globalchange  > 科学计划与规划
DOI: 10.1002/2016GL069946
论文题名:
SMAP soil moisture drying more rapid than observed in situ following rainfall events
作者: Shellito P.J.; Small E.E.; Colliander A.; Bindlish R.; Cosh M.H.; Berg A.A.; Bosch D.D.; Caldwell T.G.; Goodrich D.C.; McNairn H.; Prueger J.H.; Starks P.J.; van der Velde R.; Walker J.P.
刊名: Geophysical Research Letters
ISSN: 0094-8775
EISSN: 1944-8506
出版年: 2016
卷: 43, 期:15
起始页码: 8068
结束页码: 8075
语种: 英语
英文关键词: drydown ; in situ monitoring ; Soil Moisture Active Passive (SMAP) ; validation
Scopus关键词: Curve fitting ; Drying ; Moisture ; Moisture control ; NASA ; Probes ; Rain ; Soils ; Drydown ; Exponential curves ; In- situ monitoring ; In-situ measurement ; In-situ observations ; Soil moisture active passive (SMAP) ; Surface soil moisture ; Validation ; Soil moisture ; in situ measurement ; magnitude ; model validation ; probe ; rainfall ; research program ; soil depth ; soil moisture ; soil surface ; timescale
英文摘要: We examine soil drying rates by comparing surface soil moisture observations from the NASA Soil Moisture Active Passive (SMAP) mission to those from networks of in situ probes upscaled to SMAP's sensing footprint. SMAP and upscaled in situ probes record different soil drying dynamics after rainfall. We modeled this process by fitting an exponential curve to 63 drydown events: the median SMAP drying timescale is 44% shorter and the magnitude of drying is 35% greater than in situ measurements. We also calculated drying rates between consecutive observations from 193 events. For 6 days after rainfall, soil moisture from SMAP dries at twice the rate of in situ measurements. Restricting in situ observations to times of SMAP observations does not change the drying timescale, magnitude, or rate. Therefore, observed differences are likely due to differences in sensing depths: SMAP measures shallower soil moisture than in situ probes, especially after rainfall. ©2016. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84981340961&doi=10.1002%2f2016GL069946&partnerID=40&md5=821e72594cafa563f70e1c731ae230ba
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9738
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: Department of Geological Sciences, University of Colorado Boulder, Boulder, CO, United States

Recommended Citation:
Shellito P.J.,Small E.E.,Colliander A.,et al. SMAP soil moisture drying more rapid than observed in situ following rainfall events[J]. Geophysical Research Letters,2016-01-01,43(15).
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