Climate and Weather
gregladen | September 15, 2010I've noticed that a lot of smart people who nonetheless "did not accept" AGW, or at least, denied the "A" part of it, have stoped talking about it lately. I'm speaking here of people I know personally. You know who you are, and you know you were wrong, and I just wanted to say that I forgive you. Mostly.
In the mean time, have a look at this:
That is from NOAA's new Climate Services site, where you too can mess around with the data and get the bejeebus scared out of you. Click here. If you dare.
They need a graph for pirates.
gregladen | September 15, 2010This Rob Dunbar is NOT Robin Dunbar the Archaeologist.
Rob Dunbar hunts for data on our climate from 12,000 years ago, finding clues inside ancient seabeds and corals and inside ice sheets. His work is vital in setting baselines for fixing our current climate -- and in tracking the rise of deadly ocean acidification.
gregladen | August 3, 2010In the 1960s, the whole idea of a "greenhouse effect" was well understood, and assumed to be an important potential factor in climate change. So was glaciation, and the short and medium term future of the Earth's climate was less clear than compared to now. But the basics were there ... C02 was being released into the atmosphere, this could cause a greenhouse effect, and that would warm the earth. Certainly by the early 1980s, it was possible to make some thumb-suck estimates of how much the earth would warm given various assumptions about CO2, and it was not that difficult to see that a lot…
gregladen | August 2, 2010Why does the wind blow, and why does it blow the way it does?
When I teach human evolution, I feel compelled to bring in climate change. When I do that, I find it very unsatisfying to mention climate change as a thing that simply happened. I need to also discuss how climate itself works, both now (in the present era) and generally speaking. That can be hard. There are so many variables that matter, and that if you leave out will come back and bite you later when you suddenly need them to explain something. Anyway, when addressing climate and how it works, it is very difficult to not…
gregladen | August 2, 2010
See the missing bit? That is a 1.5 kilometer retreat of the so-called "calving front" of the glacier.
In truth, this particular sort of even is not that unusual, but what is interesting is that new satellite monitoring capabilities allow researchers to notice these events more or less when they happen, as opposed to during less frequent inspections of satellite imagery.
And, there are some climate-change related features of this event.
"While there have been ice breakouts of this magnitude from Jakonbshavn and other glaciers in the past, this event is unusual because it occurs on the…
gregladen | August 1, 2010Steve Andrew dared to tickle the dragon's tail and now he is paying for it. The dragon in this case, is Climate Denialists in the Right Wing Media.
Andrew posted something about the recent, very alarming news that global warming seems to be cutting back significantly on the supply of oceanic plankton. The worst case scenario of this sort of process is, actually, mass extinction and everybody dies. There are less severe scenarios as well, but none of them are very much fun.
So yes, even as the climate chickens come home to roost, the denailists can't keep their bought and paid for (by the…
gregladen | August 1, 2010Anthropogenic global warming has been suspected for decades, and a simple one paragraph long characterization of the problem 40 years ago was substantially identical to any accurate characterization we might make today. One has to wonder why after 40 years of time we still see headlines telling us that it might, after all, turn out to be true that anthropogenic global warming is real. Indeed, it is a bit disconcerting when the inestimable climate blog RealClimate notes that this is the 35th "Anniversary of Global Warming" as a term in the peer reviewed scientific literature (though I…
gregladen | June 16, 2010In a paper that is about to be published in the Bulletin of the American Meteorological Society, researchers Andrew Heymsfield, Patrick Kennedy, Steve Massie, Crl Schmitt, Zhien Wang, Samuel Haimov and Art Rangno make the claim that "The production of holes and channels in altocumulus clouds by two commercial turboprop aircraft is documented for the first time. ... Holes and channels in supercooled altocumulus clouds can be the result of homogeneous ice nucleation induced by turboprop and jet aircraft at temperatures warmer than previously accepted for commercial aviation influences on…
gregladen | April 18, 2010It has long been thought that there are linkages between certain viruses and the weather. The flu season is winter (in whichever hemisphere it happens to be winter in) for reasons having to do with the seasons. One early theory posited that the practices of East Asian farmers, as they tended their animals, caused waterfowl and swine and humans to share space closely enough that nasty new influenzas would emerge and spread around the world. Although that explanation for the annual seasonal flu has been dropped (if it ever really had wings... or hooves, or whatever) it is still possible…
gregladen | December 21, 2009Every now and then I get out my old Blog Epic on Global Warming and dust it off. I'm thinking it is time to do it again. This is a seven part series of Global Warming that covers much of the basics. Enjoy. Or get mad at me. Whatever.
