He said that high resolution climate models used at Oak Ridge National Laboratory, USA have predicted weakening of summer monsoon precipitation over South Asia towards the end of 21st century. Dr Qamar uz Zaman Chaudhry, Advisor Climate Affairs, was also present on the occasion.
Monsoon is traditionally defined as a seasonal reversing of the wind accompanied by corresponding changes in precipitation, but is now used to describe seasonal changes in atmospheric circulation and precipitation associated with the asymmetric heating of land and sea. The vagaries of South Asian summer monsoon rainfall on short and long time scales impact the lives of more than one billion people while due to the rapid climate change, the glaciers in Pakistan are receding at a rate of almost 40-60 meters per decade posing threat to the region.
In his lecture, Dr Moetasim, discussed simulation and projection of South Asian summer monsoon. He also showed reservations on projections of Intergovernmental Panel on Climate Change (IPCC) and said, there is a large uncertainty in projections of IPCC report based on multi Global Climate Models (GCM). Global models featured in IPCC report can resolve large-scale interactions, but have limitations while capturing atmospheric processes at regional level, he added. He also informed that simulations run in their model show an eastward shift in monsoon circulation, which would mean more rainfall over the eastern parts of South Asia....
Monsoon lightning in Cherukunna, shot by Prakashkpc, Wikimedia Commons, under the Creative Commons Attribution-Share Alike 3.0 Unported license
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