| Session Details | |
| Section | AS - Atmospheric Sciences |
| Session Title | Observational Studies and Numerical Simulation of Intense Convection Activity Trends in the Tropics |
| Main Convener | Dr. Hsin-I Chang (University of Arizona, United States) |
| Co-convener(s) | Dr. Dev Niyogi (Purdue University, United States) Prof. U. C. Mohanty (Indian Institute of Technology, Delhi, India) Prof. U. C. Mohanty (Indian Institute of Technology, Delhi, India) Prof. U. C. Mohanty (Indian Institute of Technology, Delhi, India) Dr. Raju Pemmani (Regional Integrated Multi hazard Early Warning System (RIMES), Thailand) Dr. Raju Pemmani (Regional Integrated Multi hazard Early Warning System (RIMES), Thailand) Dr. Yung-Ming Chen (National Science and Technology Center for Disaster Reduction (NCDR), Taiwan) Dr. Yung-Ming Chen (National Science and Technology Center for Disaster Reduction (NCDR), Taiwan) Prof. U. C. Mohanty (Indian Institute of Technology, Delhi, India) Prof. U. C. Mohanty (Indian Institute of Technology, Delhi, India) Prof. U. C. Mohanty (Indian Institute of Technology, Delhi, India) |
| Session Description | Monsoon-related precipitation is a major source of water supply in most of the Asian monsoon regions. And changes in the mesoscale precipitation over these regions remain an important weather and climate simulation problem. Observations indicate monsoon rainfall is becoming more extreme, and mesoscale convection and heavy rain activities are showing an increasing trend. The heavy rainfall events can be characterized by deep convection, intense thunderstorms and tropical cyclones over different Asian monsoon regions. These intense rain events have caused severe damages in public infrastructure, private properties, and lost of human lives. To date, general circulation models still fail to accurately simulate the summer moisture/precipitation hotspot over the Asian monsoon regions. Similarly, the numerical weather prediction models both in the operational or research mode have significant errors in their ability to simulate heavy rain events (both in forecast as well reanalysis/hindcast experiments). These heavy rain events are predominantly associated with mesoscale convective systems and therefore improving the ability of current NWP models to simulate the mesoscale convection events becomes an important task to enhance current weather forecast. International efforts are underway to improve the convection prediction with dedicated field campaign experiments, model intercomparison studies for high impact weather events, and assimilation approaches involving satellite and conventional datasets. This section will provide excellent opportunity for exchanging results in both observational analysis and numerical simulations in understanding the mechanisms/trends of intense convection activities in the Asian monsoon regions. |