MOSCOW (Sputnik)-- The Antarctic sea ice cover has shrunk by almost a quarter, as as the Arctic
sea ice cap decreased by almost 8 percent.
The sea ice cap grows and shrinks cyclically with the seasons.
NASA's long - running Operation IceBridge campaign last week began a series of airborne measurements of melt ponds on the surface of the Arctic
sea ice cap.
The sea ice cap, which used to be a solid sheet of ice, is now fragmented into smaller floes that are exposed to warm water on more sides.
You refer to the ongoing loss of the Arctic
Sea Ice cap, which is indeed ongoing, but floating (and thus adds nothing to the sea level budget).
Overall, the Arctic's
sea ice cap has shrunk by nearly a third since 1979, according to the US National Snow and Ice Data Centre.
The importance of ice volume is that it reflects the ability of the Arctic
sea ice cap to absorb heat without melting away entirely.
Dr. Will Chapman's Cryosphere Today web page offers an archive of daily polar
sea ice cap concentrations (1979 — present) at:
«
The sea ice cap, which used to be a solid sheet of ice, now is fragmented into smaller floes that are more exposed to warm ocean waters.
Besides shrinking in extent,
the sea ice cap is also thinning and becoming more vulnerable to the action of ocean waters, winds and warmer temperatures.
Not exact matches
The team found that, for the last 20 years, the glacier and
ice cap mass loss has been exactly equal to the amount of meltwater runoff lost to the
sea.
The warming temperatures have caused
ice caps to melt, and
sea levels to rise, scientific agencies such as the National Oceanic and Atmospheric Administration say.
The
sea is just 5 ° north of the Martian equator and would be the first discovery of a large body of water beyond the planet's polar
ice caps.
The
sea level around a melting
ice cap will fall even as distant shores are inundated
Such erosion can result from any number of factors, including the simple inundation of the land by rising
sea levels resulting from the melting of the polar
ice caps.
Also, because of Quelccaya's high elevation (about 3.5 miles above
sea level), only significant air pollution can reach the
ice cap.
During
ice ages, which are mainly driven by rhythmic variations in Earth's orbit and spin that alter sunlight in the Northern Hemisphere, growing
ice caps and glaciers trap so much frozen water on land that
sea levels can drop a hundred meters or more.
This is reassuring, because if the
ice cap did melt completely in the near future, it would raise global
sea levels by 60 metres.
El Niño thus leaves its mark on the Quelccaya
ice cap as a chemical signature (especially in oxygen isotopes) indicating
sea surface temperatures in the equatorial Pacific Ocean over much of the past 1,800 years.
The melting of the polar
ice cap would have a drastic effect:
Sea level would rise by several meters around the world, impacting hundreds of millions of people who live close to coasts.
Many of the projected effects of climate change on the world's oceans are already visible, such as melting polar
ice caps and rising
sea levels.
Reviews range from simple comments such as «this is a good piece of science journalism» to detailed scientific explanations such as how «polar
ice cap» fails to distinguish between land
ice and
sea ice.
Our study suggests that at medium
sea levels, powerful forces, such as the dramatic acceleration of polar
ice cap melting, are not necessary to create abrupt climate shifts and temperature changes.»
The hunt for extreme oil proceeds apace in the ultradeep waters off the coasts of Ghana and Nigeria, in the sulfur - laden depths of the Black
Sea, under the polar
ice caps, and in the gummy tar sands of Venezuela's Orinoco Basin and Canada's McMurray Formation.
Covering 1.59 million square miles (4.12 million square kilometers), this summer's
sea ice shattered the previous record for the smallest
ice cap of 2.05 million square miles (5.31 million square kilometers) in 2005 — a further loss of
sea ice area equivalent to the states of California and Texas combined.
In fact, a third type of ecosystem exists along the edge of the
ice cap in the northern Barents
Sea, where Atlantic and Arctic ocean currents meet and mix.
Complementary analyses of the surface mass balance of Greenland (Tedesco et al, 2011) also show that 2010 was a record year for melt area extent... Extrapolating these melt rates forward to 2050, «the cumulative loss could raise
sea level by 15 cm by 2050 ″ for a total of 32 cm (adding in 8 cm from glacial
ice caps and 9 cm from thermal expansion)- a number very close to the best estimate of Vermeer & Rahmstorf (2009), derived by linking the observed rate of
sea level rise to the observed warming.
When you're talking about global warming and melting
ice caps, as everyone seems to be, a five - millimeter adjustment in the modeled diameter of the Earth could be the difference between
sea levels appearing to rise from any given year to the next and then appearing to drop.
Destroy the floating
ice and the
ice cap (which holds enough water to raise
sea levels by 200 feet) would collapse unimpeded into the
sea.
Consistent with observed changes in surface temperature, there has been an almost worldwide reduction in glacier and small
ice cap (not including Antarctica and Greenland) mass and extent in the 20th century; snow cover has decreased in many regions of the Northern Hemisphere;
sea ice extents have decreased in the Arctic, particularly in spring and summer (Chapter 4); the oceans are warming; and
sea level is rising (Chapter 5).
