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The spatial heterogeneity of land surface conditions and its influence on surface fluxes over a typical underlying surface in the Tibetan Plateau
Sun, GH (Sun, Genhou)1; Hu, ZY (Hu, Zeyong)1,2; Wang, JM (Wang, Jiemin)1; Ma, WQ (Ma, Weiqiang)2,3; Gu, LL (Gu, Lianglei)1; Sun, FL (Sun, Fanglin)1; Xie, ZP (Xie, Zhipeng)1,4; Yan, XQ (Yan, Xiaoqiang)1
Source PublicationTHEORETICAL AND APPLIED CLIMATOLOGY
2019
Volume135Issue:43832Pages:221-235
DOI10.1007/s00704-018-2369-9
Abstract

Accurately estimating the surface fluxes of over the heterogeneous land surface in Tibetan Plateau will be helpful to advance the understanding of its influence on regional climate and hydrology. This paper presents a study on the spatial heterogeneity of land surface parameters in terms of the spatial variability and spatial structure of land surface parameters and the influence on surface fluxes over a typical land surface in Tibetan Plateau. The results suggest that the sensible heat fluxes (H) and latent heat fluxes (LE) in the study area in the rain and dry seasons show apparent spatial variabilities due to the spatial heterogeneity in the leaf area index (LAI) and land surface undulations. The relative frequency distribution of H and LE at the spatial resolution of 30 m suggests that the spatial variability of surface fluxes has a close relationship with the spatial heterogeneity of land surface temperature (LST) and LAI. The variogram analyses of LST, LAI, H, and LE in the study area in rain season indicate that the spatial structures of LST and LAI are different and the spatial structures of H and LE are strongly influenced by the spatial structures of LST and LAI in both rain and dry seasons. The optimal pixel sizes for LST, LAI, H, and LE in the study area are 506, 156, 500, and 225 m in the rain season. The optimal pixel sizes for LST, H, and LE in the study area are 165, 165, and 162 m in the dry season. An analysis of the relative frequency distributions (RFDs) of the LST, LAI, H, and LE at different spatial resolutions in the rain and dry seasons reveals that their values at the maximum relative frequency keep stable although their spatial variabilities become weak as the spatial resolution decreases. The averages of LST, LAI, H, and LE of different spatial resolutions of the study area in rain and dry seasons vary within small ranges, suggesting that the influence of spatial resolution on the averaged land surface parameters and surface fluxes in the study area is small. This work will be helpful for the accurate estimation of the surface fluxes over a large heterogeneous land surface for regional climate modeling in Tibetan Plateau.

Subject AreaAtmospheric Sciences
WOS IDWOS:000459226500016
Language英语
Indexed BySCI
KeywordMt. Everest Region Vegetation Indexes Heat Fluxes Energy Temperature Model Aster Sebs Coefficients Qomolangma
WOS Research AreaMeteorology & Atmospheric Sciences
WOS SubjectMeteorology & Atmospheric Sciences
Cooperation Status国内
ISSN0177-798X
Department环境变化与地表过程
URL查看原文
PublisherSPRINGER WIEN
SubtypeArticle
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/9448
Collection图书馆
Corresponding AuthorSun, GH (Sun, Genhou)
Affiliation1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Gansu, Peoples R China;
2.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China;
3.Chinese Acad Sci, Inst Tibetan Plateau, Beijing 100101, Peoples R China;
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
Recommended Citation
GB/T 7714
Sun, GH ,Hu, ZY ,Wang, JM ,et al. The spatial heterogeneity of land surface conditions and its influence on surface fluxes over a typical underlying surface in the Tibetan Plateau[J]. THEORETICAL AND APPLIED CLIMATOLOGY,2019,135(43832):221-235.
APA Sun, GH .,Hu, ZY .,Wang, JM .,Ma, WQ .,Gu, LL .,...&Yan, XQ .(2019).The spatial heterogeneity of land surface conditions and its influence on surface fluxes over a typical underlying surface in the Tibetan Plateau.THEORETICAL AND APPLIED CLIMATOLOGY,135(43832),221-235.
MLA Sun, GH ,et al."The spatial heterogeneity of land surface conditions and its influence on surface fluxes over a typical underlying surface in the Tibetan Plateau".THEORETICAL AND APPLIED CLIMATOLOGY 135.43832(2019):221-235.
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