气候变化领域集成服务门户(CCPortal): Approaches to assessing the daily average ground surface soil heat flux on a regional scale over the Qinghai-Tibet Plateau

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DOI	10.1016/j.agrformet.2023.109494
	Approaches to assessing the daily average ground surface soil heat flux on a regional scale over the Qinghai-Tibet Plateau
	Yang, Cheng; Wu, Tonghua; Hu, Guojie; Zhu, Xiaofan; Yao, Jimin; Li, Ren; Zhao, Lin; Zhang, Yinghui
发表日期	2023
ISSN	0168-1923
EISSN	1873-2240
卷号	336
英文摘要	The daily average ground surface soil heat flux (G0_daily) has been widely applied in land surface models. The accuracy of modeling G0_daily greatly impacts the estimation of the evapotranspiration and heat and moisture exchanges between the atmosphere and ground surface in frozen ground regions. We propose two methods for estimating G0_daily over the Qinghai-Tibet Plateau (QTP): the combination method (CM) and the sine method (SM). The instantaneous surface soil heat flux (G0_ins) is estimated at multiple times per day using the CM, and then, G0_daily is obtained. The SM simulates G0_daily by estimating G0_ins during the satellite transit based on the diurnal variation in the sinusoidal curves of G0_ins under clear-sky conditions. For G0_ins, the root mean square error (RMSE) and coefficient of determination (R2) of the CM are more than 10 W/m2 lower and 0.12 higher than those of the surface energy balance system (SEBS), respectively. For G0_daily, at the four sites (TGLMS, Naqu, Biru, and Nierong), the RMSE and the correlation coefficient (R) values of the CM are better than those of the SM by -0.86 W/m2, 9.04 W/m2, 4.33 W/m2, and 2.55 W/m2 and 0.19, 0.12, 0.10, and 0.08, respectively. The CM is applicable under all weather conditions and multi-period and multi-parameter observations throughout a day. Due to the principle of the SM, it can only simulate G0_daily when the satellite observes at least once each in the daytime and nighttime under clear-sky conditions. The SM overcomes the shortcomings of the CM, i.e., the requirements of complex input parameters and a large data volume. The advantage of the high spatial resolution of polar-orbiting satellite remotely sensed data (such as Moderate Resolution Imaging Spectroradiometer (MODIS) data) is given full play by the SM.
关键词	Qinghai-Tibet Plateau Daily average ground surface soil heat flux Remote sensing-based model Combination method Sine method
英文关键词	NET-RADIATION; ENERGY BUDGET; CANOPY; TEMPERATURE; EVAPORATION; VEGETATION; MODEL
WOS研究方向	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000998449200001
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282807
作者单位	Hebei Normal University; Chinese Academy of Sciences; Nanjing University of Information Science & Technology; Chinese Academy of Sciences; Institute of Geographic Sciences & Natural Resources Research, CAS
推荐引用方式 GB/T 7714	Yang, Cheng,Wu, Tonghua,Hu, Guojie,et al. Approaches to assessing the daily average ground surface soil heat flux on a regional scale over the Qinghai-Tibet Plateau[J],2023,336.
APA	Yang, Cheng.,Wu, Tonghua.,Hu, Guojie.,Zhu, Xiaofan.,Yao, Jimin.,...&Zhang, Yinghui.(2023).Approaches to assessing the daily average ground surface soil heat flux on a regional scale over the Qinghai-Tibet Plateau.AGRICULTURAL AND FOREST METEOROLOGY,336.
MLA	Yang, Cheng,et al."Approaches to assessing the daily average ground surface soil heat flux on a regional scale over the Qinghai-Tibet Plateau".AGRICULTURAL AND FOREST METEOROLOGY 336(2023).