Review of the study on land surface process in soil freezing and tha wing

Freezing soil is a natural phenomina in cold and mountain areas,which has great impact on the regional climate,water cycle,and water balance.The land surface process in the condition of soil freezing and thawing is one of the most important process in the area.This paper firstly reviews the present study on land surface process in the condition of soil freezing and thawing,especially the development after the the hydrological land surface model introduced into the study of General Circulation Model,then introduces the undergoing international research project,such as Project for Intercomparison of Land-surface Parameterization Schemes and Cold Land Process Field Experiment by NASA,and finally analyses and puts forward the future research field and topics.