山岳域の陸面解析における雪氷融解プロセスに関する検討

Abstract

In Central Asia, since most of water resource is supplied in mountainous area in winter as snowfall, snow melting process is key factor to determine seasonal water resource. However, in the previous works with land surface model, there were early trends in the analysis and it was triggered by strong heat supply in mountainous region. In this research, several studies are conducted and they were assessed by satellite-based snow cover area and monthly river discharge data. First of all, analyses at deferent spatial resolutions were compared. Secondly, elevation mosaic scheme was developed to consider a mixture of altitude within each mesh. And finally, altitude dependency of meteorological forcing for land surface analysis was studied. As a result of them, model was improved especially in spring, but there are still early trends on it.