Dogmatism, toxicology, linear no - dose threshold, LNT, Calabrese, EPA, Watergate II,
sea level rise, IPCC, datasets calibrated, Mann, NCEI, GISS, cryosphere, GRACE, mountain glaciers, ocean expansion, polar
ice caps, DMI, sun, bias, 2 billion, gamble
The
sea ice that
caps the Arctic Ocean naturally waxes and wanes with the seasons, reaching its maximum area at the end of winter, before the reemergence of the sun in spring starts off the melt season.
It is noteworthy that whereas
ice melt from glaciers,
ice caps and
ice sheets is very important in the
sea level budget (contributing about 40 %), the energy associated with
ice melt contributes only about 1 % to the Earth's energy budget.
The ocean heat content change is from this section and Levitus et al. (2005c); glaciers,
ice caps and Greenland and Antarctic Ice Sheets from Chapter 4; continental heat content from Beltrami et al. (2002); atmospheric energy content based on Trenberth et al. (2001); and arctic sea ice release from Hilmer and Lemke (200
ice caps and Greenland and Antarctic
Ice Sheets from Chapter 4; continental heat content from Beltrami et al. (2002); atmospheric energy content based on Trenberth et al. (2001); and arctic sea ice release from Hilmer and Lemke (200
Ice Sheets from Chapter 4; continental heat content from Beltrami et al. (2002); atmospheric energy content based on Trenberth et al. (2001); and arctic
sea ice release from Hilmer and Lemke (200
ice release from Hilmer and Lemke (2000).
This includes changes in heat content of the lithosphere (Beltrami et al., 2002), the atmosphere (e.g., Trenberth et al., 2001) and the total heat of fusion due to melting of i) glaciers,
ice caps and the Antarctic and Greenland Ice Sheets (see Chapter 4) and ii) arctic sea ice (Hilmer and Lemke, 200
ice caps and the Antarctic and Greenland
Ice Sheets (see Chapter 4) and ii) arctic sea ice (Hilmer and Lemke, 200
Ice Sheets (see Chapter 4) and ii) arctic
sea ice (Hilmer and Lemke, 200
ice (Hilmer and Lemke, 2000).
Worldwide, small
ice caps and glaciers have reacted particularly dynamically to worldwide increases in temperatures9 - 11, and it has been proposed that the volume loss from mountain glaciers and
ice caps like these is the main contributor to recent global
sea - level rise12.
Capping off a season of sustained, mind - boggling warm weather and stunted
sea ice growth, the annual Arctic
sea ice maximum hit its lowest level ever recorded.
The latter events left behind distinctive rock - sequences typically consisting of tillites (ancient boulder - clay, now solid rock) representing
ice - deposited debris, overlain with a depositional break by
cap - carbonates (chemical sediments of marine origin deposited during interglacials following global
sea - level rises).
This acceleration in
sea - level rise is consistent with a doubling in contribution from melting of glaciers,
ice caps and the Greenland and West - Antarctic
ice - sheets.
Also with significant
sea level rise — say 2 or 3 feet, Antarctic ocean rise will lift up the
ice sheet boundary where it meets the
ice caps.
Main results show that
ice cap melt on Greenland and / or Antarctica injects fresh water into oceans near respective continents causing rapid
sea level rise and shuts down AMOC and / or SMOC leading to enormous global climate disruption, including massive storms.»
The way humans mistreat water has dominated headlines and become mission critical to address: the melting polar
ice caps and rising
sea levels, the poisoned tap water in Flint, Michigan — and the threat the Dakota Access Pipeline poses to the Standing Rock Sioux tribe.
As glaciers and
ice caps melt, Louisiana is losing land to the
sea and barrier islands are gradually slipping beneath the watery surface, drowned by a slowly rising tide, a process suggested by the cover photo.
The
seas were choked with
ice even in midsummer, for tremendous storms would crack the polar
ice cap and fling mountainous cliffs into the paths of their wooden vessels.
As the last
ice age ended, about 18,000 years ago, the
ice caps began to melt and return their water to the oceans and
sea level rose.
It is difficult for many people (including some geologists) to visualize how
sea level could drop that much just by expanding the
ice caps.
And instead of deploying apocalyptic images of landfills overwhelmed by waste or melting
ice caps swallowed by the
sea, artists are finding new, conceptual ways to depict landscape.
During the expedition, he was at
sea, on an
ice cap or in some remote location for weeks or months on end.
And this is just one element in the
sea level rise — small
ice caps are melting faster, thermal expansion will increase in line with ocean heat content changes and Antarctic
ice sheets are also losing mass.
There are fast feedback changes in some things (e.g.
sea ice), and longer - continuing changes in other things (e.g. the Antarctic
cap ice; ocean circulation; plankton species frequency and distribution; ocean pH; terrestrial rainfall and erosion).