干旱区生态环境知识资源中心(Arid): 黑河流域地表反照率估算及其时空特征分析

Arid

	黑河流域地表反照率估算及其时空特征分析
其他题名	Estimation of Land Surface Albedo and Spatio-Temporal Variability over Heihe River Basin
	吴胜标 1; 闻建光 1; 刘强 2; 窦宝成 1; 游冬琴 1
来源期刊	地球科学进展
ISSN	1001-8166
出版年	2015
卷号	30 期号:6 页码:680-690
中文摘要	基于不同空间尺度、长时间序列的地表反照率产品探究黑河流域20002012年的反照率时空变化特征。首先基于角度格网化(AB)算法对黑河流域30 m环境卫星一号HJ-1/CCD大气层顶方向反射率进行了地表反照率估算,作为高空间分辨率的地表反照率产品;选择同种算法计算的1 km空间分辨率的Global LAnd Surface Satellite(GLASS)反照率产品作为低空间分辨率反照率产品。结果表明:1利用AB算法反演的HJ卫星反照率具有较高精度,满足流域尺度反照率时空特征分析的精度要求;2黑河流域地表反照率空间分布差异显著,流域上游植被覆盖区域反照率较低,中下游荒漠地表反照率较高;3流域地表反照率的年内变化与季节性降雪和作物物候周期性变化一致。从季节变化角度,黑河流域反照率月平均值的年变化呈"U"字型,其中,冬季反照率最高,春季和秋季次之,夏季最低。从年际变化角度,黑河下游反照率呈上升趋势,上游和整个流域呈下降趋势。
英文摘要	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 30m 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.
中文关键词	黑河流域 ; 时空特征 ; 反照率
英文关键词	HJ-1/CCD Heihe River Basin HJ-1 /CCD Spatio-temporal pattern Albedo
语种	中文
国家	中国
收录类别	CSCD
WOS类目	METEOROLOGY ATMOSPHERIC SCIENCES
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:5472984
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232509
作者单位	1.中国科学院遥感与数字地球研究所, 遥感科学国家重点实验室, 北京 100101, 中国; 2.全球变化与地球系统科学研究院,北京师范大学, 北京 100875, 中国
推荐引用方式 GB/T 7714	吴胜标,闻建光,刘强,等. 黑河流域地表反照率估算及其时空特征分析[J]. 北京师范大学,2015,30(6):680-690.
APA	吴胜标,闻建光,刘强,窦宝成,&游冬琴.(2015).黑河流域地表反照率估算及其时空特征分析.地球科学进展,30(6),680-690.
MLA	吴胜标,et al."黑河流域地表反照率估算及其时空特征分析".地球科学进展 30.6(2015):680-690.