【摘要】 在稀疏植被区陆面过程遥感参数化基础上,利用MODIS/500m分辨率的资料反演黄土高原2007年5～10月陆面过程的特征参数。分析得出:(1)受多种气候系统的影响,黄土高原降水、植被分布以及土壤湿度等存在南北、东西差异,导致反照率呈现出从东南到西北部逐渐增加的趋势;5～10月,频率峰值所对应的反照率值呈现出先降低后增加的特征,到7月反照率值达到最低。(2)由于土壤湿度和植被覆盖度空间分布的差异,出现了3种反照率和能量分布型,即宽频低峰型、高频窄峰型和多峰型分布。(3)由于2007年8～10月黄土高原降水量比较充沛,大部分区域的土壤湿度都在60%以上,使得净辐射量、感热通量、潜热通量频率分布比较集中。更多还原

【Abstract】 On the basic of remote sensing parameterization of land surface process in sparse vegetation,the characteristic parameters over Loess Plateau in May~October 2007 are retrieved by using the MODIS data with 500 m resolutions.The results show that: (1) Effect of due to multiple climate factors,such as,the precipitation,vegetation distribution and soil humidity in Loess Plateau are different in the south and north,and in the east and west,which result in albedo increasing from southeast to northwest.With season changing the peak value of the albedo frequency is first decreased,the albedo reaches to the low value in July,then albedo is increased.(2) Due to disagree distribution between the soil humidity and vegetation coverage appear three distributing patterns,namely wide frequency and low peak pattern,high frequency and narrow peak pattern,and multi-peak pattern.(3) Because of abundant precipitation from August to October in 2007,the soil humidity in most of regions is more than 60%,and the energy flux in Loess Plateau is stable and concentrating.更多还原