Climate News Network: The Arctic ice cap has just passed its summer minimum — and it's the sixth lowest measure
of sea ice recorded since 1978, according to scientists at the US space agency NASA.
Still, the extent
of sea ice recorded in November was well shy of the median extent observed over the past quarter century, as the image from Nov. 14 (above, right) shows.
To be sure, it is hard to know exactly what proportion of incompetence and dishonesty one should ascribe to Lawrence Solomon in his discussion
of the sea ice record.
Not exact matches
In March 2017,
sea ice around the North and South Poles reached
record lows for that time
of year.
«If you're trying to detect change in something, you need long and continuous uninterrupted
records of things like the
sea ice or
sea level rise or Greenland's
ice sheet,» Shepherd said.
But Arctic
sea ice has been consistently below the long - term average since 2003 and the summer melts
of 2007, 2008 and 2009 were the three largest melts
recorded.
The
record - setting melt
of Arctic
sea ice helped set the stage for Hurricane Sandy according to scientists
From disease to weather patterns, the meltdown
of Arctic
sea ice — close to
record levels again this year — is changing the globe
The research team — which utilized 34,000 data
records from 2010 and 2011 — concluded that melting
sea ice is diluting seawater and reducing the concentrations
of the carbonate minerals critical as building blocks for the shells
of marine life.
That means the most complete and most scientifically significant
sea -
ice record is at risk
of breaking.
«The autumn volume
of the
sea ice (as opposed to the extent) is still close to its minimum
record,» Robert Meisner, spokesman for European Space Agency, said yesterday.
«Although a direct causal link has not been established between the atmospheric phenomena observed in late October 2012 and the
record - breaking
sea -
ice loss observed during the preceding summer months, all
of the observations are consistent with such an interpretation,» states the Oceanography article.
Never mind that this summer saw a
record - breaking meltdown
of Arctic
sea ice, presaging rising
sea levels and more extremely weird weather.
One
of the most important continuous
records of climate change — nearly four decades
of satellite measurements
of Arctic and Antarctic
sea ice — might soon be interrupted.
This year's Arctic
sea ice cover currently is the sixth - lowest on modern
record, a ranking that raises ongoing concerns about the speed
of ice melt and the effects
of ice loss on global weather patterns, geopolitical fights, indigenous peoples and wildlife, scientists said yesterday.
The
Sea Ice Knowledge and Use (SIKU) project aims to record some of this information as the sea ice the hunters have known changes before their ey
Sea Ice Knowledge and Use (SIKU) project aims to record some of this information as the sea ice the hunters have known changes before their ey
Ice Knowledge and Use (SIKU) project aims to
record some
of this information as the
sea ice the hunters have known changes before their ey
sea ice the hunters have known changes before their ey
ice the hunters have known changes before their eyes.
The case
of this one polar bear and the failure
of her offspring to survive in the new environmental conditions
of the Arctic doesn't bode well for the future
of the species, especially as Arctic
sea ice continues to retreat at a
record pace.
This type
of analysis may be useful for future applications
of using seismic
records to track the strength
of sea ice over large regions, which has been difficult to determine from satellite observations.»
«This highly unusual state
of the atmosphere has been linked to
record low
sea ice cover during summer over the Arctic Ocean.
After a decade with nine
of the lowest arctic
sea -
ice minima on
record, including the historically low minimum in 2012, we synthesize recent developments in the study
of ecological responses to
sea -
ice decline.
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
record follows a trend over the past three years
of anomalously high winter
ice extents, providing a stark contrast to the inexorable decline
of Arctic
sea ice
Still,
sea ice is far below the long - term average and stands to rank among the lowest years on
record at its end -
of - summer nadir.
Arctic
sea ice reaches its peak at the end
of the winter; last year that winter peak set a
record low.
AWI researchers observed a considerable decrease in the thickness
of the
sea ice as early as the late summer
of 2015, even though the overall
ice covered area
of the September minimum ultimately exceeded the
record low
of 2012 by approximately one million square kilometres.
His 2011 data show the lowest coverage
of sea ice since
records began.
They then used the satellite
record of Arctic
sea ice extent to calculate the rates
of sea ice loss and then projected those rates into the future, to estimate how much more the
sea ice cover may shrink in approximately three polar bear generations, or 35 years.
But, as scientists including National Oceanic and Atmospheric Administration (NOAA) Administrator Jane Lubchenco said today at a press conference at the American Geophysical Union's fall meeting,
record - setting melting happened anyway:
record snow melt,
record sea ice minimum, melting even at the top
of the Greenland
ice sheet (in what was once called the «dry snow zone»), and widespread warming
of permafrost.
«The Arctic is facing a decline in
sea ice that might equal the negative
record of 2012: Data collected by the CryoSat - 2 satellite reveal large amounts
of thin
ice that are unlikely to survive the summer.»
Sea ice physicists from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI), are anticipating that the sea ice cover in the Arctic Ocean this summer may shrink to the record low of 20
Sea ice physicists from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI), are anticipating that the
sea ice cover in the Arctic Ocean this summer may shrink to the record low of 20
sea ice cover in the Arctic Ocean this summer may shrink to the
record low
of 2012.
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.
As the Arctic
sea -
ice reaches its summer minimum extent, it is clear that it has yet again shrunk to one
of the smallest areas in recent decades, 10 % above the
record minimum set last year.
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of 2013's Most Extreme Events Arctic
Sea Ice to Reach Sixth 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.
The research is timely given the extreme winter
of 2017 - 2018, including
record warm Arctic and low
sea ice,
record - breaking polar vortex disruption,
record - breaking cold and disruptive snowfalls in the United States and Europe, severe «bomb cyclones» and costly nor'easter s, said Judah Cohen, director
of seasonal forecasting at AER and lead author
of the study.
During a
record melting jag this past summer, the Greenland
ice sheet lost 552 billion tons (19 billion tons lower than the previous low), and the volume
of sea ice fell to half the volume it had four years ago.
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.
To think that now the Antarctic
sea ice extent is actually reaching a
record minimum, that's definitely
of interest.»
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 happened just two years after several monthly
record high
sea ice extents in Antarctica and decades
of moderate
sea ice growth.
Some say the
record loss
of sea ice in summer 2012 was a one - off, others that it was the start
of a runaway collapse.
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).
The
record - low winter maximum doesn't necessarily herald a
record low end -
of - summer minimum come September, as summer weather patterns have a large effect on
sea ice area.
The Arctic has been one
of the areas
of the world that has seen sky - high temperatures this year, which have led to
record - low
sea ice levels.
As it stands, 2017 had the lowest amount
of Arctic
sea ice on
record, followed by 2018, 2016, and 2015.
This year's maximum was likely reached on March 7, the NSIDC said Wednesday, when
sea ice covered 5.57 million square miles, the lowest in 38 years
of satellite
records.
The recent string
of record - low winter maximums could be a sign that the large summer losses are starting to show up more in other seasons, with an increasingly delayed fall freeze - up that leaves less time for
sea ice to accumulate in winter, Julienne Stroeve, an NSIDC scientist and University College London professor, previously said.
In September 2007 less
sea ice covered the Arctic than at any point since the U.S. government began keeping
records of its decline.
That helped drive last summer's near -
record thaw
of Arctic
sea ice, second only to the dramatic melt observed in 2007.
First
of all, less
sea ice is forming in the region, and secondly, oceanographic
recordings from the continental shelf break confirm that the warm water masses are already moving closer and closer to the
ice shelf in pulses,» says Dr Hartmut Hellmer, an oceanographer at the AWI and first author
of the study.