Arid Zone Research ›› 2020, Vol. 37 ›› Issue (6): 1396-1405.doi: 10.13866/j.azr.2020.06.04

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Spatiotemporal variation of albedo of four representative glaciers in the Heihe River Basin based on multi-source data

WANG Jun-yao, HUAI Bao-juan, WANG Ye-tang, SUN Wei-jun, ZHANG Wu-ying   

  1. (College of Geography and Environment, Shandong Normal University, Jinan 250300, Shandong, China)
  • Received:2020-01-03 Revised:2020-03-23 Online:2020-11-15 Published:2021-01-24

Abstract: Glacier albedo is a critical parameter that controls the process of radiation budget, the fluctuation of which directly affects the change in glacier energy-mass balance. By remote sensing, studies on the characteristics of glacier albedo and its spatiotemporal distribution can be taken as an important reference for estimating glacier melting and downstream river runoff. In this study, albedo dataset retrieved from Landsat TM/ETM+ images and MOD10A1 daily albedo product were used as the main data sources, and Landsat TM/ETM+ images and MOD10A1 data’error were analyzed by field measurements. Then, the spatiotemporal variations of albedo were investigated on four representative glaciers in Heihe River Basin of MOD10A1 from 2000 to 2018. The results showed that there was a certain bias between albedo value derived from MOD10A1 products and ground measured, but the time series was similar; there is a difference in inversion results between MOD10A1 and Landsat TM/ETM+, suggesting a good applicability of glacier albedo in Heihe River Basin. On the interannual scale, the albedo of four glaciers was decreasing. Among the spatial scale, the annual average albedo of Bayi glacier was the highest, followed by Yanglonghe glacier No. 5, Qiyi glacier, and Shiyi glacier; the average albedo of Yanglonghe glacier No. 5 was the highest in the ablation season, followed by the Qiyi glacier, Bayi glacier, and Shiyi glacier.