Changes in Asian sea wind and wave climate simulated by time-slice experiments with the boundary condition of 6 different sea surface temperatures

Abstract

We investigated changes in Asian sea wind and wave climate during July-October under global warming conditions. To do this, we used an atmospheric general circulation model (AGCM) configured with the horizontal resolution of T106 to carry out 11-yr time-slice experiments with the boundary condition of 6 different sea surface temperature (SST) fields. It was found that surface wind speeds under present climate simulated by our AGCM are the same as surface wind speeds of the JRA-25 reanalysis. The 3^rdgeneration wave model was driven to estimate wave parameters. It was found that changes in tropical cyclone activity due to warmer future SST conditions cause more occurrences of high-height, long-period, and northward significant waves in south of Japan. In the Bay of Bengal and Arabian Sea, more occurrences of high-height and long-period significant waves were found for all future SST conditions.