基于MODIS数据的青藏高原冰川反照率时空分布及变化研究

doi:10.7522/j.issn.1000-0240.2018.0094

冰川冻土 ›› 2018, Vol. 40 ›› Issue (5): 875-883.doi: 10.7522/j.issn.1000-0240.2018.0094

基于MODIS数据的青藏高原冰川反照率时空分布及变化研究

徐田利^1,2, 邬光剑^1,3, 张学磊⁴, 燕妮^1,2, 杨松¹

1. 中国科学院青藏高原研究所青藏高原环境变化与地表过程重点实验室, 北京 100101;
2. 中国科学院大学, 北京 100049;
3. 中国科学院青藏高原地球科学系统卓越创新中心, 北京 100101;
4. 中国科学院东北地理与农业生态研究所, 吉林长春 130102

收稿日期:2018-01-05 修回日期:2018-10-01 出版日期:2018-10-25 发布日期:2018-12-10
作者简介:徐田利(1984-),男,山东临沂人,工程师,2017年在中国科学院大学获博士学位,从事青藏高原雪冰反照率观测研究.E-mail:xutianli@itpcas.ac.cn.
基金资助:
国家自然科学基金项目（41725001）；中国科学院战略性先导科技专项（XDA20060201）资助

Albedo on glaciers in the Tibetan Plateau based on MODIS data: spatiotemporal distribution and variation

XU Tianli^1,2, WU Guangjian^1,3, ZHANG Xuelei⁴, YAN Ni^1,2, YANG Song¹

1. Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Chinese Academy of Sciences Center for Excellence in Tibetan Plateau Earth System, Beijing 100101, China;
4. Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China

Received:2018-01-05 Revised:2018-10-01 Online:2018-10-25 Published:2018-12-10

摘要/Abstract

摘要： 冰川反照率对冰川融化具有重要影响，以2000-2013年MODIS的MOD10A1逐日积雪反照率数据资料为基础，分析了青藏高原冰川反照率的时空分布及变化。结果表明：冰川年平均反照率变化范围是0.42（枪勇冰川）~0.75（PT5冰川），其中夏季平均反照率变化范围是0.45（来古冰川）~0.69（东绒布冰川和古里雅冰川）。冰川反照率空间分布并没有明显的规律性，而冰川反照率的变化速率空间分布规律明显——南部较大往北减小，北部反照率出现增大现象。研究区内大部分冰川反照率呈波动降低的趋势，年平均反照率和夏季平均反照率变化速率最大值都出现在枪勇冰川，分别是-0.015 a^-1和-0.019 a^-1。木吉和木孜塔格冰川年平均和夏季平均冰川反照率都增大，木吉冰川是由于2012年的高反照率引起的，而木孜塔格冰川主要与该地区气温降低、降水增多有关。

关键词: 青藏高原, 冰川反照率, 时空分布, 变化速率, MODIS

Abstract: Glacier albedo plays a crucial role in glacier melting. Based on the daily snow albedo data derived from the MODIS product MOD10A1 spanning from 2000 to 2013, in this study, the spatial and temporal distributions and variation of the albedo on Tibetan glaciers were analyzed. It was showed that the annual average albedo ranged from 0.42 (Qiangyong Gl.) to 0.75 (PT5 Gl.), while the summer average albedo varied from 0.45 (Laigu Gl.) to 0.69 (East Rongbuk Gl. and Guliya Gl.). There was no obvious regularity in the spatial albedo distribution, whereas there was apparently regular in the spatial distribution of temporal variation grade for glacier albedo:the glacier albedo in the southern Tibet was larger than that in other regions and reducing northwards, and the albedo on the northern Tibet appeared to increase with time. Albedo on most glaciers showed a declining trend, with the maximum annual mean albedo and summer albedo changing rates of 0.015 a^-1 and -0.019 a^-1, respectively, both of which appeared on the Qianyong Glacier. In addition, the Muji Glacier and Muztagh Glacier had annual average albedo and summer albedo increased. High albedo on Muji Glacier was caused by high albedo in 2012, while that on Muztagh was associated with reducing air temperature and increasing precipitation.

Key words: Tibetan Plateau, glacier albedo, spatiotemporal distribution, changing rate of glacier albedo, MODIS

中图分类号:

P343.6

徐田利, 邬光剑, 张学磊, 燕妮, 杨松. 基于MODIS数据的青藏高原冰川反照率时空分布及变化研究[J]. 冰川冻土, 2018, 40(5): 875-883.

XU Tianli, WU Guangjian, ZHANG Xuelei, YAN Ni, YANG Song. Albedo on glaciers in the Tibetan Plateau based on MODIS data: spatiotemporal distribution and variation[J]. Journal of Glaciology and Geocryology, 2018, 40(5): 875-883.

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基于MODIS数据的青藏高原冰川反照率时空分布及变化研究

Albedo on glaciers in the Tibetan Plateau based on MODIS data: spatiotemporal distribution and variation

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