedback based on observations, on constraints from other forcings and feedbacks, from paleo evidence, etc.
Not a "game", not a guess - a small positive feedback comes from the best estimates of the various evidence available.
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steven foster at 05:12 AM on 23 November 2013Most of the last 10,000 years were warmer
Yeah the resolution is really low because all I did was capture Easterbrook's graph and use photoshop to clone the entire thing over by 50 years so it correctly ended at 1855, and then I added the modern part by plotting about 30 data points from GRIP, and then played connect the dots with photoshop. I'm thinking of redoing it by plotting all the data on a spread sheet, but there is a lot of work involved.
Yeah, the rise is so steep you can't really see the sawtooth pattern from the falling temps and rising again, which happens twice, first from around 1850 to 1910, then from 1942 to 1975 (steep rise 1780 to 1850, 1910 to 1942, and 1975 to 2000).
To be useful and scientificaly rigorous I should replot all the data, with all the GRIP data in a different color, with the y axis marked on the right side with actual GRIP temperatures, and GISP2 temperatures marked on the left side, lined up so the 1855 data in both sets was the same on the y axis. For this discussion, I thought what I did was good enough, because everything is so compressed.
Moderator Response:[JH] Duplicate post deleted.
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Licorj at 04:48 AM on 23 November 2013Clouds provide negative feedback
Dear KR,
First, thank you by attention, even after long time past from publication of this post. I just have realized it, after my post was sent.
I have read the post, and a lot of very interesting comments. "Clouds are estimated be small positive feedback". Ok. Estimated to be, but could be estimated to not to be... It is a game.
Excuse me by error on "INFINITE WARMING". It is clear that is not possible, otherwise, we would have free energy generation.
Backing to the clouds: I believe, of course, with less scientific based knowledge than you, that the choice on small positive feedback for cloud, taken by climate scientists was just a choice, with high level of uncertainty. So high, that choice would be NEUTRAL, or small negative feedback. In order to get the true cloud feedback, it would be need a lot of measures taken around the world, on entire troposphere, entire world, during long time. Of course it is very expensive and hard to do, maybe impossible.
Even assuming my mistake on INIFINITE WARMING, I still believe that oceans would be expected to dry, because of positive feedback, in any level.
Other expected result from feedbacks for, aerossols, cloud, water vapor, CO2, CH4, etc, would be the accuracy of models on recreating paste climates. They are all wrong, on this task. Somethings are very wron with them, and nedd to be fixed, before can tell us how will be the climate after 100 years from present day.
Why we see tomorrow's weather forecasts, and believe on it ?
Because they are correct on vaste majority of times. It is not the same case for climate models, at least, untill now.
But, this is off-topic.
Moderator Response:[JH] Since you have provided absolutely no specific evidence to substantiate your sweeping assertions about global climate models, your assertions are merely your opinion - which carries virtually no weight on this site.
If you post similar comments in the future, they will be summarily dismissed for violating the SkS Comments Policy re sloganeering.
Please read the SkS Comments Policy and adhere to it.
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rocketeer at 03:19 AM on 23 November 20132013 SkS News Bulletin #17: Cowtan and Way (2013)
@will If we were at 8.5C above pre-industrial half the planet would be dead. We are about 0.8C above pre-industrial so 0.07C is a pretty significant (additional) increase over a 15 year period.
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Tom Curtis at 23:33 PM on 22 November 2013Most of the last 10,000 years were warmer
steven foster @32, the problem is that the GRIP temperature you plotted onto GISP2 is that from Box (2009) as displayed by Kobashi et al. So, when we compare Box (2009) in Kobashi et al (middle panel, black) with your extension of GISP2 we see the uniform rise in temperature is not a feature of the data, but only a consequence of the very low resolution of your graph. The data clearly shows a rise in temperature to mid twentieth century, a fall, then a rise again, details that are missing from your graph. Therefore your extension does not show the details significantly better than the straight line, and the supposition that it might is deceptive.
And that is why there is no substitute for showing the "chicken scratch graphics". They actually show the data accurately. If you want to trim it down, show only the middle panel, but don't pretend that showing a less accurate ice core temperature series together with an instremental based series at two low a resolution to show relevant detail is a substitute for showing an accurate graph. It isn't.
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steven foster at 21:32 PM on 22 November 2013Most of the last 10,000 years were warmer
I see a significant difference in that in my chart, we can see the slope of the line in the 1700s and 1800s is equal to that in the 2000's. Your chart merely connects 2 points and has a straight line from 1855 to 2009, the slope in each century not being discernible.
