A STUDY ON PARAMETERIZATION OF LOCAL LAND-SURFACE PHYSICAL PROCESSES ON THE GOBI OF NORTHWEST CHINA
ZHANG QIANG 1,2 WANG SHENG 2 WEI GUOAN 2 1 Lanzhou Institute of Arid Meteorology, China Meteorological Administration,Lanzhou 730020,China 2 Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000,China
By utilizing the observational data of land-surface processes obtained during about one year from Aug. 2000 to Sep. 2001, the relationship of surface albedo over the gobi of the Dunhuang region with solar altitude angles and soil moisture as well as the relationship of soil heat conductivity with soil moisture are analyzed. Preliminarily a multiple factorial parameterization formulae of surface albedo and soil thermal conductivity based on long-term experiments are put forward. By comparison with observed values, it is found that the parameterization formulae fitted by using observational data can reflect the dynamic changes induced by some climatic factors such as precipitation well.