文献类型：期刊文献

英文题名：Estimation of kilometer-scale heat fluxes over a hilly area in Northern China using an optical-microwave scintillometer

作者：Zhang, Gong[1,2] Zhang, Jinsong[2] Meng, Ping[2]

第一作者：Zhang, Gong

通信作者：Zhang, JS[1]

机构：[1]Sun Yat Sen Univ, Sch Atmospher Sci, Southern Marine Sci & Engn Guangdong Lab Zhuahai, Zhuhai 519082, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forestry, Beijing 100091, Peoples R China

年份：2021

卷号：244

外文期刊名：AGRICULTURAL WATER MANAGEMENT

收录：;EI(收录号：20204409435367);Scopus(收录号：2-s2.0-85094326224);WOS:【SCI-EXPANDED(收录号:WOS:000603305400009)】；

基金：The authours are grateful for the two anonymous reviews whose comments have greatly improved the manuscript. We also would like to thank Pro. Han Bo and Dr. Liu Changwei for sharing the detailed methodology of soil heat and storage flux calculation, and Pro. Wang Hesong for helping to download LAI data. This work was supported by The National Key Research and Development Program of China (grant number, 2016YFC0500101; 2019YFA0607004); National Natural Science Foundation of China (grant number, 41675015).

语种：英文

外文关键词：Sensible heat fluxes; Latent heat fluxes; Two-wavelength method; Structure parameters; Scintillometer

摘要：Both sensible and latent heat fluxes are important components in the land surface energy budget, and accurately estimating them on kilometer-scale are important for understanding and modeling local hydro meteorological process. Scintillometry could provide kilometer-scale averaged turbulent heat fluxes, and has been used as ground-based remote sensing for estimating surface energy and water budget. This research compared heat fluxes obtained using an optical-microwave scintillometer (OMS) and an eddy covariance system (EC) over a typical temperate deciduous forest in hilly area, northern China. The observation period mainly represents growing season, from April to October 2018. We estimated the sensible and latent heat fluxes using both the two-wavelength method and the bichromatic correlation method, and the EC measurements were used as a benchmark. The results show the sensible heat fluxes from OMS showed 2% higher than EC, whilst the latent heat fluxes from OMS showed around 10% higher than EC. Changes in hydrological conditions or footprints have no significant effects on the measured turbulent fluxes from OMS. We also founded that there are slightly differences between fluxes derived by the two-wavelength method and the bichromatic correlation method due to assumed r(Tq) value. Based on these results, we conclude that OMS can be a reliable approach to measure kilometer-scale surface turbulent heat fluxes over the hilly area, and its ability to estimate kilometer-area sensible and latent heat fluxes looks promising.