I already addressed Kobashi et all in post 30, when I mentioned useless chicken scratch graphics.
Moderator Response:[JH] Please lose the snark.
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Dikran Marsupial at 19:35 PM on 22 November 2013Global warming since 1997 more than twice as fast as previously estimated, new study shows
SASM wrote "Dikran @54: What are the “other issues” with UAH and RSS?" Thes issues are well documented, for example see the ReadMe file provided with the dataset. If you look at the Wikipedia page for the UAH dataset you will find a section on the corrections that have been made. There comes a point where you need to take some time to investigate these issues for yourself after they have been pointed out to you (as I did here), Google is a useful research tool (especially Google Scholar).
SASM then goes on to write "...I’ve researched the difference between UAH, RSS, GIS, HADCRUT, and for the most part the plots are all very similar..." in which case why should C&W just use satellite data?
SASM wrote "You mention surface temperatures versus lower troposphere air temps, but what about ocean temperatures (surface and deep) -- which one is most important or the most meaning with respect to AGW?"
This is evasion. You asked why satellite data is not used, and I answered your question, yet rather than acknowledge your question had been answered you change the topic. This is trolling.
As to why near surface air temperatures are important, well that is where most of us tend to live, and our crops etc. Again this is just another example of goal-post shifting that we have seen rather too much of from you.Lastly SASM writes " But clearly, the Artic has warmed way more than the Antarctica region. I just find that very curious. I wouldn’t expect CO2 to cause such asymmetrical warming, so it seems to me that something natural phenomenon is occurring. Perhaps this is support for Judith Curry’s Stadium Wave theory?"
So you completely ignored the reason for the assymetry that I explained in my posts. Frankly that is pretty shabby behaviour on your part, and I will continue the discussion no further and I suggest others do likewise.
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Tom Curtis at 18:30 PM on 22 November 2013Most of the last 10,000 years were warmer
steven foster @30, I did not suggest you counted pixels. Rather, I did, and by doing so showed the difference to not be appreciable. For those unsure on that point, here is the graph with the data misplaced on the x-axis as noted by Foster @27:
And here is Foster's version:
Can you see a significant difference?
That aside, you (Foster) do not address my point (2) above, ie, that we should be using Kobashi et al (2011) for investigating north central greenland temperatures.
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ajki at 18:19 PM on 22 November 2013Global warming since 1997 more than twice as fast as previously estimated, new study shows
"Issues" /wrt satellites:
A good starting point to explore issues with satellite data is provided right here on SkS:
Satellite measurements of warming in the troposphere (last update 24 March 2011 by Glenn Tamblyn)
The sections named "Further reading" should be noted.
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ajki at 17:55 PM on 22 November 20132013 SkS News Bulletin #17: Cowtan and Way (2013)
re: "Media ignore study...", Media Matters, Nov 18, 2013
I don't think this is true. In a way it is "faux news" as in "Faux pause: Media ignore study..." (as the complete title of that article tells). John Hartz wrote in a comment: "The [cited] articles contained in this bulletin are only the tip of the iceberg..." and he is more than just right on that one. In Germany, mainstream media (including Radio/TV features) did report about the findings of the study - e.g. Süddeutsche Zeitung Nov 15, Der Spiegel Nov 15, Berliner Morgenpost Nov 14, T-Online News Nov 16, Telepolis Nov 20 and many, many more (not even mentioned are Blogs). As it needs just one (big) News Agency (Reuters, AFP or the like) and one short news snippet there to get a news item into the worldwide news flow, it is highly unlikely that US media did not cover this.
One part of the general problem regarding AGW is that it is just so easy today to get a message into the media and this is a well known and heavily (mis)used fact from the Denialistas. Media outlets are quite happy to push any news in "controversial" areas (that is, content generating furious reactions from readers) and they will not let down on that.
Moderator Response:[JH] The Media Matters analysis focused on the MSM coverage of Cowtan and Way (203) within the U.S.
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steven foster at 16:55 PM on 22 November 2013Most of the last 10,000 years were warmer
I assure you I didn't count pixels or use a graphics program. I plotted GISP2 for the whole Holocene and plotted GRIP on a uniform timeline from 1855 to 2009 by simply starting with the 1857 GRIP temp which was quite a bit warmer than the 1855 GISP2 temp, and plotted from there. I generally don't like to splice different data sets together but this is only a blog so who can it harm? The resolution is low and this is not publishable but gives us something better than the useless chicken scratch graphics I've seen elsewhere. This differs little from what you did on post 15. My attempt at doing the same thing.
https://imageshack.com/i/05m9hzj
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One Planet Only Forever at 15:56 PM on 22 November 20132013 SkS News Bulletin #17: Cowtan and Way (2013)
This 'better understanding' has prompted new attempts to discredit the science and anyone who tries to more fully present it. These attempts to discredit also help 'better understand' who is genuinely interested in 'better understanding this issue' and who would prefer to have people 'maintain certain popular beliefs so that gambles on damaging and unsustainable pursuits can get maximum payout'.
