Category Archives: Polar regions

What can we expect for this year’s Arctic sea ice?

by Judith Curry

The seasonal forecasts of Arctic sea ice minimum have been submitted to annual SEARCH Sea Ice Outlook

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Asymmetric responses of Arctic and Antarctic

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?

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Explaining(?) abrupt climate change

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.

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Why is there so much Antarctic sea ice?

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 

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Early 20th century Arctic warming

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

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Antarctic sea ice saga

by Judith Curry

The drama and the irony of  the Antarctic expedition stuck in summertime sea ice.

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The 2.8% effect

by Judith Curry

The Arctic Ocean covers about 2.8% of the total Earth’s surface area   –  The Encyclopedia of Earth

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Uncertainty in Arctic temperatures

by Judith Curry

Motivated by the paper by Cowtan and Way, this post examines uncertainties in the recent variability of Arctic temperatures.

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Unprecedented(?) Arctic warming. Part II

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.

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Unprecedented (?) Arctic warming

by Judith Curry

Arctic temperatures highest in at least 44,000 years.

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Chasing Ice!

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.

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Inter-decadal Variation in Northern Hemisphere sea ice

by Greg Goodman

On the deceleration in the decline of the Arctic sea ice.

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Arctic sea ice minimum?

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.

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Arctic sea ice and extreme weather

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. 

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Arctic time bomb (?)

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

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Historic Variations in Arctic sea ice. Part II: 1920-1950

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.

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Future of Arctic enterprise

by Judith Curry

As a complement to the discussion on Arctic sea ice decline at Climate Dialogue, lets take a look at the outlook for the development of existing and new economic activity in the Arctic marine region, as a result of this change.

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Reflections on the Arctic sea ice minimum: Part II

Judith Curry

Pursuant to Part I, i ask the following questions:

  • Whence an ‘ice free’ Arctic?
  • Does an ‘ice free’ Arctic matter?

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Reflections on the Arctic sea ice minimum: Part I

by Judith Curry

How should we interpret the record low minimum sea ice extent?

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Economic and security impacts of climate change in the Arctic

by Judith Curry

In the long run the unfrozen north could cause devastation. But, paradoxically, in the meantime no Arctic species will profit from it as much as the one causing it: humans. Disappearing sea ice may spell the end of the last Eskimo cultures, but hardly anyone lives in an igloo these days anyway. And the great melt is going to make a lot of people rich. – The Economist

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Arctic warming opens region to new military activity

by Judith Curry

[T]he world’s military leaders . .  are preparing for a new kind of Cold War in the Arctic, anticipating that rising temperatures there will open up a treasure trove of resources, long-dreamed-of sea lanes and a slew of potential conflicts.

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Impact of declining Arctic sea ice on winter snowfall

by Judith Curry

Liu, Curry et al. have a new paper published in PNAS entitled “Impact of Declining Arctic Sea Ice on Winter Snowfall.”

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Arctic Update II

by Judith Curry

Here is a synopsis of some recent papers and other issues in the Arctic

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Likely causes of the recent changes in Arctic sea ice

by Judith Curry

A new paper by Polyakov, Kwok and Walsh is in press in the Bulletin of the American Meteorological Society, entitled: “Recent changes in arctic multi-year sea ice coverage and likely causes.”  This is the best paper I’ve seen on this topic, which clearly articulates the complexity of the issue.

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Arctic Imperative

by Judith Curry

In my congressional testimony, I discussed the idea of climate change winners and losers.   In the Arctic, where climate is changing most rapidly, will there be winners or losers?

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