AVHRR分裂窗算法反演高山草甸地表温度精度评估  

Evaluation of Split-window Algorithms for Land Surface Temperature Retrieval from AVHRR Data over Alpine Meadow

作　　者：闵文彬[1] 李跃清[1] 

机构地区：[1]中国气象局成都高原气象研究所,成都610072

出　　处：《高原山地气象研究》2014年第2期44-47,共4页Plateau and Mountain Meteorology Research

基　　金：公益性行业(气象)科研专项经费项目GYHY201406001和GYHY201206041;川气课题2011-开发-09

摘　　要：利用理塘县高山草甸地表温度实测数据,分析6种常用AVHRR分裂窗算法的精度,为青藏高原地区地表温度的卫星反演提供技术支持。结果表明:6种常用AVHRR分裂窗算法反演地表温度与实测值之间有很好的线性正相关关系,反演温度与实测温度最大偏差3.36K,最大平均绝对误差2.25k,最小平均绝对误差0.77K。给出了反演高山草甸地表温度的AVHRR分裂窗算法建议。Six commonly used split -window algorithms for deriving land surface temperature （LST） from advanced very high resolution radiometer （AVHRR） are validated with in situ measurement （ T, ） over Litang alpine meadow. This purpose is to provide some technical supports on the split- window algorithm selection over the Tibetan Plateau. Results show that there are significant linear correlations between the land surface temperatures derived by the six algorithms and the in situ measure- ments. The maximum deviation of LST and T is 2. 35K. The maximum mean absolute error is 1.33 K ,while the minimum is 0. 49K . Two split - window algorithms are suggested for deriving alpine meadow surface temperature from AVHRR.

关 键 词：分裂窗算法 地表温度 AVHRR 高山草甸 

分 类 号：P423.7[天文地球—大气科学及气象学]