The popularity of benefiting from burning fossil fuels, something that clearly can't be continued by future generations for the few billion years humanity could enjoy life on this planet, makes this a significant public perception battle ground issue. There are many other pursuits that are similarly damaging or not sustainable. If this incredibly popular unsustainable and damaging pursuit, burning fossil fuels, actually loses the public opinion war among those who benefit most from it, then the rest of the unsustianable and damaging pursuits that many among the most fortunate have gambled on getting away with would likely fall as well.
The result would be a massive change of the global socioeconomic system. It would be a change for the better, except for those who only care about getting the most benefit they can for themselves. There would be massive 'disappearances of unjustified wealth related to unsustainable and damaging pursuits'. That is the clear motivation of the attacks on the science's implications that the burning of fossil fuel must be dramatically reduced.
Keep up the good work that helps everyone better understand this issue. It makes it harder for the uncaring to excuse their attitudes and actions. However, the will to fight against the required change is clearly very strong. Some people will never accept a 'better understanding if it means they can't benefit as much as they wish to'.
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2013 SkS News Bulletin #17: Cowtan and Way (2013)
The total change in temperature is very small - the Cowtan and Way data remains within the 95% uncertainty range of HadCRUT4. Changes in yearly variations, though, do affect extremely short term trends.
All of the 'skeptic' noise about the "hiatus", discussions of "16 years", and in fact any trends derived from start points in the 1998 El Nino, deliberate selections of periods just short of statistical significance - are simply noise about noise. Trends over that time, as the authors of this paper point out, are just not statistically significant and don't have enough data to separate between short term variations and any change in climate trends.
That said, the Cowtan and Way paper makes the various skeptic/denier claims about slowdowns even less sensible. Which is why the 'skeptics' are up in arms (WUWT has something like 8-9 posts on the subject) - the paper removes one of their favorite misleading rhetorical points.
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Tom Curtis at 14:36 PM on 22 November 20132013 SkS News Bulletin #17: Cowtan and Way (2013)
wili @1, you have it exactly right. This is, at most, a minor adjustment on the long term surface temperature trend. It only appears consequential when you look at very short term trends, such as that from 1998. Looking at such short trends is largely meaningless in science because the trends do not statistically differ from the long term trend, and any adjustment that makes a noticable difference only to those short term trends will be largely inconsequential to the overall science.
The problem is, in order to avoid the implications of the science, AGW deniers have been focusing heavily just such short term trends. That focus of theirs is shown by C&W to be misguided in that the phenoman they purportedly draw attention to largely disappears with just a minor correction. Indeed, they are in a cleft stick if looked at logically. If they draw attention to the minor nature of the correction, they at the same time draw attention to the unscientific nature of their focus on short term trends. Alternatively, if they draw attention to the short term trend, C&W shows their argument to be based on using only restricted data.
Of course, AGW deniers are not logical. So, whether C&W punctures their rhetorical bubble remains to be seen.
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scaddenp at 14:34 PM on 22 November 2013Will extreme weather like super typhoon Haiyan become the new norm?
CSIRO researchers Church and White have long publishing history from analysis of worldwide tide gauge and satellite sealevel. See for instance here for "Sea-Level Rise from the Late 19th to the Early 21st Century". I would imagine it comes from that group.
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wili at 14:25 PM on 22 November 20132013 SkS News Bulletin #17: Cowtan and Way (2013)
Wow, lots on the C&W paper here. The main thing I would like to know (so I can clearly and accurately convey it to others) is: Exactly how much additional warming does the study suggest we have experienced.
In the fifth paper cited, the quote: " 0.12 degrees Celsius between 1997 and 2012 (see the bold "Global" line in the graph above) -- two and a half times the UK Met Office's estimate of 0.05°C" suggests that there is an additional .07 degrees of warming we should add to the total. But that seems more like a rounding error than a major adjustment. Had we been at 8.5 Celsius above pre-industrial, or so before this reanalysis? So are we now acutally closer to 8.6? Or is there something more dramatic that I'm missing?
Moderator Response:[JH] The articles contained in this bulletin are only the tip of the iceberg so to speak. Similar articles have been written and published in many languages other than English throughout the world.
