基于改进的地表温度-植被覆盖特征空间估算地表蒸散(英文)

被引:5
作者
孙亮 [1 ,2 ,3 ,4 ]
孙睿 [1 ,2 ,3 ]
李小文 [1 ,2 ,3 ]
陈怀亮 [5 ]
张雪芬 [5 ]
机构
[1] 遥感科学国家重点实验室
[2] 北京师范大学地理学与遥感科学学院
[3] 环境遥感与数字城市北京市重点实验室
[4] 北京师范大学全球变化与地球系统科学研究院
[5] 河南省气象科学研究所
关键词
蒸散; 显热通量; 地表温度; 植被覆盖;
D O I
暂无
中图分类号
P426.2 [蒸发与蒸散];
学科分类号
0706 ; 070601 ;
摘要
地表温度-植被指数特征空间被广泛应用与地表蒸散估算和土壤湿度监测,而利用散点图直接拟合干边会造成很大的不确定性。本研究采用改进的地表温度-植被覆盖特征空间进行地表通量的计算。该方法是基于能量平衡公式进行干边定位,从而减少干边确定过程中的不确定性。我们选取的17天的MODIS数据以及相应气象数据进行地表蒸散计算,并采用郑州的LAS观测站验证显热通量计算值,估算结果均方根误差(RMSE)、偏差(Bias)和相关系数平方(R2)分别为44.06Wm-2、36.99Wm-2和0.71。总体来讲,通过能量平衡公式确定的理论干边相比通过散点图拟合的实测干边更合理。
引用
收藏
页码:225 / 231
页数:7
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