Sunday 26 January 2020

Antarctica melting or ice loss

Antarctica Ice loss :
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Cryosphere of the Earth is mainly found on the Polar regions of Arctic , Greenland and Antarctica along with mountainous glaciers  Antarctica is the largest reservoirs of ice , constitutes world 61% of freshwater, Antarctica consist of  14 million sqkm of area cover by 98% by ice.  It contains 26.5million cubic km of ice. Majority of ice cover in Antarctica is found on it's Eastern part. If all ice of Antarctica is melted then sea level will rise by 63 m.



Geographically Antarctica is divided into 3 parts : 1) East Antarctica 2) West Antarctica and 3) Peninsular Antarctica.

 Antarctica ice sheet is the largest ice cover on the earth due to global warming and climate change rate of melting is speeded up nearly 250 billion tonnes of ice melted every year .

The continent’s annual ice loss has sextupled since 1979, jumping from 40 billion tons to 250 billion tons in 2017

Global sea levels have risen by seven to eight inches since 1990, but again, researchers say this number will only increase in the coming decades. In fact, a 2013 report predicted a jump of nearly three feet by 2100 if no action is taken to significantly curb carbon output. In total, Antarctica’s ice holds a potential 187.66 feet of sea-level rise. It is contribute to 0.6mm increase in the sea level and other associated hazards such as coastal flooding, submergence of low lying island countries like Solomon and Maldives, sea surge affecting the coastal settlement ,agriculture, etc.
But the rate of melting in the anatarica varies between it's east and west. In its east ice cover area has increased due to higher precipitation and oceanic currents and eastward wind blows from land to sea. But the thickness even decreases in the east. While western part of anatartica ice sheet cover has decreased slot in last 25 years.
Solution lies is implementing the coordinated steps of Paris agreement to limit the global temperature within 2degree Celsius rise from the pre-industrial phase. To curb the carbon emissions, mitigation and adaptive steps in the vulnerable coastal areas, shifting to renewable sources of energy, green economy , protect the islands and coastal areas which are verge of lost, sustaining the livelihood of coastal communities. Climate fund collected and disbursed as soon as possible, geoengineering steps, carbon sink and sequestration build up, national action plan for climate change.etc

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