摘要
以Landsat TM影像反照率反演结果和MOD10A1逐日反照率产品为主要数据源, 对其反照率遥感资料进行精度验证, 然后根据这两种遥感数据资料对木孜塔格冰川表面反照率的时空变化特征进行分析, 并探讨了反照率与粉尘的关系.结果表明： 从空间上看, 冰川表面反照率具有明显的空间变化特征, 其数值介于0.508~0.637;总体上反照率随着海拔升高而增大, 在海拔5 950 m以上, 由于有裸岩的存在, 反照率开始下降.从年际变化上看, 在2000-2009年间木孜塔格冰川反照率年际变化波动较大, 并呈微弱的上升趋势, 速率约为0.0025 a-1.反照率与微粒个数呈现负相关关系.
In this paper, albedo dataset retrieved from Landsat TM/ETM＋ images and MOD10A1 daily albedo product are taken as the main data sources. Firstly, accuracy of the two albedo remote sensing data of Muztagh Glacier is verified. Then based on these two remote sensing data the temporal and spatial variations of surface albedo are analyzed. Finally, the relationship between albedo and dust is discussed. It is found that spatially, albedo of the Muztagh Glacier increases with altitude, ranging from 0.508 to 0.637. Overall albedo increases with altitude, but above 5 950 m a.s.l., due to the existence of bare rock albedo begins to decline. During the period of 2000-2009, albedo of the glacier appeared an obvious fluctuation, and increased slowly, with a rate of 0.0025 a-1. Albedo and particle number are negatively related, with a correlation coefficient r=-0.664 （P〈0.01）.
出处
《冰川冻土》
CSCD
北大核心
2013年第5期1133-1142,共10页
Journal of Glaciology and Geocryology
基金
全球变化研究国家重大科学研究计划项目(2010CB951404)
国家自然科学基金项目(40930526
41190084
40901041
41201063)资助
关键词
反照率
昆仑山木孜塔格冰川
遥感反演
时空变化
粉尘
albedo Muztagh Glacier in the Kunlun Mountains remote sensing retrieval temporal and spatial variation dust
