中国典型土地覆盖类型地表反照率的年内变化特征_英文_刘正佳.pdf

J. Geogr. Sci. 2015, 25(1): 35-44 DOI: 10.1007/s11442-015-1151-5 © 2015 Science Press Springer-Verlag Intra-annual variability of satellite observed surface albedo associated with typical land cover types in China 1,2 * 1 1,2 1,2 LIU Zhengjia , SHAO Quanqin , TAO Jian , CHI Wenfeng 1. Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Re- sources Research, CAS, Beijing 100101, China; 2. University of Chinese Academy Sciences, Beijing 100049, China Abstract: Surface albedo is a primary causative variable associated with the process of sur- face energy exchange. Numerous studies have examined diurnal variation of surface albedo at a regional scale; however, few studies have analyzed the intra-annual variations of surface albedo in concurrence with different land cover types. In this study, we amalgamated surface albedo product data (MCD43) from 2001 to 2008, land-use data (in 2000 and 2008) and land cover data (in 2000); quantitative analyses of surface albedo variation pertaining to diverse land cover types and the effect of the presence/absence of ground snow were undertaken. Results indicate that intra-annual surface albedo values exhibit flat Gaussian or triangular distributions depending upon land cover types. During snow-free periods, satellite observed surface albedo associated with the non-growing season was lower than that associated with the growing season. Satellite observed surface albedo during the presence of ground snow period was 2–4 times higher than that observed during snow-free periods. Surface albedo reference values in typical land cover types have been calculated; notably, grassland, crop- land and built-up land were associated with higher surface albedo reference values than ba