利用MODIS数据反演沙漠化地区地表温度的简化模式——以陕西北部地区为例

Simplified Split-window Algorithm Model to Retrieve Land Surface Temperature in Aeolian Desertification Area with MODIS Image Data——Taking North Shaanxi Province as an Example

利用MODIS数据可见光波段、近红外波段和中红外波段,获得提取地表温度所需要的2个基本参数:地表比辐射率和大气透过率;然后对热红外波段b31、b32运用劈窗算法提取出陕北地区地表温度;并利用两种不同经验公式参数得出的结果与相应位置气象观测站观测的卫星过境时刻的地表气温进行比较。结果表明,劈窗算法简化模式能获得较准确的地表温度,符合陕北地区的实际地表状况,印证了应用该简化模式可以在大范围内快速实时监测地表温度。

In this paper,two import parameters（surface emissive and atmospheric transmittance） are computed from the VIS,NIR and MIR of MODIS image data.The values of land surface temperature are calculated by means of a split-window method based on thermal infrared band（b31 and b32） of MODIS image data in North Shaanxi.Furthermore,the result from two different empirical formulas parameter is compared with the surface temperature from the corresponding position weather station observation at the time when the satellit...