What is the difference
between sea ice area and extent?
For more on sea ice extent, see Frequently Asked Questions About Arctic Sea Ice: «What is the difference
between sea ice area and extent?»
While climate models also simulate the observed linear relationship
between sea ice area and CO2 emissions, they usually have a much lower sensitivity of the ice cover than has been observed.
Not exact matches
To do so, the authors examine the link
between carbon - dioxide emissions and the
area of Arctic summer
sea ice, and find that both are linearly related.
A cloud front can be seen in the lower left, and dark
areas indicate regions of open water
between sea ice formations.
In the San Francisco Bay
area,
sea level rise alone could inundate an
area of
between 50 and 410 square kilometres by 2100, depending both on how much action is taken to limit further global warming and how fast the polar
ice sheets melt.
Satellite data show that the annual minimum for Arctic
sea ice area fell 7 percent per decade
between 1980 and 2000 — but since 2000 it has fallen 14 percent per decade.
In the
area surveyed, which lies to the north of the Fram Strait
between Greenland and Svalbard, the
sea -
ice thickness was ca. 1.7 metres, roughly 50 centimetres more than was recorded in 2016.
On its own,
sea level rise could inundate
between 50 and 410 square kilometres of this
area by 2100, depending on how much is done to limit further global warming and how fast the polar
ice sheets melt.
Judah Cohen, a climate forecaster at Atmospheric and Environmental Research in Massachusetts, who issues seasonal snowfall forecasts several months in advance for his company's clients, said the relationship
between sea ice loss and the Arctic Oscillation is a key
area for future research to focus on.
Historically, a new low
sea ice extent (
area) is set every five years, with small recoveries in -
between.
This means that all the energy going into the melting of
sea ice,
ice sheets and glaciers plus the warming of land and atmosphere is the tiny gap
between the blue
area and the red line.
On the other hand, during those periods
between widespread glaciation, the water had melted from the
ice sheets and polar
areas, flowed, back into the oceans and
sea level was as high or higher than now.
A period for which the SCL index is NOT «well defined», and an
area many times larger than the Greenland
Sea, behaving in a fashion for which we have no recent precedent according to literature — see, for instance the review article from Polyak et al, 2010 — «could» be natural since a possible relationship between sea ice and solar cycle length has been demonstrated, sort
Sea, behaving in a fashion for which we have no recent precedent according to literature — see, for instance the review article from Polyak et al, 2010 — «could» be natural since a possible relationship
between sea ice and solar cycle length has been demonstrated, sort
sea ice and solar cycle length has been demonstrated, sort of.
Historically, a new low
sea ice extent (
area) is set every five years, with small recoveries in -
between.
If all of the currently attainable carbon resources [estimated to be
between 8500 and 13.600 GtC (4)-RSB- were burned, the Antarctic
Ice Sheet would lose most of its mass, raising global sea level by more than 50 m. For the 125 GtC as well as the 500, 800, 2500, and 5000 GtC scenarios, the ice - covered area is depicted in white (ice - free bedrock in brow
Ice Sheet would lose most of its mass, raising global
sea level by more than 50 m. For the 125 GtC as well as the 500, 800, 2500, and 5000 GtC scenarios, the
ice - covered area is depicted in white (ice - free bedrock in brow
ice - covered
area is depicted in white (
ice - free bedrock in brow
ice - free bedrock in brown).
The yellow outline is the median minimum
sea ice extent for 1979 — 2000; that is,
areas that were at least 15 percent
ice - covered in at least half the years
between 1979 and 2000.
Newly grown
sea ice (greyish
areas) forming
between old floes, which survived the previous summer melt.
This means that all the energy going into the melting of
sea ice,
ice sheets and glaciers plus the warming of land and atmosphere is the tiny gap
between the blue
area and the red line.
They found find that the Arctic
sea -
ice minimum can be accurately forecasted from melt - pond
area in spring with a strong correlation
between the spring pond fraction and September
sea -
ice extent.
