DOI: 10.1002/2017JD026607
论文题名: Development and evaluation of the MTVDI for soil moisture monitoring
作者: Zhu W. ; Lv A. ; Jia S. ; Sun L.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2017
卷: 122, 期: 11 起始页码: 5533
结束页码: 5555
语种: 英语
英文关键词: MODIS
; soil moisture
; Ts − VI feature space
; TVDI
; TVX method
英文摘要: Several parameterization schemes have been developed to retrieve the soil moisture information involved in the remotely sensed surface temperature-vegetation index (Ts − VI) space. However, most of them are performed with the constraint of the dry edge of the Ts − VI space to define the maximum water stressed conditions. In view of the subjectivity and uncertainty involved in the determination of the dry edge, a new index termed as the Modified Temperature-Vegetation Dryness Index (MTVDI) was developed in this paper to reduce the reliance of the parameterization scheme on the dry edge. In the parameterization scheme of MTVDI, isopleth lines of soil moisture involved in the feature space were retrieved by the temperature-vegetation index method, and only the maximum surface temperature of bare soil (Tsmax) was indispensable in the definition of maximum water stressed conditions. For evaluation purpose, the MTVDI was demonstrated in the Southern Great Plains region of the U.S. and was compared with two other traditional soil moisture indexes developed under the constraint of dry edge. The comparison confirmed the effectivity of the MTVDI in monitoring the spatial pattern and seasonal variation of soil moisture. Our analyses also suggest that Tsmax, the only parameter needed in the definition of maximum water stressed conditions, can be retrieved directly from the parameterization scheme itself. Therefore, the retrieval of MTVDI can be performed independent of the dry edge, which is a significant improvement to the traditional parameterization schemes of soil moisture from the Ts − VI feature space. ©2017. The Authors. 资助项目: 41671026
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62650
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Key Laboratory of Water Cycle and Related Land Surface Processes, Chinese Academy of Sciences, Beijing, China; Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China; School of Geography, Beijing Normal University, Beijing, China
Recommended Citation:
Zhu W.,Lv A.,Jia S.,et al. Development and evaluation of the MTVDI for soil moisture monitoring[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(11)