Global Heating and Precipitation Report

Global Heating and Precipitation Report

Recently, scientists found that the loss of Arctic snow from global warming leads to excessive rainfall at the end of the monsoon.

The research, led by the National Centre for Polar and Ocean Research under the ministry of earth sciences, has found that the frequency of extreme rainfall events (daily rainfall >150 mm) in central India in September displayed a consistently increasing trend with declining summer sea ice extent during the Early Twentieth Century Warming (ETCW, 1920–1940) period and recent warming since the 1980s.

Key Points

  • The research is led by the National Center for Polar and Oceanic Research (under the Ministry of Earth Sciences).
  • Over the past 30 years, the Arctic has warmed at twice the rate of the entire world. This phenomenon is known as Arctic Amplification.
  • It has been found that changes in upper level atmospheric circulation due to loss of Arctic sea ice and extremely warm sea surface temperatures over the Arabian Sea contribute to a significant increase in monsoon rainfall.
  • In another related headlines, in just three days in 2019, after an iceberg collapsed under a giant lake in Antarctica, that lake became extinct.
  • The weight of the water stored in this deep lake caused a crack in the Amery ice rock, a process known as hydro-fracture, which caused the water stored in the lake to flow into the ocean.

Source – The Hindu

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