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Tom Curtis at 14:04 PM on 22 November 2013Will extreme weather like super typhoon Haiyan become the new norm?
Terranova @29 you cannot tell how high the storm surge was just from one video. You have no idea how close the house shown was to the shore, nor how far above the waterline. Nor, for that matter, do you even know which city it was in; nor the state of the tide at the time it hit. The numerical information I have been able to find puts the storm surge at Tacloban at 6 meters (19.7 feet) in one instance, 17 feet (5.18 meters) in another, and at 5 meters (16.4 feet) in a third. That compares to predictions of up to 7 meters (23 feet). These figures, however, are hardly authoritative.
Further, your appoach to estimateing the impact of global warming on storm surges is dubious. Landfalling tropical cyclones make a sparse and noisy data set. As the increased height of storm surges due to global warming will just be the increase in sea level due to global warming, it is far better to just use estimates of that increase, either observational (for current data) or predicted (for the future). Predicted sea level rise is going to be around 750 mm (2.5 feet) with no mitigation. That is the global average, and will be significantly greater in the tropics. The effect of an additional 2.5 feet on top of the Haiyan storm surge would depend on your exact location. Where the land has a shallow gradient, it will greatly increase the area effected. For those near the shore, it may make no difference at all, in that dead is dead. For those at 4.5 meters above sea level, it may turn a dangerous and damaging flood into a life threatening torrent that destroys all before it. In no case is it a good thing.
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Will extreme weather like super typhoon Haiyan become the new norm?
wpsokeland - Your claim that tropical storms "...put energy into the oceans rather than take it out" is utterly wrong, and in fact backwards. I would suggest you look at any reference on tropical storms, such as this one, and read about what really happens - heat from the oceans drive the storm, moving energy into cooler air above:
"...warm, moist air from the ocean surface begins to rise rapidly, where it encounters cooler air that causes the warm water vapor to condense and to form storm clouds and drops of rain. The condensation also releases latent heat, which warms the cool air above, causing it to rise and make way for more warm humid air from the ocean below."
The rest of your post is equally baseless. I am puzzled as to what you thought to accomplish by posting such nonsense.
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Terranova at 12:23 PM on 22 November 2013Will extreme weather like super typhoon Haiyan become the new norm?
SCADDENP - Thanks for the info. I have not been able to find that. Do you know where CSIRO mines their data from?
ALBATROSS - Thanks again for another excellent graphic. As a survivor of Hurricane Hugo in 1989 with its 18 ft storm surge, I will not diminish the impact of any tropical storm. I do want to see the official data on the storm surge. The best I can tell is that it is less than 6 feet. Again, that is preliminary. Also, has anyone considered the subject of subsidence in the region? Look up the work of Dr. Lagmay Investigating ground deformation and subsidence in northern Metro Manila in that region of the world.
My overall point is literally: how much SLR has occurred (whether a combination of SLR and subsidence, or not), and what was the realistic storm surge? Once we know those numbers we can input the data and begin to compile data over a period of time to determine any statistical signficance of any of these events.
Before we begin any "immediate action", we need to make sure we are doing it for the right reasons.
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Tom Curtis at 12:07 PM on 22 November 2013Most of the last 10,000 years were warmer
steven foster @27 & 28:
1) The chart in my post @ 15 does in fact place the end of the GISP2 data in 1874 (based on pixel count), or five pixels prior to 2010. Placing it six pixels prior to 2010 would have placed it in 1847, a little more accurate but hardly consequential. I doubt it makes any visual difference.
2) I am not sure why you are making this point on the original Alley et al (2000) data when we have the Kobashi et al (2011) data from the same ice core that is:
- Carried through to a more recent date;
- At a higher resolution;
- Includes reconstructed site temperatures from nearby instrumental readings back to 1840
- Includes on site instrumental readings back to 1985
- Is correctly alligned.
Using the Kobashi data we see the warming at the GISP2 site started circa 1750, and was quite slow till the early twentieth century. It then shows a rapid increase, and decline, followed by another rapid increase of equal size.
3) All of this is largely irrelevant because local proxies are not global proxies. Anybody using the denier talking point you mention must be ignoring that basic fact. What the Kobashi reconstruction shows us are the temperatures at one site in Greenland. The do not show us Arctic temperatures in general, and certainly not NH or global temperatures in general. In fact, we do in fact have NH and global temperature reconstructions over that period, which show the twentieth century warming to be much faster than the prior warming as the Earth exited the LIA.