That is, I expect to go from a
sea ice area of 2 or 3 million km ^ 2 to almost nothing in one melt season as a result of a storm driven by the temperature differential
between the
sea ice and the surrounding environment.
As a layman (which probably 99 % of us are on the topic of
sea ice) and trying to learn something — it appears that people who are posting are sometimes not distinguishing
between (1) surface
area and (2) volume (surface
area plus depth of old
ice).
A large sector of what was remotely sensed to be multi-year
sea ice at 7 to 9 + tenths
ice cover, consisting primarily of multy - year
ice floes, was in fact a surface of heavily decayed
ice composed of some small multi-year floes (1 tenth) interspersed in a cover dominated by heavily decayed first - year floes (1 tenths) and overlain by new
sea ice in
areas of negative freeboard and in open water
between floes.
Science: satellite data showing Arctic
sea ice between 1979 and The white area shows a moving average of Arctic sea ice between 2003 and The darker blue surrounding the white area is the moving average for the sea ice between 1979 and Between 1979 and 2005, average Arctic sea ice dropped 20 % — a loss in area about the size of the U.S. state of
between 1979 and The white
area shows a moving average of Arctic
sea ice between 2003 and The darker blue surrounding the white area is the moving average for the sea ice between 1979 and Between 1979 and 2005, average Arctic sea ice dropped 20 % — a loss in area about the size of the U.S. state of
between 2003 and The darker blue surrounding the white
area is the moving average for the
sea ice between 1979 and Between 1979 and 2005, average Arctic sea ice dropped 20 % — a loss in area about the size of the U.S. state of
between 1979 and
Between 1979 and 2005, average Arctic sea ice dropped 20 % — a loss in area about the size of the U.S. state of
Between 1979 and 2005, average Arctic
sea ice dropped 20 % — a loss in
area about the size of the U.S. state of Texas.
It emphasises that there is a strong internal relationship
between the formation, stability and extent of
sea ‐
ice and the structure of the upper layer of the Arctic ocean: it is the relative
area and depth of low - salinity arctic water above the halocline that are paramount to
ice formation and its summer survival.
Judah Cohen, a climate forecaster at Atmospheric and Environmental Research in Massachusetts, who issues seasonal snowfall forecasts several months in advance for his company's clients, said the relationship
between sea ice loss and the Arctic Oscillation is a key
area for future research to focus on.
In the Arctic, the
sea -
ice area ranges
between 9 and 12 x 106 km2 (as opposed to 4 and 19 x 106 km2 around Antarctica).
Based on the understanding of both the physical processes that control key climate feedbacks (see Section 8.6.3), and also the origin of inter-model differences in the simulation of feedbacks (see Section 8.6.2), the following climate characteristics appear to be particularly important: (i) for the water vapour and lapse rate feedbacks, the response of upper - tropospheric RH and lapse rate to interannual or decadal changes in climate; (ii) for cloud feedbacks, the response of boundary - layer clouds and anvil clouds to a change in surface or atmospheric conditions and the change in cloud radiative properties associated with a change in extratropical synoptic weather systems; (iii) for snow albedo feedbacks, the relationship
between surface air temperature and snow melt over northern land
areas during spring and (iv) for
sea ice feedbacks, the simulation of
sea ice thickness.
This chart, from Gagné et al, shows the
area - averaged annual mean
sea ice concentration anomaly
between 1950 and 2005.
The
area covered by
sea ice in the Arctic has shrunk to its lowest level this week since satellite measurements began nearly 30 years ago, opening up the Northwest Passage — a long - sought short cut
between Europe and Asia that has been historically impassable.
Anderson (Norwegian Space Center); 4.1; Statistical Prediction is based on the relationship
between melting and freezing in the Arctic by comparing winter maximum
sea ice area with the summer minimum
sea ice area.