Branch Seminar Series: Song-You Hong

Yonsei University, Seoul, South Korea
With the advances in numerical technique and refined physical packages, the regional climate model (RCM) has been applied to regional impact assessments studies based on various climate change scenarios derived from general circulation models (GCMs). As computer resources become feasible, application of the RCM expands to the real-time seasonal forecast. On the other hand, the RCM was found to be a useful research tool in understanding the role of the internal forcing embedded within the large-scale forcing. In this talk, results on the monsoon process studies using the NCEP regional spectral model are presented. By the virtues of the fact that the large-scale circulation is forced to remain realistic by the use of reanalysis boundary conditions, and that the regional model provides no feedback to the large scale, this talk attempts to identify the role of external forcing such as soil moisture and snow in forming the monsoonal circulations. Uncertainties in regional downscaling of the GCM results are also to be discussed.