Faced with that fact, the question those rejecting AGW need to ask themselves is, why, after the Earth warmed enough to exit the LIA did it keep on warming? Indeed, why did it not only keep on warming, but warm faster? If the late twentieth century just represented a "recovery from the LIA", why did it not slow down as it approached the prior equilbrium level, but instead accelerated past it?
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Tom Curtis at 11:42 AM on 22 November 2013Global warming since 1997 more than twice as fast as previously estimated, new study shows
It is astonishing that people persist in vaunting the accuracy of satellites temperature data relative to surface temperature data. Satellite temperature data does not suffer from urban heat island effects, for example, but it does suffer from instrument heat island effects. It needs numerous corrections for change of instruments having gone through multiple satellites over the years. It also requires a set of very difficult calculations to convert instrument readings of microwave radiation from O2 into temperatures. There are no a priori reasons to assume that satellite temperature data is more accurate than surface data. Indeed, as it involves more corrections, and more processing than does the instrument record, the opposite is true.
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Tom Curtis at 11:34 AM on 22 November 2013Will extreme weather like super typhoon Haiyan become the new norm?
chriskoz @11, the situation with regard to bush fires is complicated. First, there is no doubt that one (at least) of the recent fires in NSW was lit by an arsonist, and another by the Army in a live fire excercise. Absent such human activity they would not have occurred. Of course, most fires in Australia prior to white settlement were lit by humans as part of Aboriginal land management. Further, there is little doubt that increased habitation in the blue mountains increases the risk to property and lives from bush fires. Against that, past equivalent fires were not combated by tenders, fire retardant chemicals and helicopters, or large scale back burning. Overall, not climate anthropogenic factors have probably decreased the risk of fire at any given location, although that is far from clear.
What is clear is that if you increase rainfall in wet periods, and decrease rainfall and increase tempertures in dry periods, you will get more fuel for fires, which will be in a drier more ignitable state come fire season. That is what happened this year, and is a prediction for the east coast of Australia - ie, that part of Australia most influence by ENSO. I don't think the science supports any stronger claim with regard to bushfires in Qld, NSW and Victoria. It is also probable that bushfires will decline in the top end (NT, norther WA) as stronger monsoons coming further south green the environment; and decrease also in southern WA where overall drier conditions will support less plant life (not many bushfires in a desert). Bushfires will likely increase in Tasmania as it also dries, but not sufficiently to remove fuel.
In any event, the bushfire debate was not like the flood debate in that in the Brisbane flood, victims were being blamed despite an overwhelming preponderance of measures taken to mitigate floods. Indeed, even residents of Toowoomba (on top of the range) were blamed for choosing to live in a flood plain (!?!). In contrast, some anthropogenic activities beyond climate have increased the risk from bushfires in Australia, and it is reasonable to point that out. It is not reasonable to insist that the impact of climate (as in the bolded sentence above) is not occurring; or to insist that it is immoral to mention it (the first response when the issue was raised). In fact the vehemence with which public figures from the PM on down repudiated that obvious fact surprised me. That they cannot concede something so obvious, and insist on vilifying those who say no more than that bodes ill for Australia.
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scaddenp at 11:20 AM on 22 November 2013Will extreme weather like super typhoon Haiyan become the new norm?
Lets break this down:
"TC have nothing to do with global warming". This article presents a case, backed by references for way GW impacts on cyclones and there effects. What is the basis for your assertion?
"The put energy into oceans" - This would be contrary to both physics and measurement overs decades. Please back the extraordinary assertion.
"High activity has melted sea ice". Actually both are just result of global warming. By what physics do you propose that TCs melt arctic ice? Your evidence?
"Low TC activity in 2013". I think you mean low Atlantic TC activity. But if you assertion is correct, then shouldnt sea ice increase in every low TC year and not just 2013?
"Solar storms create TCs". Just got to supporting evidence for this!
"We are going to have a cold winter". Who is we? With ENSO still neutral, I wouldnt bet of a NH cold winter, but its a fair bet that jet stream behaviour will give some unusually cold and some warmer. On other hand, more arctic sea ice might bring back some normality to the jet streams.
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Tom Curtis at 11:15 AM on 22 November 2013Will extreme weather like super typhoon Haiyan become the new norm?
William @18, it is more complex than that. Extreme events of similar magnitude will, above a certain threshold, cause more expensive property damage in industrialized nations than in the third world. They will, however, cause fewer deaths and injuries, and less disruption of services. The threshold exists because, in simple terms, a wind that will demolish a corrugated iron shanty shack is likely to leave a brick house undamaged. Indeed, there will always be less property damage in the industrialized world for equivalent storms, but the property damage that occurs will cause greater financial losses. Personally, I think the industrialized world wins on that equation. So do most storm survivors, who are oftern heard saying "You can rebuild houses, you can't rebuild lives."