About two years ago, a sea change occurred in the way that climate change news is reported, much to the annoyance of the Right Wing. It is an axiom that in reporting science, there are two (not one, not three or four, just two) sides to every issue, and one side is the plank nailed to the Democratic Party Platform, and the other side is the plank nailed to…
gregladen | December 5, 2009Subtitled "The truth about the coming climate catastrophe and our last chance to save humanity," this might be a book you should read.
James Hansen is probably the world's best known climate scientist, partly because of his own work and his testimony before Congress, and partly because he has become a target of Global Warming denialists who seem to revel in every opportunity to accuse him of fraud, deceit, or incompetence.
In Storms of My Grandchildren: The Truth About the Coming Climate Catastrophe and Our Last Chance to Save Humanity, Hansen provides a message that is much more severe…
gregladen | December 1, 2009 It has now been proven beyond a shadow of a doubt that stuff has been made up and foisted on the American Public.
Tim Lambert has nailed it. He shows the code that was used to adjust climate data, he shows how the adjustment was made, what it was used for, and does an excellent job of explaining the whole thing.
Lies are being spread about climate change, and Lambert has nailed it. Have a look.
gregladen | November 23, 2009A warning before going any further: This blog will not be used as a dumping ground for the text of climategate related "released" emails. I have surveyed my readers and overwhelmingly have been told that people would prefer to not see that. So don't do that.
Now, on with the show...
Just two items, recent blog posts on this issue:
Real Climate: The CRU hack: Context
This is a continuation of the last thread which is getting a little unwieldy. The emails cover a 13 year period in which many things happened, and very few people are up to speed on some of the long-buried issues. So to save…
gregladen | November 21, 2009The Anthropocentric Global Warming Denialist Community is collectively creaming in its collective jeans over the release of zillions of emails that definitively prove that the whole global warming conspiracy thing was made up. Real Climate has the story:
There is no evidence of any worldwide conspiracy, no mention of George Soros nefariously funding climate research, no grand plan to 'get rid of the MWP', no admission that global warming is a hoax, no evidence of the falsifying of data, and no 'marching orders' from our socialist/communist/vegetarian overlords. The truly paranoid will put…
gregladen | October 4, 2009This is a continuation of a discussion on the role of Global Warming in the decline of moose populations in Minnesota. It is also a discussion of Global Warming denialism.
When I started to write Part II of this post, I realized that one aspect of the argument would probably distract from all the others, could be dealt with quickly and summarily, and makes a nice pithy post all by itself. This aspect is the claim made by commenter Gerard on an earlier post regarding global warming (or lack thereof) in Minnesota.
Gerard made this claim:
The average monthly high/low temperatures for January…
gregladen | September 28, 2009We have had a cool summer here in Minnesota, and this has brought out the miscreants who for their own reasons do not want to get on board with the simple, well demonstrated scientific fact that global temperatures have risen, that we humans are the primary cause, and that this climate change has negative consequences.
There are probably different reasons people do not want to get on board with this reality. The main reason especially for younger individuals is that they have been told by their political mentors to not accept global warming. The political mentors, in turn, reject global…
gregladen | September 26, 2009
What they are referring to is a paper by Mojib Latif in which he notes that the media often misrepresent global warming as a continuous, year by year increase in temperature. The truth, of course, is that annual temperature varies up and down but the baseline for this variation has been going continuously up.
Like a road going up a mountain. Often the road goes up and down and up and down cross the complex terrain of the mountain side. If, while driving up this hypothetical mountain, the road dips down for a moment, one does not say "Oh, we're going home now. This whole driving up the…
gregladen | June 9, 2009I had never felt airsick before, or since. But now I was a nauseated rag doll flopping around in the middle row of a six seater prop plane and I was ready to hurl at any moment.
BBC depiction of the path of Flight 447. I find it astonishing that the most important weather related feature on the planet is a "place where there are a lot of thunderstorms" or often not even identified at all. This is equivalent to a plane crashing into the Cascades and the news reporting that the aircraft went down in a "place with some hills" or not even noting the existence of the mountain range at all, as…
gregladen | May 23, 2009One item is just published in the Journal of Climate. Simply put, the use of some very sophisticated and probably quite trustworthy models suggests that extratropical cyclones (so this means winter storms and such, mainly) will have a good deal more precipitation in them.
In the model ...
... There is a small reduction in the number of cyclones but no significant changes in the extremes of wind and vorticity in both hemispheres. ... The largest changes are in the total precipitation, where a significant increase is seen. Cumulative precipitation along the tracks of the cyclones increases by…