Study: Greenland remained stable for 2.7 million years ‘even during the warmest periods’ – Published in the journal Science

Greenland remained stable for 2.7 million years “even during the warmest periods”

http://sunshinehours.wordpress.com/2014/04/23/greenland-remained-stable-for-2-7-million-years-even-during-the-warmest-periods/

2.7-Million-Year-Old Forested Landscape Discovered under Greenland Ice Sheet
“We found organic soil that has been frozen to the bottom of the ice sheet for 2.7 million years,” said Dr Paul Bierman, a geologist with the University of Vermont and the lead author of the paper appearing online in the journalScience.
“The ancient soil under the Greenland Ice Sheet helps to unravel an important mystery surrounding climate change – how did big ice sheets melt and grow in response to changes in temperature?” said co-author Dr Dylan Rood from the Scottish Universities Environmental Research Center and the University of California, Santa Barbara.
The discovery indicates that even during the warmest periods since the ice sheet formed, the center of Greenland remained stable.“
“Greenland really was green! However, it was millions of years ago. Greenland looked like the green Alaskan tundra, before it was covered by the second largest body of ice on Earth,” Dr Rood said.
http://www.sci-news.com/geology/science-forested-landscape-greenland-ice-sheet-01861.html

(h/t IceCap)

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Alpine Glaciers Were Of Similar Size During Medieval Warm Period, New Study Finds

Alpine Glaciers Were Of Similar Size During Medieval Warm Period, New Study Finds

http://www.thegwpf.org/alpine-glaciers-were-of-similar-size-during-medieval-warm-period-new-study-finds/

A new paper published in The Cryosphere reconstructs Alpine glacier fluctuations over the past 1600 years and finds glacier lengths of 7 Alpine glaciers were similar during the Medieval Warm Period and the end of the 20th century.
The paper uses a combination of observations shown as the black dots in Fig 1 below and modeled glacier lengths shown as the red lines. Lengths of the seven modeled glaciers are approximately the same or slightly less during the Medieval Warm Period 1000 years ago as compared to the end of the 20th century:

The author also finds a link between the Atlantic Multidecadal Oscillation [AMO] and reconstructed Alpine summer temperatures and glacier lengths. The AMO, in turn, has been linked to solar activity variation.

The Cryosphere, 8, 639-650, 2014
www.the-cryosphere.net/8/639/2014/
doi:10.5194/tc-8-639-2014

Little Ice Age climate reconstruction from ensemble reanalysis of Alpine glacier fluctuations

Full paper

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UN IPCC Scientists Licking Wounds After Governments Change UN Climate Report: ‘A strikingly large amount of scientific material was stripped out. The whole IPCC process is kind of unbelievable.’

IPCC Scientists Licking Wounds After Governments Change UN Climate Report

http://www.thegwpf.org/ipcc-scientists-licking-wounds-after-governments-change-un-climate-report/

‘A strikingly large amount of scientific material was stripped out. The whole IPCC process is kind of unbelievable.’
It has been more than a week since a U.N. panel released a major report on mitigating climate change, but some scientists who helped write a key summary say they continue to smart from some disconcerting last-minute edits.
“We are still shaking,” says Giovanni Baiocchi, an economist at the University of Maryland, College Park, whose work was central to the debates over the summary’s wording. The episode is making some researchers reconsider participating in the Intergovernmental Panel on Climate Change (IPCC) process in the future.
The 13 April release of  IPCC’s  mitigation assessment—the third of three reports—was capped by 5 days of negotiations in Berlin over the wording of the report’s “Summary for Policymakers.”It is a 33-page boil-down of key points culled from the report’s 2000 pages. Unlike the text in the body of the report, which scientists essentially control, the influential summary is the product of give-and-take with government diplomats and requires consensus.
The most contentious issue this year was whether to highlight economic groupings of nations, such as high or low income, and illustrations showing how each group was contributing to the growth of greenhouse gas emissions were particularly controversial. Below is one of the figures from the draft summary that sparked debate; it shows that emissions from lower-middle income countries (LMCs) and upper-middle income countries (UMCs) are rising faster than emissions from high-income countries (HICs).
The problem, according to some of those present, is that some nations, including China and Saudi Arabia, opposed including text and graphs that linked emissions to income levels. Saudi Arabia, which is in the high-income category, opposed mention of that category, for instance. And China, which is categorized as upper-middle income, opposed including figures that highlighted the skyrocketing emissions from developing nations.
For three of the 5 days of the talks, diplomats from dozens of countries haggled with lead scientists over the issue. In the end, five figures and whole blocks of text were removed from the summary.
“A strikingly large amount of scientific material [was] stripped out,” says David Victor, a political scientist at the University of California, San Diego.
“It is a bit disappointing that governments could not take ownership of this science, which is in the report’s chapters,” Baiocchi says. …