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Tom Curtis at 11:08 AM on 22 November 2013Will extreme weather like super typhoon Haiyan become the new norm?
wpsokeland @22, cyclones take energy out of the ocean, as is proved by how quickly they dissipate over dry land or cold water. Beyond the first sentence of your post you disappear into pure gobbledigook. As it all depends on the false first claim, there is no need to respond in detail.
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Tom Curtis at 11:05 AM on 22 November 2013Will extreme weather like super typhoon Haiyan become the new norm?
Agnostic @20, the Barrow Island wind gust occurred during a tropical cyclone, but was an individual gust, not a sustained one minute gust as recorded on the chart. On the other hand, the gust recorded in Oklahoma was from a tornado.
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Philippe Chantreau at 10:39 AM on 22 November 2013Will extreme weather like super typhoon Haiyan become the new norm?
wpsokeland, you may not have read the comment policy or perhaps you're not familiar with this site. Assertions must be backed up, peer-reviewed science articles are best for that. A statement of fact like "High activity since 1974 has created the warming trend an melted the Arctic sea ice" has no value unless it is backed up by science. Same applies to bascially every sentence of your post. You also need to make an argument that is internally consistent: the first sentence of your post is in contradiction with the third one.
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wpsokeland at 10:26 AM on 22 November 2013Will extreme weather like super typhoon Haiyan become the new norm?
Tropical cyclones, TC, have nothing to do with global warming. They put energy into the oceans rather than take it out. High activity since 1974 has created the warming trend an melted the Arctic sea ice. This year, 2013, we had low TC activity and the Arctic sea ice increased fast enough to trap some pleasure vessels. Solar storms create TCs. They come from the sun. We are probably going to have a cold winter. If the sunspots dissapear on the sun, we will have less TCs and overall colder weather.
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Philippe Chantreau at 10:24 AM on 22 November 2013Will extreme weather like super typhoon Haiyan become the new norm?
Agnostic, these numbers seem very unlikely to be corresponding to any kind of tropical low pressure system. Small scale phenomena can muster violent winds but the total energy contained in a system thatnears 1000km in diameter is what is at issue here.
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Riduna at 10:11 AM on 22 November 2013Will extreme weather like super typhoon Haiyan become the new norm?
The list of the 13 strongest tropical cyclones at landfall appears to be incomplete, since it does not include either of the following, which incidentally are the highest wind velocities ever recorded:
407 kph recorded at Barrow Island, Australia, Apr. 1996
484 kph recorded in Oklahoma, USA, May 1999.
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scaddenp at 09:48 AM on 22 November 2013Global warming since 1997 more than twice as fast as previously estimated, new study shows
SASM, since Manabe models in 1992 were predicting cooling, then isnt that a hint that there is more going on in climate than just CO2? As Dikran said, that's why we build models. I frankly dont expect a plateau at 2000m to respond the same way as seaice at sealevel, but other factors in Antarctica is the circumpolar circulation which isolates the continent (whereas arctic amplification is in part due to circulation); and ozone depletion.
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StealthAircraftSoftwareModeler at 07:52 AM on 22 November 2013Global warming since 1997 more than twice as fast as previously estimated, new study shows
Dikran @54: What are the “other issues” with UAH and RSS? I’ve researched the difference between UAH, RSS, GIS, HADCRUT, and for the most part the plots are all very similar. While satellites have a wider swing up and down, they all tend to match fairly close. I would not expect a perfect match because each measurement system is measuring different things and locations and at different times.
You mention surface temperatures versus lower troposphere air temps, but what about ocean temperatures (surface and deep) -- which one is most important or the most meaning with respect to AGW?
Since air has such low heat content, I wouldn’t think air temps would be all that important and shouldn’t be the driver of much of anything. Just look at air temperatures in California – on the coast the cool Pacific ocean brings cool air across the land in the sea breeze, but the air doesn’t have to go very far before it gets very hot. The solar energy hitting the ocean and the land is the same. The ocean doesn’t warm quickly, so the cool water from Alaska remains cool for a long time, and cools the air. But the land warms quickly, and hence warms the air in just a few miles. The air temps in Los Angeles on the coast are 60 degrees F and 20 miles inland the air rapidly warms to 100 degrees F. Clearly, in this case, the ocean or land surface temperatures completely control the air temperatures. Since air temperatures can change a lot and quickly based on surface temperatures, I would think measuring lower troposphere with satellites would be the most accurate since it measures more points more frequently.
scaddenp @55:” What is the basis of your claim of cooling?” All the blue and darker green area in Cowtan and Way’s map posted in this article. I just eye-balled the data -- I didn’t integrate it and I understand that there are some odd map projections issues; this is just a vague observation on my part. But clearly, the Artic has warmed way more than the Antarctica region. I just find that very curious. I wouldn’t expect CO2 to cause such asymmetrical warming, so it seems to me that something natural phenomenon is occurring. Perhaps this is support for Judith Curry’s Stadium Wave theory?
