POLAR AMPLIFICATION
Due to the global warming, any change in the surface air temperature and the net radiation balance tends to produce larger change at the Polar areas.
These changes are more pronounced at the northern latitudes and are known as the Arctic amplification.
WHAT ARE EFFECT OF ARCTIC AMPLIFICATION
according to report published by FINNISH METEOROLOGICAL INSTITUTE RESEARCHERS on August 11 2022 ,
The Arctic is heating 4 times faster than the rest of planet.
Barents sea north of Russia and Norway is warming at alarming rate -7 times faster than the globle average.
Studies in 2022(geophysical research letters) indicate that the Arctic amplification is 4 times the globle rate.
IPCC release a special report on the ocean and cryosphere in changing climate in 2019 which said that the Arctic surface air temperature has likely increase by more than double the globe average over the last two decades.
In 2021 ARCTIC MONITORING AND ASSESSMENT PROGRAMME (AMAP) warned that the Arctic has warmed 3 times quicker than planet and the average annual temperature in the region increase by 3.1C.
CAUSES
Anthropogenic forces
Ice-albedo feedback
Lapse rate feedback
Water vapour feedback
Ocean heat transport
Sea ice have high albedo, implying that they are capable of reflecting most of solar radiation but in Arctic, due to sea ice melts,ocean is more capable of absorbing solar radiation. Study shows that ice albedo feedback and lapse rate feedback are responsible for 40% &15% of polar amplification respectively.
CONSEQUENCES
the cause and consequences of Arctic amplification are cyclic.
The Greenland ice is melting at alarming rate.
young and thinner ice replacing old and thicker ice sheets.
The unusual summer temperature resulted in melt of 6 billion tonnes of sheets ice per day.
Greenland ice hold 2nd largest amount of ice after Antarctica.
And this is 2nd biggest cause of raising sea level about 1.5 meters.
The acidification of water.
Change in salinity level.
Impact on marine biodiversity
Increasing in extreme weather and rainfall
Widespread starvation and death among the Arctic fauna.
IMPACT ON INDIA
raise in extremeweather event,
a study titled ' A possible relation between arctic sea ice and the late season indian summer monsoon rainfall extremes' published in 2021 by a group of indian and nowegian scientists found that the reduce sea ice in the barent kara sea resion can lead to extreme rainfall event in letter half of the mansoon.
In 2014 India deployed IndARC, india's first moored underwater observatory in the svalbard, to monitor the impact of climate change.
according to world meteorological organization's report, 'state of global climate in 2021', sea level along the vindian cost is raising fasterthan the global average rate.
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