摘要
地表特征参数的正确与否直接影响到区域陆面蒸散量估算精度,因此在区域非均匀陆面蒸散研究中,地表特征参数的获取方法是一个值得探讨的问题.与传统的方法相比,卫星遥感技术在求取地表特征参数时有其独特的优势.NOAA气象卫星AVHRR资料以其时间分辨率高、覆盖面广、价格低廉等优点广泛应用于非均匀陆面蒸散研究和应用中[1～6].本文建立了NOAA/AVHRR计算地表特征参数的参数化模型,选取中国东北松嫩平原西部地区2000年7月8日的AVHRR资料,试算了研究区地表温度、地表发射率、地表反照率、NDVI等主要地表特征参数,并且参照2000年研究区土地利用数据对各参数的空间分布特征及合理性进行了分析.
The estimation accuracy of the regional land-surface evaportranspiration depends firmly on a number of land-surface parameters, such as temperature, emissivity, Albedo and NDVI. Therefore, the retrieving method of the land-surface parameters is of the importance to be investigated in the field of regional evaportranspiration estimation over heterogeneous land surfaces. Comparing with the traditional method, retrieving the land-surface parameters from satellite remote sensed multispectral data has particular advantages. The NOAA/AVHRR data has been intensively applied to the study on land-surface evaportranspiration because of its high time resolution, large area coverage and low cost. In this paper the parameterization model of land-surface was established for NOAA/AVHRR data. The land-surface parameters were then calculated from the AVHRR data of July 8, 2000 over the study area of the western Songnen Plain in Northeastern China. The spatial distributing characteristics and rationality of the parameters were analyzed with the reference from the landuse data of same year.
出处
《地球物理学进展》
CSCD
2004年第3期672-677,共6页
Progress in Geophysics
基金
教育部高等学校优秀青年教师教学科研奖励计划资助.
