Summary of Abstract Submission

Abstract Submission No. IO50-10-0026PresentationOral

INFLUENCE OF INDO-PACIFIC SST ON INDO-PAK FLOOD EVENT DURING 2010: A HYDRO-METEOROLOGICAL PERSPECTIVE

Milind Mujumdar*1, Priya P1, Sabin T.P1, Krishnan R. 1

1 Indian Institute of Tropical Meteorology, Pune-411008, INDIA

ABSTRACT :

There have been few studies on evolution of monsoon synoptic systems and mid-latitude atmospheric blocking associated with the heavy precipitation and floods over northwest Pakistan during strong La Niña 2010. However, the role of tropical Indo-Pacific SST anomalies, specifically the ENSO related and ENSO unrelated component, on the evolution of extreme rain events over Indo-Pak region remains unexplored. We therefore carry out a suite of sensitivity experiments with a high resolution (~35 x 35 km) Atmospheric General Circulation Model, developed at the Laboratoire de Météorologie Dynamique (LMDZ4; Z stands for zoom), to investigate the role Indo-Pacific boundary conditions in the evolution of 2010 Indo-Pak flood event. Additionally, the uncertainty in simulation of river discharge at downstream area due to extreme rain event over Indus basin is assessed with ensemble simulation experiment using a high resolution hydrological model. Our results suggest the regional SST forcing over Indian Ocean is crucial as compared to that of Pacific SST forcings for the realistic simulation of the flood event during 2010.