• As far as is known,
the record low extent of sea ice in March 2017 had no impact on polar bear health or survival.
Many conditions are unprecedented, including
the record low extent of Arctic sea ice.
The recalculations show a 2007
record low extent of 4.17 million square kilometers (1.61 million square miles).
Currently, Arcitc sea ice is at
record low extent, and Antarctic sea ice extent is at a record high extent.
This makes July only the second month so far this year that did not have
a record low extent.
After a cool Arctic summer, sea ice at the North Pole has recovered somewhat from last year's
record low extent.
Based on the last ten years, there is a 20 % chance that 2016 will be lower than the current
record low extent of 2012.
Not surprisingly, Arctic sea ice was at
a record low extent in January 2016 as well, more than 1 million square kilometers lower than the 1981 — 2010 average.
It's still possible to beat last year's
record low extent (given the current high melt rate), but probably not likely.
Dan H # 28: Not sure where you get the idea that
a record low extent is set every five years.
The record lowest extent in the 37 - year satellite record occurred on September 17, 2012 when sea ice extent fell to 3.39 million square kilometers (1.31 million square miles).
The rapid warming and increased solar radiation absorption have combined to result in younger, thinner Arctic sea ice, which therefore melts more easily, making
record low extents more likely to occur.
This initiated a period of near - record, and then extreme
record low extents that persisted until late in the year.
Not surprisingly, the Arctic ice and snow cover are responding with
record low extents.
Sea ice in the Arctic and the Antarctic set
record low extents every day in December, continuing the pattern that began in November.
No Outlook is predicting a new record this year, despite the warm winter,
record low extents for every month in 2016 except March, and evidence of thin ice in spring.
As in July, no Outlook is predicting a new record this year, despite the warm winter,
record low extents for every month in 2016 except March and July, and evidence of thin ice in spring.
https://judithcurry.com/2017/01/09/skin-in-the-game/#comment-834593 When polar sea ice has
record low extents, there is more snow and cold that follows.
Not exact matches
To the
extent that the first chart above (SPX futures) reflects a combination of Central Bank money printing and investors going «all - in» on stocks (
record low cash levels), IF the Central Banks simply stop printing money and do not shrink their balance sheets, who will be left to buy stocks when the selling begins?
The last seven years witnessed the seven
lowest minimum
extents since satellite observations began in 1979, and there was last a
record high with Arctic ice cover two decades ago, according to federal data.
In addition, the report notes that three of the warmest years on
record — 2014, 2015 and 2016 — occurred since the last report was released; those years also had
record -
low sea ice
extent in the Arctic Ocean in the summer.
The animation of satellite data shows the physical
extent of the ice cover for each of those minimum dates, ending with the
record low.
In the last three years, the sea ice's
extent - the ocean area in which a defined minimum of sea ice can be found — was at its
lowest in the 30 - year satellite
record.
The 10
lowest minimum
extents in the satellite
record have occurred in the last 11 years.
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Lowest Extent on
Record
In Antarctica, this year's
record low annual sea ice minimum of 815,000 square miles (2.11 million square kilometers) was 71,000 square miles (184,000 square kilometers) below the previous
lowest minimum
extent in the satellite
record, which occurred in 1997.
This year's maximum
extent, reached on March 7 at 5.57 million square miles (14.42 million square kilometers), is 37,000 square miles (97,00 square kilometers) below the previous
record low, which occurred in 2015, and 471,000 square miles (1.22 million square kilometers) smaller than the average maximum
extent for 1981 - 2010.
And on the opposite side of the planet, on March 3 sea ice around Antarctica hit its
lowest extent ever
recorded by satellites at the end of summer in the Southern Hemisphere, a surprising turn of events after decades of moderate sea ice expansion.
At 5.57 million square miles, it is the
lowest maximum
extent in the satellite
record, and 455,600 square miles below the 1981 to 2010 average maximum
extent.
According to a NASA analysis of satellite data, the 2015 Arctic sea ice minimum
extent is the fourth
lowest on
record since observations from space began.
This year's
record low sea ice maximum
extent might not necessarily lead to a new
record low summertime minimum
extent, since weather has a great impact on the melt season's outcome, Meier said.
This year's
record low happened just two years after several monthly
record high sea ice
extents in Antarctica and decades of moderate sea ice growth.
Arctic sea ice hit a
record low wintertime maximum
extent in 2017.
The sea ice reached its maximum winter
extent unusually early this year and has been falling fast, to a new
record low for this time of year (see graph below).
Arctic sea ice, in retreat for years, shrank to its
lowest extent in
recorded history this past summer.
Arctic Sea Ice In September, Arctic sea ice reached its second -
lowest extent ever
recorded; 2012 holds first place.
This year, sea ice
extent in the Arctic was the sixth
lowest on
record, at 5 million square kilometers on 17 September.
This year «will without a doubt» rank in the top five
lowest levels of ice
extent ever
recorded in the satellite era, and there is a good possibility that 2013 could rank second in terms of
recorded ice
lows, said Walt Meier, a scientist at the National Snow & Ice Data Center.
Despite an especially warm winter, the current
extent of sea ice does not represent a new
record low; nevertheless, the amount of ice loss is massive.
The area of the Arctic Ocean covered by sea ice in September, when the annual minimum occurs, was the sixth
lowest extent in the satellite
record, going back to 1979.
The eight
lowest extents in that
record have all occurred within the past eight years, the report notes.
The Arctic's sea ice
extent reached an all - time
low in September 2012, with the smallest
recorded extent since satellite observations began.
Arctic sea ice through Feb. 3, 2016 shows the
record low sea ice
extent in January.
The 2015 melt season will start with a
record low maximum ice
extent.
Devastating floods occurred with the Mississippi River in 2011, and this marked the start of a
record - breaking year of droughts and heat waves in the United States that stretched into the fall of 2012, as well as the
lowest level of ice
extent in the Arctic.
Both northern and southern hemispheres experienced
record breaking
low extents for the time of year.
Arctic Sea Ice to Reach Sixth
Lowest Extent on
Record
Arctic sea ice coverage is still below average and the previously stable Antarctic sea ice
extent was at or near a
record low, the statement adds.
The
lowest extent on
record came during the remarkable summer melt season of 2012, fueled in part by summer storms that moved ice into warm waters.
Furthermore, the maximum
extent reached on March 7, 2017 was the
lowest maximum
recorded yet in the satellite data
record.