Antarctic Ice Sheet . Is Global Warming Over ?

For Decades scientist have been telling the world about the Melting Antarctic Ice Sheet .But in recent studies NASA found that the density of the ice sheet is actually increasing .

A new NASA study found that Antarctica has been adding more ice than it’s been losing, challenging other research, including that of the UN’s  very own Intergovernmental Panel on Climate Change, that concludes that Earth’s southern continent is losing land ice overall.

ANTARCTIC ICE SHEET AND RISING SEA LEVEL :

“The good news is that Antarctica is not currently contributing to sea level rise, but is taking 0.23 millimeters per year away,” said Dr. Zwally.

“But this is also bad news,” he added. “If the 0.27 millimeters per year of sea level rise attributed to Antarctica in the IPCC report is not really coming from Antarctica, there must be some other contribution to sea level rise that is not accounted for.”

The paper calls attention to how difficult it is for scientists to measure small changes in ice height, particularly in East Antarctica, the largest part of the polar continent and the one that showed discrepancies with previous measurements.

“We’re essentially in agreement with other studies that show an increase in ice discharge,” in other parts of the continent, Zwally said.

“Our main disagreement is for East Antarctica and the interior of West Antarctica; there, we see an ice gain that exceeds the losses in the other areas,” he explained in a NASA announcement.

The scientists calculated this gain by looking at the height of the Antarctic ice sheet as measured by radar instruments on two European Space Agency satellites from 1992 to 2001, and by laser sensors on a NASA satellite from 2003 to 2008.

Other scientists have observed gains in land elevation in East Antarctica, explains NASA, but they’ve attributed this to snowfall in the region. But Zwally’s team used meteorological data dating back to 1979 to show that the snow accumulation in East Antarctica has actually been declining, showing that the increase in elevation must be the result of thicker ice.

NASA explains that this has been possible because at the end of the last Ice Age about 10,000 years ago, warming air carried more moisture across the continent, doubling the amount of snowfall that has been accumulating and compacting it into solid ice.

The agency is developing new tools – due to launch in 2018 – that will help more accurately measure long-term ice changes in Antarctica.

“ICESat-2 will measure changes in the ice sheet within the thickness of a No. 2 pencil,” said Tom Neumann, a glaciologist at NASA.

More You Should Know About Antarctica and why ice sheet of Antarctica is important ?

Geography of Antarctic :

The sea piece of the locale constitutes the zone of utilization of the universal Convention for the Conservation of Antarctic Marine Living Resources (CCAMLR), where for specialized reasons the Convention utilizes an estimation of the Convergence line by method for a line joining indicated focuses along parallels of scope and meridians of longitude. The execution of the Convention is overseen through a worldwide Commission headquartered in Hobart, Australia, by a proficient arrangement of yearly angling amounts, licenses and global controllers on the angling vessels, and in addition satellite observation.

A large portion of the Antarctic district is arranged south of 60°S scope parallel, and is represented as per the worldwide legitimate administration of the Antarctic Treaty System. The Treaty territory covers the landmass itself and its promptly adjoining islands, and also the archipelagosof the South Orkney Islands, South Shetland Islands, Peter I Island, Scott Island and Balleny Islands.

The islands arranged between 60°S scope parallel toward the south and the Antarctic Convergence toward the north, and their separate 200-nautical-mile (370 km) Exclusive Economic Zones fall under the national locale of the nations that have them: South Georgia and the South Sandwich Islands (United Kingdom; likewise an EU Overseas region), Bouvet Island (Norway), and Heard and McDonald Islands (Australia).

Kerguelen Islands (France; additionally an EU Overseas domain) are arranged in the Antarctic Convergence range, while the Falkland Islands, Isla de los Estados, Hornos Island with Cape Horn, Diego Ramírez Islands, Campbell Island, Macquarie Island, Amsterdam and Saint PaulIslands, Crozet Islands, Prince Edward Islands, and Gough Island and Tristan da Cunha gathering stay north of the Convergence and hence outside the Antarctic area .


 

Know about People of Antarctic :

The primary Antarctic area found was the island of South Georgia, went by the English shipper Anthony de la Roché in 1675.

In spite of the fact that myths and hypothesis around a Terra Australis (“Southern Land”) go back to relic, the initially affirmed locating of the landmass of Antarctica is ordinarily acknowledged to have happened in 1820 by the Russian campaign of Fabian Gottlieb von Bellingshausen and Mikhail Lazarev on Vostok and Mirny.

The primary human conceived in the Antarctic was Solveig Gunbjørg Jacobsen conceived on 8 October 1913 in Grytviken, South Georgia.

The Antarctic district had no indigenous populace when initially found, and its present tenants include a couple of thousand transient experimental and other faculty chipping away at voyages through obligation at the few dozen exploration stations kept up by different nations.

In any case, the district is gone to by more than 40,000 sightseers yearly, the most famous destinations being the Antarctic Peninsula territory (particularly the South Shetland Islands) and South Georgia Island.

In December 2009, the development of tourism, with results for both the biology and the wellbeing of the voyagers in its awesome and remote wild, was noted at a meeting in New Zealand by specialists from signatories to the Antarctic Treaty. The authoritative consequences of the gathering would be displayed at the Antarctic Treaty states’ meeting in Uruguay in May 201


 

Sources:  

  1. http://www.nasa.gov/feature/goddard/nasa-study-mass-gains-of-antarctic-ice-sheet-greater-than-losses

2. https://en.wikipedia.org/wiki/Antarctic

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