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michael sweet at 07:32 AM on 22 November 2013Will extreme weather like super typhoon Haiyan become the new norm?
Franklefkin:
The steroids in baseball example shows how it is difficult statistically prove the effect of change. A baseball player hits 20 home runs one year without steroids. The next year he takes steroids and hits 30 home runs. You cannot state with confidence that any single home run was hit because of the steroids, but normal people realize that the steroids have influenced the result.
Here is a list of New York Hurricanes going back before 1800. When I read it I see no landfalling storms that were hurricane strength in October. Hurricane Sandy is described as:
"The largest hurricane ever recorded in the Atlantic Basin [just before landfall], wind gusts topped 100 mph in some parts of the New York Metropolitan area."
Please provide a description of a comparable storm in October within 500 miles of New York. This list of New England hurricanes convienently lists the strength of the storms at landfall and lists no hurricanes in October. Hurricane season lasts from June to November in the Carribean sea, where it is warmer. Your assertion that hurricane season lasts until November in New York is "simply not true". It used to be too cold to support hurricanes in New York at the end of October.
James Hansen has shown that most (over 95%) of hot summers are caused by AGW. There is still debate over individual hot events. That does not mean that the individual hot events were not caused by AGW, just that it is difficult to prove. It is very difficult to prove individual events.
The recent tornadoes in Illonois are extremely rare. Jeff Masters states:
Sunday's outbreak will probably rank as the second to fourth most prolific November tornado outbreak since 1950. But what was really remarkable about the outbreak was how far north it extended. With three confirmed tornadoes on Sunday, Michigan has increased its total number November tornadoes observed since 1950 by 50%, from six to nine. Prior to Sunday, Indiana had recorded 57 November tornadoes. That total increased by 26 on Sunday,"
Although he adds that the record is too short to statistically prove anything. How many of those home runs were hit after the steroids?
I claim that extreme events have become so common that normal people now recognize them. Ten years ago only perceptive people who measured carefully (like James Hansen) noticed them. Now, they are obvious but difficult to prove statistically. Your claim that most people do not recognize these as unusual events is simply incorrect.
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Clouds provide negative feedback
Licorj - See Does positive feedback necessarily mean runaway warming. That would only be true with a feedback gain >1, which means that any increase would have an infinite effect. In reality, the law of diminshing returns means that feedbacks of a physical scale are of gain <1, with the total change in temperature being:
Total T = ΔT / (1-g)
and with the positive feedbacks providing a limited scale of amplification for any temperature change. For the current sensitivity estimate of ~3C per doubling of CO2, with an initial ΔT of ~1.1C, the gain 'g' is about 0.63.
Now as to clouds, if you have actually read the opening post (I suspect you have not), clouds are estimated to have a small positive (amplifying) contribution to the total sensitivity.
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Kevin C at 07:07 AM on 22 November 2013Help make our coverage bias paper free and open-access
OK, it looks as though my card has been charged (on the second attempt), so hopefully we're getting there.
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Licorj at 07:04 AM on 22 November 2013Clouds provide negative feedback
If clouds feedback were positive, we would expect:
Infinite warming, until oceans become dry.
It never has occurred in the past, even with a warmer earth.
IPCC's Climatologists should say:
We don't know everything about clouds. We need study a lot to understand the entire process. When we are sure, we are explaining step by step, showing with controlled laboratorial experiments, and calculation memory. When we can explain in details how to trigger an ice age, and an interglaciation era, we are ready to define positive or negative feedback for clouds. By now, we are closing our mouth about global warming or cooling.
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steven foster at 06:34 AM on 22 November 2013Most of the last 10,000 years were warmer
Sorry I meant GISP2 not GRIP2.
Also, I realized the 1.44 is not the full extent of the rise. That's only 1855 to now. If we go back to the beginning of the bend it's closer to 2 whole degrees C.
I understand polar temp rise will be higher than global. But I think the 0.8 degree C figure that we always hear for global warming period is low if we include the entire rise, if taken back to 1780 like this. I have many documents, written in the early 1800's, that describe a warming climate, melting glaciers, rising sea levels, etc. in the early 19th century.
