Volcanoes may be responsible for most of the global surface warming slowdown
Posted on 3 December 2014 by dana1981
"A new study has found that when particulates from small volcanic eruptions are properly accounted for, volcanoes may be responsible for much of the slowdown in global surface warming over the past 15 years.
Sulfur aerosol particulates pumped into the atmosphere from volcanic eruptions cause short-term cooling by blocking sunlight. Until recently, climate scientists thought that only large volcanic eruptions had a significant impact on global temperatures. There haven’t been any big eruptions since Mount Pinatubo in 1991. However, studies published over the past few years have found that even moderate volcanic eruptions can pump significant amounts of aerosol particulates into the atmosphere.
Virtually all research into the climate influence of volcanic aerosols has used satellite measurements of particulates in the upper atmosphere (the stratosphere). These satellite measurements only monitor the volcanic aerosol at heights of 15 km and above. The new paper by David Ridley and colleagues studied the amount of volcanic aerosols in portions of the stratosphere that lie below 15 km."
http://www.skepticalscience.com/volcano ... wdown.html
Statistics: Posted by Johhny Electriglide — Thu Dec 04, 2014 5:48 pm
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Read more: http://www.smh.com.au/environment/weath ... z3HrPh1WgX
Methane Apocalypse, Everything Else Is A Distraction.
https://www.youtube.com/watch?v=6FnfygE5Lhw
Statistics: Posted by Johhny Electriglide — Sat Nov 01, 2014 7:04 pm
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Then more not good news;
Recently discovered microbe is key player in climate change
Oct 22, 2014
Recently discovered microbe is key player in climate change
Study site, Stordalen Mire in Abisko National Park in Sweden, just north of the Arctic Circle. Credit: Scott Saleska
As permafrost soils thaw under the influence of global warming, communities of soil microbes act as potent amplifiers of global climate change, an international study has shown.
Read more at: http://phys.org/news/2014-10-microbe-ke ... e.html#jCp
MORE amplifiers of CAGW
Statistics: Posted by Johhny Electriglide — Sun Oct 26, 2014 4:56 pm
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The clue is in the regularity of the fluctuations.
Scientists combined radiometric dates on volcanic ash layers with the record of Earth’s magnetic reversals and the known cycles in Earth’s orbit, to correlate the sedimentary records at the different locations. This also allowed a mathematical assessment of the correlation between the climate cycles recorded in sediments and Earth’s orbital cycles. There are 3 different kinds of orbital cycle that control the intensity of sunlight on Earth (solar insolation): eccentricity, precession, and obliquity – for more about them see this post.
The 3 papers show that the Hyperthermals and their effects were global, and were paced by orbital eccentricity on cycles of 405,000 and 100,000 years, and also by orbital precession (21,000 year cycles). The longer eccentricity cycles are associated with ocean bottom water temperature swings of up to 2-4°C (4-7°F), while the 100,000 year cycles correspond with 1.5°C (3°F) swings in bottom temperature. There’s very little contribution from the obliquity (41,000 year cycle) probably because there was very little ice at the poles at the time (unlike during the Pleistocene ice age, when obliquity was much more prevalent).
In the oceans these cycles show up as regular variations in carbon isotope ratios (reflecting carbon cycle changes) and oxygen isotope variations (reflecting ocean temperature) and the proportion of “Coarse Fraction” or Iron intensity in sediments (reflecting carbonate dissolution and sediment supply).
"This new thinking is supported by Smith et al, who concluded that the regular carbon releases in the Eocene Hyperthermals:
“...were the effect rather than the cause of global paleoclimatic and geomorphic changes during the EECO.” (my emphasis)
Littler et al’s study would seem to concur. They found that ocean bottom temperatures lead the carbon cycle by around 6 millennia for the 405,000 year cycles (less in the Paleocene, more in the mid Eocene) and about 3,000 years for the 100,000 year cycles. This indicates that the ocean carbon signal in orbitally-controlled climate change is a feedback response to orbitally-driven temperatures.
In contrast, today’s climate change is not orbitally-driven – if it were we would be experiencing global cooling, not warming. It has also taken place in a time frame just 3% of even the fastest orbital cycle.
"As was the case during the Paleocene, our modern Earth has reserves of permafrost and methane hydrates that were ‘banked’ during the cool Pleistocene ice age all the way up to the pre-industrial era. And even though some interglacials may have been warmer than the preindustrial era, deep-ocean temperatures appear to have been only slightly elevated, keeping most deep sea methane locked away - until now. A Paleocene-to-Eocene-like methane release is expected from modern climate change because the deep oceans are now warming by a magnitude unprecedented in the past several million years!
Last year Zeebe and Zachos compared the long tail of the PETM with our present human-caused global warming. They concluded that our own long hot tail will last tens of thousands to hundreds of thousands of years. But they argued that future environmental effects will:
“more likely resemble the end-Permian and end-Cretaceous catastrophes, rather than the PETM,”
due to the far more abrupt nature of modern carbon emissions and warming."
http://www.skepticalscience.com/long-ho ... ocene.html
So I guess I am just an "envirometalist" like Milton B thinks.
Statistics: Posted by Johhny Electriglide — Fri Oct 10, 2014 2:04 pm
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Jailing Climate Deniers
Robert F. Kennedy, Jr. | October 1, 2014
"Hysterics at the right wing think tanks and their acolytes at The Washington Times, talk radio and the blogosphere, are foaming in apoplexy because I supposedly suggested that “all climate deniers should be jailed.” Last week, that canard leapt from the wingnut echo chamber into New York magazine, which reported, under Jonathan Chait’s by-line, that “Robert F. Kennedy, Jr. shares the opinion that climate denial should be criminalized.” Chait was quoting the National Review’s Kevin Williamson who made that outlandish claim at one of Heritage Foundation’s annual “Conference for Kooks.” Of course I never said that. I support the First Amendment which makes room for any citizen to, even knowingly, spew far more vile lies without legal consequence.
I do, however, believe that corporations which deliberately, purposefully, maliciously and systematically sponsor climate lies should be given the death penalty. This can be accomplished through an existing legal proceeding known as “charter revocation.” State Attorneys General can invoke this remedy whenever corporations put their profit-making before the “public welfare.”"
http://ecowatch.com/2014/10/01/jailing- ... d-85901709
Statistics: Posted by Johhny Electriglide — Wed Oct 01, 2014 4:20 pm
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The predictions of AGW made in 1998 by the IPCC have not happened.
How long do we need to have no significant warming until the hypothesis of catastrophic CO2 induced warming becomes clearly disproven?
If it cools in the next 5 years by 1/2 a degree will that show that we do not need to worry?
If not what would it take?
Statistics: Posted by Tim the Plumber — Wed Oct 01, 2014 3:57 pm
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By Amelia Urry
18 Sep 2014 4:56 PM "On the tails of the hottest May, one of the worst droughts in U.S. history, some of the earliest big hurricanes ever, and just generally one of the weirdest years of extremes, we now have the hottest August on record. NOAA announced that the global temperature average for August 2014 was 61 degrees Fahrenheit. Now that’s no sauna — what do you expect, it’s already PSL-season and half the planet is still shivering through a sub-equatorial winter — but it seems especially toasty when you realize that average includes both land and sea temperatures. In fact, this was the hottest month in the oceans EVER."
http://grist.org/news/we-just-had-the-h ... gn=climate
Statistics: Posted by Johhny Electriglide — Sun Sep 28, 2014 12:20 pm
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