by Donald Rapp, Ralf Ellis and Clive Best
A review of the relationship between the solar input to high latitudes and the global ice volume over the past 2.7 million years.
by Donald Rapp, Ralf Ellis and Clive Best
A review of the relationship between the solar input to high latitudes and the global ice volume over the past 2.7 million years.
Posted in Polar regions
by Dr. Ronan Connolly & Dr. Michael Connolly
Satellite observations indicate that the average Arctic sea ice extent has generally decreased since the start of the satellite records in October 1978. Is this period long enough to assess whether the current sea level trend is unusual, and to what extent the decline is caused by humans?
Posted in Polar regions
by Judith Curry
We conclude that the observed cooling over central Eurasia was probably due to a sea-ice-independent internally generated circulation pattern ensconced over, and nearby, the Barents–Kara Sea since the 1980s. — McCusker et al.
Posted in Attribution, Polar regions
by Greg Goodman
This year, as every year, there has been much excitement in the media about ‘catastrophic’ melting of Arctic sea-ice, run-away melting, tipping points, death spirals and “ice-free” summers.
Posted in Polar regions
by Rud Istvan
Aitken et. al. in Nature newly comports to confirm 2015 fears about instability of the Totten Glacier in Eastern Antarctica. This could ‘suddenly’ raise sea level as much as 4 meters! (Or, based on the abstract, maybe only 0.9 meters in ‘modern scale configuration’, but over 2 meters [2.9-4] in unspecified other configurations).
Posted in Polar regions
Posted in Polar regions
by Judith Curry
A discussion of Section 8.3 of Alan Longhurst’s book Doubt and Certainty in Climate Science.
Posted in Oceans, Polar regions
by Judith Curry
The Washington Post has this dramatic headline: Global warming is now slowing down the circulation of the ocean with potentially dire consequences.
Posted in Attribution, Polar regions
Posted in Polar regions
by Judith Curry
The seasonal forecasts of Arctic sea ice minimum have been submitted to annual SEARCH Sea Ice Outlook
Posted in Polar regions
by Judith Curry
Rapidly melting Arctic sea ice, growing Antarctic sea ice, and concerns about the melting Thwaites glacier – can all of this be explained by anthropogenic global warming?
Posted in Polar regions
by Judith Curry
. . . suggesting that Dansgaard-Oeschger events resulted from a combination of the effects of sea ice and ice shelves—structures that help define the margins of ice sheets—to account for both the rapid and the slower parts of the cycle.
Posted in Attribution, Polar regions
by Judith Curry
“It is very likely that the annual Antarctic sea ice extent increased at a rate of between 1.2 and 1.8% per decade between 1979 and 2012.” – IPCC AR5
Posted in Polar regions
by Judith Curry
“Arctic temperature anomalies in the 1930s were apparently as large as those in the 1990s and 2000s. There is still considerable discussion of the ultimate causes of the warm temperature anomalies that occurred in the Arctic in the 1920s and 1930s.” – IPCC AR5 Chapter 10
Posted in Polar regions
by Judith Curry
The drama and the irony of the Antarctic expedition stuck in summertime sea ice.
Posted in Polar regions
by Judith Curry
The Arctic Ocean covers about 2.8% of the total Earth’s surface area – The Encyclopedia of Earth
Posted in Polar regions
by Judith Curry
Motivated by the paper by Cowtan and Way, this post examines uncertainties in the recent variability of Arctic temperatures.
Posted in Data and observations, Polar regions
by Marcia Wyatt
UPDATE: Addendum from Marcia Wyatt
UPDATE: Giff Miller responds
Miller et al.’s 2013 paper – Unprecedented recent summer warmth in Arctic Canada – splashed into the public eye last week with the declaration that current average summer temperatures in the Eastern Canadian Arctic are warmer now than in any century in the past 44,000 years, and perhaps in the past 120,000 years.
Posted in Polar regions
by Judith Curry
Chasing Ice is the story of one man’s mission to change the tide of history by gathering undeniable evidence of our changing planet.
Posted in Communication, Polar regions
by Judith Curry
It looks like the Arctic sea ice is close to reaching its seasonal minimum, reflecting a substantial increase in sea ice relative to the record breaking minimum in 2012.
Posted in Polar regions
by Judith Curry
Is the dramatic decline of Arctic sea ice, spurred by manmade global warming, making the weather where we live more extreme? Several recent studies have made this claim. But a new study finds little evidence to support the idea that the plummeting Arctic sea ice has meaningfully changed our weather patterns.
Posted in Polar regions
by Judith Curry
It will be difficult — perhaps impossible — to avoid large methane releases in the East Siberian Sea without major reductions in global emissions of CO2.- Gail Whiteman, Chris Hope, Peter Wadhams
Posted in Polar regions
by Tony Brown
Satellite observations that provide an hour by hour picture of every part of the Arctic make it easy to forget that large areas of it had not even been even explored 80 years ago – let alone its ice extent minutely observed. This paper explores the controversy surrounding the period 1920-1950, which was a period of substantial warming in the Arctic.
Posted in History, Polar regions