基于MODIS的黄河中游地表反照率时空变化特征

摘要

[目的]研究基于MODIS的黄河中游地表反照率时空变化.[方法]利用2001 ～ 2010年MODIS地表反照率产品(MCD43 B3)以及气象站降水和气温数据,采用简单相关分析和偏相关分析方法,研究了黄河中游地区地袁反照率时空分布特征及其与降水、气温的相关关系.[结果]研究区地表反照率年内年际波动变化,不同地表覆盖类型地表反照率年平均值大小顺序为耕地＞建设用地＞草地＞林地.不同地形、地表覆盖类型地表反照率与降水和气温的相关关系不同.[结论]该研究为中长期气候预报水平的提高提供理论依据.%[Objective] The research aimed to study the spatial and temporal variation characteristics of surface ALBEDO in the middle Yellow River based on remote sensing. [ Method] Based on the MODIS/MCD43B3 and the rainfall and temperature of weather stations data set from 2001 to 2010 years, used pearson correlation analysis and partial correlation analysis,the spatial and temporal variation characteristics of surface ALBEDO and the relationship between ALBEDO and rainfall and temperature of the Middle Yellow River. Were sudied. [ Result] The results indicated that the study area of ALBEDO has the feature of fluctuation change, the order of ALBEDO with different land-surface cover of the yearly average is: plantation > land of construction > grassland > forest land. The correlation between ALBEDO and rainfall and temperature is diversity in different terrain, land-surface cover type. [Conclusion] The study provides the theoretical basis for raising the level of long-term climate forecasting.