ECO-CRASHING NEWS: ARCTIC ICE SUMMER MINIMUM


Alex Wierbinski's picture

By Alex Wierbinski - Posted on 09 October 2018

ECO-CRASHING NEWS: ARCTIC

6th Lowest Summer Minimum

Arctic Sea Ice Reaches 2018 Minimum,
NASA Earth Observer, September 28, 2018.

2018 Arctic Summer Minimum, NASA.
Image Credit to NASA. "Arctic sea ice as measured by satellites on September 19, 2018. Extent is defined as the total area in which the ice concentration is at least 15 percent. The yellow outline shows the median September sea ice extent from 1981–2010."

MAIN POINTS

"Arctic sea ice likely reached its annual minimum extent on September 19 and again on September 23, 2018, according to researchers at the National Snow and Ice Data Center (NSIDC) and NASA. Analyses of satellite data showed that the Arctic ice cap shrank to 4.59 million square kilometers (1.77 million square miles), tied for the sixth lowest summertime minimum on record. Researchers at NSIDC noted that the estimate is preliminary, and it is still possible (but not likely) that changing winds could push the ice extent lower."

Massive Annual Loss
"The 2018 minimum is 1.63 million square kilometers (629,000 square miles) below the 1981–2010 average ice minimum. NASA scientists Claire Parkinson and Nick DiGirolamo have calculated that Arctic sea ice has lost roughly 54,000 square kilometers (21,000 square miles) of ice for each year since the late 1970s—equivalent to losing a chunk of sea ice the size of Maryland and New Jersey for every year."

 

Bottom Line

Loss of Cold Power
How does this affect the High Sierra Backpacker? It started a long time ago, about 25 years ago, when the weakening of the Polar Vortex during Wintertime began affecting the Wintertime storm tracks out of the Northwest. The weakening Polar Vortex no longer had the power to drag tropical moisture up to its fierce edge, supercharging it, and flinging it to the Southwest towards the Sierra. Its weakening changed the storm track over the NE Pacific...

This weakening, along with equatorial heating, began shifting the character of Sierra Winters from cold storms out of the Northwest to warm storms out of the Southwest. There's typically been a ratio between the two, with storms out of the NW dominating, puncuated by the occassional, "tropical Winter." Now, most of our Winters are tropical, and typical Winters, dominated by storms out of the Northwest, are rare.

Slowdown
To this change in Winter storm tracks, we must add the effects of a slower, warmer Polar Vortex not pushing drought and flooding conditions as rapidly Eastward, allowing longer periods of drought and flooding to manifest themselves everywhere in the Northern Hemisphere. Everything is slowing down and staying in one position longer.

What happens up top affects everyone, everywhere in the No Hem, but especially those of us in the Shadows of the Sierra.

 

Truth and Consequences

Arctic Roots of Increasing Extreme Weather

 

What Happens when You Grow Too Big for your Britches? The Arctic Vortex Weakens!

 

Yup, so warm the Polar Vortex split!
Polar Vortex Splits Under Warming Stratosphere

 

Polar Vortex Effect Further Quantified, Causes & Effects

 

Warm Arctic Chills Dixie? Warming Arctic Channels Frigid Air South

 

 


Earlier

Summer 2018 Sea Ice Minimum Approaches

 

2018 Arctic Sea Ice Winter Maximum: Trend of Record Lows Continues

 

Last Year

Sea Ice Minimum and Arctic Summer of 2017 Information: End of the Summer Melt, 8th Lowest of 13 Measured

 

Big Image

2018 vs. 1981 to 2010 Average

"Arctic sea ice as measured by satellites on September 19, 2018. Extent is defined as the total area in which the ice concentration is at least 15 percent. The yellow outline shows the median September sea ice extent from 1981–2010."

 

 

More Ice Information

U.S National Ice Center

Naval Ice Center

 

 

TOP

 

 

Recent Arctic News & Research

Climate Change News: Arctic Out of Balance, Arctic Ocean Rapidly Changing

 

Arctic Water & Ice News: Fundamental Pattern Change

 

Sea Ice Minimum and Arctic Summer of 2017 Information: End of the Summer Melt, 8th Lowest of 13 Measured

 

Arctic Ice News: Mid Winter Melt of 2016 & Great Thaws of 2007 and 2012 Analyzed

 

Climate Change News: Melting Sea Ice brings California Droughts

 

Another Warm Arctic Winter?

 

 

Sea Surface Temps

 

TRACKING THE WINTER


 

 

Earlier Arctic News

Cycle of Doom

Dept of Duh

Earlier Arctic News

 

 

More than Arctic Sea Ice is Melting

The End of Cold, 2018: Arctic Mountain Glaciers Melting Rapidly

 

Arctic Lands & Lakes Radically Changing

 

West Greenland Melting: Fastest Seen in Modern Historical Record

 

 

 

 

Water News

 

 

 

 

October 2018 News of Man & Nature

 

 

 

 

 

More
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Climate Destruction News

 

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Female Trail

High Sierra History

 

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All High Sierra News

 

 

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