The 40 % concentration
ice edge shown in Figure 1 has retreated to the edge of the band of the multi-year ice in the Beaufort and Chukchi Seas.
Data from buoys installed by the Cold Regions Research and Engineering Laboratory (CRREL) show that surface melt at buoys located in the vicinity of
the ice edge show melt consistent with previous years (Figure 7).
Not exact matches
RETREATING
ICE Jakobshavn Glacier in western Greenland (its front
edge, where
ice is calving into the ocean,
shown here in 2012) is one of the world's fastest - shrinking glaciers.
Data reported by NASA's New Horizons New Horizons mission to the Pluto system
shows unusual terrain in this region, which features a large deposit of nitrogen
ice with a pattern of polygons that are thickest at their centers and dip at their
edges.
This photo has a resolution of about 80 meters per pixel, crisp enough to
show the jagged
edges of
ice mountains that rise above a plain of frozen nitrogen.
Schematic cartoon of a glacier flowing into an
ice shelf,
showing the grounding line and calving at the
ice cliff at the
edge of the
ice shelf.
The average
ice edge is
shown in black.
But while some exercisers swear by
ice baths, claiming it keeps them from being overly sore and gives them a competitive
edge over other athletes, some recent studies on cold exposure after a workout
show that
ice baths might not actually do much to aid in recovery.
From lingerie made of sealskin to temporary
ice paintings captured on film, the
show provides a glimpse at the teeming natural and cultural ecosystem found at Floe
Edge, where human, ocean, animal and art all support and challenge each other.
UPDATE 10:15 p.m.: Other measurements
show that Greenland is still clearly losing more
ice through melting around the
edges than it is gaining through the accumulation of snow in the interior.
In a cutting -
edge survey of satellite data published Feb. 13 in the journal Cryosphere, researchers from NASA and other institutions
shows that
ice loss from the critical region of Antarctica is happening at an increasingly fast pace.
showing the
ice edge much closer to the northern end of Novaya Zemlya and
ice completely surrounding Severnaya Zemlya.
Interestingly, the chart for Aug 1922
shows a summer
ice edge that is slightly farther north than in years previous, but again, nothing like what we are seeing today.
Many of them
show obvious problems in the retrieval (i.e. huge jumps at the land / ocean or ocean /
ice edge) and I have yet to see what the weighting kernel is or any ground truthing.
Years ago, I pushed the idea of developing a reality - TV
show, «Extremities,» on science at the
edge of what's possible, sort of Mythbusters with a rotating cast that'd include biologists climbing cliffs in Greenland to study nesting falcons, the team I joined on the sea
ice near the North Pole and — certainly — scientists driving around Oswego, N.Y., with portable Doppler radars to plumb the innards of storms that produce that region's astounding lake - effect snow, one result of which is depicted in this photo (NOAA):
I haven't read the papers and don't know what is happening with salinity in the rest of the Atlantic, but looking at your map it occurred to me that if there was increased freshwater in the Northern Ocean due to
ice melting and increase salinity in the tropical Atlantic due to increased evaporation, couldn't a mixing effect at the southern
edge of the Northern ocean as tropical water is circulated north
show similar results?
One reason, as other Antarctic research has
shown, is that the speed of loss of Antarctic
ice is to a large extent not a function of air temperature in any case, but of ocean heat intruding beneath the vast shelves of floating
ice around the
edges.
From your link: «In some instances, bright red spots or streaks along the
edge of the continent
show where icebergs calved or
ice shelves disintegrated, meaning the satellite began seeing warmer ocean water where there had previously been
ice.»
The Greenland
Ice Sheet is very similar to the South Pole and the research
shows that it too is melting at an accelerated pace around the
edges.
(Image Caption: This view of the seaward
edge of Antarctica's floating Ross
Ice Shelf shows a region where the ice is cracking and may produce an icebe
Ice Shelf
shows a region where the
ice is cracking and may produce an icebe
ice is cracking and may produce an iceberg.
Collecting data from NASA's satellite Gravity and Recovery Climate Experiment, known as GRACE, and GPS measurements of the bedrock on the
edges of the
ice sheet, the Denmark Technical Institute's National Space Institute in Copenhagen was able to
show that crustal uplift due to
ice loss has gone up by 1.5 inches between October 2005 and August 2009 along the northwest coast, a change that study co-author John Wahr calls «very dramatic».
Prediction is based on evaluation of
ice age that
shows current
ice extent has retreated back to the multiyear
ice edge in the eastern Arctic and in the Beaufort and Chukchi seas.
In contrast, the updated ensemble forecast from a coupled
ice - ocean model submitted by Zhang (Figure 3) still
shows the September
ice edge further north than in 2009.
The current sea
ice extent in the Greenland Sea (Figure 4) differs only a little from the previous years and as Gerland et al. point out, different mean positions of the
ice edge over one to three decades do not
show substantial differences.
Comparing the latest
ice age data from Maslanik and Fowler (see Maslanik contribution) for 21 June 2010 (Figure 6) to current (20 July)
ice extent data
shows that the
ice edge has retreated back to the boundary between first - year and multi-year
ice pack in the eastern Arctic and in the Beaufort and Chukchi seas.
Note that the datasets
show different quantities; in the sea
ice zone the GISTEMP, M10 and CHAPMAN data represent air temperature (though CHAPMAN air temperatures are inferred from SST input data); north of the sea
ice edge the M10 and CHAPMAN data represent air temperature while GISTEMP represents SST; MSU represents tropospheric - average temperatures everywhere.
it
shows current
ice growing at the
edge of the
ice pack with surface temperatures between -10 to -15 C. -11 C looks not so bad.
2012 Sea
ice minimum; purple lines
show normal (median)
ice edge position.
Updated information about
ice extent in this region indicates substantial
ice retreat in the eastern Barents and the Kara Seas, where
ice is now well below climatological extent (Figure 5), with little change in the Greenland Sea and Fram Strait region, where the
ice edge is within the decadal mean range except for the southernmost stretches
shown in Figure 5.
The maps above
show a spatial view of the sea
ice concentrations for the whole of the Arctic, with the average
ice edge for the particular month indicated by a pink line.
However, the the study also found that measurements at the
ice's
edge show that climate models alone can overestimate the volume of meltwater flowing to the ocean because they fail to account for water storage beneath the
ice.
First up is a group of photos from Twitter user
Ice Universe, which
show what looks like the Galaxy S8 with an
edge - to -
edge display.