GSTDTAP  > 资源环境科学
DOI10.1029/2018WR023166
Global Dynamics of Stored Precipitation Water in the Topsoil Layer From Satellite and Reanalysis Data
Kim, Hyunglok; Lakshmi, Venkat
2019-04-01
发表期刊WATER RESOURCES RESEARCH
ISSN0043-1397
EISSN1944-7973
出版年2019
卷号55期号:4页码:3328-3346
文章类型Article
语种英语
国家USA
英文摘要

The amount of soil water in the topsoil layer (from 0 to 10 cm) has been regarded as a key factor in controlling land-atmosphere interaction by determining the fraction of net radiation. In the present study, we investigate spatial trends of the stored precipitation fraction in the topsoil layer for varying vegetation and aridity indices by utilizing four satellites and two reanalysis data sets on a global scale. Using the Budyko framework, we relate climate regimes to the stored precipitation fraction on a global scale. A positive relation between the stored precipitation fraction with aridity index and a negative relation between the stored precipitation fraction and free parameter, vegetation optical depth, and isohydric slope are discovered. Even though the stored precipitation fraction values were calculated from different soil moisture and precipitation sources, they share an similar spatial trend: the drier and less vegetated the soil is, the more precipitation is retained in the top layer of the soil. Specifically, the topsoil retains 37% +/- 11% of precipitated water three days after a rainfall event where the aridity index was greater than 5. Over wet and forest areas, due to large runoff fluxes and plants intercepting water before the precipitated water reached the ground, the topsoil retains 21% +/- 2% of precipitated water three days after a rainfall event. Furthermore, by using the modeled data sets in the calculation of the stored precipitation fraction metric, we are able to conduct a sensitivity analysis of F-P(f) metrics with respect to different sampling frequency values.


领域资源环境
收录类别SCI-E
WOS记录号WOS:000468597900041
WOS关键词SOIL-MOISTURE PRODUCT ; ASSIMILATION ; VALIDATION ; SMAP ; METHODOLOGY ; TEMPERATURE ; RETRIEVAL ; EXTREMES ; IMPACT ; DEPTH
WOS类目Environmental Sciences ; Limnology ; Water Resources
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/182246
专题资源环境科学
作者单位Univ Virginia, Dept Engn Syst & Environm, Charlottesville, VA 22903 USA
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Kim, Hyunglok,Lakshmi, Venkat. Global Dynamics of Stored Precipitation Water in the Topsoil Layer From Satellite and Reanalysis Data[J]. WATER RESOURCES RESEARCH,2019,55(4):3328-3346.
APA Kim, Hyunglok,&Lakshmi, Venkat.(2019).Global Dynamics of Stored Precipitation Water in the Topsoil Layer From Satellite and Reanalysis Data.WATER RESOURCES RESEARCH,55(4),3328-3346.
MLA Kim, Hyunglok,et al."Global Dynamics of Stored Precipitation Water in the Topsoil Layer From Satellite and Reanalysis Data".WATER RESOURCES RESEARCH 55.4(2019):3328-3346.
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