Advances in Earth Science ›› 2015, Vol. 30 ›› Issue (6): 680-690. doi: 10.11867/j.issn.1001-8166.2015.06.0680

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Estimation of Land Surface Albedo and Spatio-Temporal variability over Heihe River Basin

Wu Shengbiao 1, 2, Wen Jianguang 1, Liu Qiang 3, Dou Baocheng 1, 2, You Dongqin 1, 2   

  1. 1. State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth of Chinese Academy of Sciences,Beijing 100101,China; 2. University of Chinese Academy of Sciences,Beijing 10049,China; 3. College of Global Change and Earth System Science, Beijing Normal University,Beijing 100875,China
  • Online:2015-06-25 Published:2015-06-25

Wu Shengbiao, Wen Jianguang, Liu Qiang, Dou Baocheng, You Dongqin. Estimation of Land Surface Albedo and Spatio-Temporal variability over Heihe River Basin[J]. Advances in Earth Science, 2015, 30(6): 680-690.

We used both high resolution with short-term albedo and moderate resolution with long-term albedo products to analyze the spatial-temporal characteristis of the Heihe River Basin during the years of 2000-2012. The 30 m land surface albedo product derived from HJ-1/CCD image by Angular Bin(AB) algorithm was evaluated through ground Automatic Weather Stations (AWS) measurements and compared with Global LAnd Surface Satellite (GLASS) albedo product.The spatial and temporal heterogeneity of land surface albedo over the Heihe River Basin were investigated by using both the HJ albedo product and GLASS albedo product. Preliminary validation results show that the HJ albedo product is well consistent with field measurements. The spatial patterns of annual average albedo during 2000-2012 are heterogeneous across the Heihe River Basin,lower in the upstream covered with vegetation and higher in the middle and down reaches of the desert. The heterogeneity of land surface albedo is consistent with the seasonal snowfall and the phenological cycles of crop. The albedo of upstream decreases year by year,while the downstream and the total basin increased. The annual cycles of albedo present an U-shape. The albedo has an obvious seasonal difference,which is highest in winter,followed by spring and autumn,lowest in summer.

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