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steven foster at 06:26 AM on 22 November 2013Most of the last 10,000 years were warmer
This is quite a thread, I just spent 45 minutes reading and studying through it.
Post 15 brings the GRIP2 chart to modern times using information from the GRIP site, by adding 1.44 C to 1855, but doesn't move the chart over to the left 50 years. I did that myself just now, lining up the chart so the end of the GISP2 data correctly lines up over 1855 rather than 1905.
What I find by doing that is, the modern warming period must have started quite a bit earlier than we normally understand, at least in Greenland. I've been under the assumtion that modern warming started around 1830 to 1840 or so, as many believe. But the data presented on this thread shows 1780 or 1790. The beginning of the modern hockey stick on the revised Easterbrook (editied for 1855-2013 by Tom Curtis here and moved over 50 years by myself (sorry I don't know how to post that here) the temperature appears to bend upwards in the late 1700's, perhaps 1780.
So, we have a long hockey stick with a 1.44 degree C rise from 1780 to now, with roughly the same slope throughout the whole 230 year period. 1780 is long before humans started making much CO2. This thread debunks the 10,000 claim of Monckton, Esterbrook, etc., but adds a new talking point for the deniers to use.....why did modern warming start in 1780?
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scaddenp at 06:06 AM on 22 November 2013Global warming since 1997 more than twice as fast as previously estimated, new study shows
"Antarctica has actually cooled". Well that is what models predicted in 1992 (Manabe) but I am not so sure how well that prediction is holding out.
Here is Antarctica temperature chance 1981 to 2007. What is the basis of your claim of cooling?
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Dikran Marsupial at 04:51 AM on 22 November 2013Global warming since 1997 more than twice as fast as previously estimated, new study shows
SASM (1) The satellites don't measure surface temperature, but temperature in vertical sections of the atmosphere, so if you want to know surface temperatures, the satellite data cannot help you. While they don't have UHI problems, they do have other issues, hence the many adjustments to the dataset that have been made over the years. Note also that the trophospheric temperatures are considerably more sensitive to ENSO than surface temperatures (hence bigger spike in 1998).
(2) The assymetry might be caused by the fact that Antarctica is land and the Arctic is ocean. I suspect the oceans buffer Arctic temperatures which prevents them from getting as cold as the Antarctic. Also the circumpolar currents in the southern ocean isolates the Antarctic a fair bit.
CO2 is not the only thing that causes temperatures to change. If it were, we wouldn't need climate models.
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Rob Painting at 04:49 AM on 22 November 2013Global Warming Paws Fails to Materialise: Earth Still Warming and Global Sea Level Rising Like Gangbusters
skymccain - prior warm periods, such as the Mid Pliocene Warm Period a few million years ago would argue against such a scenario. The reduced equator-to-pole and surface-to-deep-ocean temperature gradients back then imply that the thermohaline circulation remained vigorous (but not necessarily constant) throughout the warming. It is something I intend to write about in the future.
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StealthAircraftSoftwareModeler at 04:43 AM on 22 November 2013Global warming since 1997 more than twice as fast as previously estimated, new study shows
I have two questions, and I am surprised no one else has asked them.
1) Why not just use UAH or RSS satellite data in the first place? My perception is that the satellites are pretty accurate (once they are calibrated) and they have almost worldwide coverage. They also do not have any issues with alleged poor siting and/or urban heat island affects. Why supplement the relatively sporadic land/sea based measurements of HADCRUT4 with UAH data? UAH data shows the warmest year as 1998 and the temps have been flat since then.
2) Has anyone noticed that all of the heat has accumulated in the Artic? Antarctica has actually cooled over this time period. This seems very curious to me and I cannot think of a way this highly asymmetrical heating could be caused by a well-mixed gas like CO2.
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william5331 at 03:43 AM on 22 November 2013Will extreme weather like super typhoon Haiyan become the new norm?
In a sense, a so called developed country is more at risk from extreme hurricanes than an undeveloped country. The higher you are the further you have to fall. If you can build your house yourself from local materials, thatching the roof with palm leaves, you may recover relatively quickly. If you flood the subway with salt water, flood western houses and destroy your electrical grid, the costs build up pretty quickly. The Hurricane zone is, arguably, going to expand into temperate climes as climate zones shift north and we probably need a Philippine type hurricane to hit an American city before we will be shaken out of our comfortable paradigm. No, it won't be possible to attribute any given storm to climate change but that won't interfere with the perception amongst the public that it is so. The sooner we have such storms, the sooner we may get off our duff and start to seriously do something.
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