文献类型：期刊文献

英文题名：Evaluating the Estimation of Net Radiation Based on MODIS Data and CoLM: A Case Study in the Tibetan Plateau

作者：Zhao, Lifang[1] Shen, Zhanfeng[1] Li, Chunming[2] Guo, Ming[3] Sun, Yuan[1] Gao, Lijing[1]

第一作者：Zhao, Lifang

通信作者：Shen, ZF[1]

机构：[1]Chinese Acad Sci, Inst Remote Sensing & Digital Earth, Beijing 100101, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forest Resource Informat Tech, Beijing 100091, Peoples R China;[3]Chinese Acad Surveying & Mapping, Beijing 100039, Peoples R China

年份：2019

卷号：12

期号：2

起止页码：460-470

外文期刊名：IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING

收录：;EI(收录号：20191106618062);Scopus(收录号：2-s2.0-85062588363);WOS:【SCI-EXPANDED(收录号:WOS:000460663600007)】；

基金：This work was supported in part by the National Key Research & Development (R& D) Program of China (2017YFB0504204; 2018YFB0505000; 2016YFB0502502) and in part by the National Natural Science Foundation of China (No. 41401420; 31570625).

语种：英文

外文关键词：Common land model (CoLM); modeling; MODIS land surface temperature (LST); net radiation; observation

摘要：Estimation of net radiation is essential for characterization of the land-atmosphere energy and water exchange processes of the Tibetan Plateau. Two methods are commonly used to estimate the net radiation. Method 1 relies on ground measurements and earth satellite observations, and method 2 relies on the use of a land surface model. Currently, there is no consensus on regarding which of these two methods is the most accurate. In this study, we evaluated net radiation calculated by MODIS land surface temperature products, combined with ground-based incoming shortwave and longwave radiation and albedo measurements, and compare this to performance of the common land model for modeling surface net radiation for the Muztaga site located in the northwest of the Tibetan Plateau at three timescales (half-hourly, hourly, and daily). The results show that the two methods provide similar results, and both methods provide estimates that are notably higher than ground-measured net radiation validations at three different timescales. Estimates of net radiation obtained at half-hourly and hourly timescales closely match the fluctuations in the reference data. However, the daily timescale is too coarse to capture the short-term fluctuations. Thus, this study demonstrates that the shorter timescales are preferred in determining surface net radiation. In addition, compared with method 2, method 1 is more accurate for each of the different timescales.