气候变化领域集成服务门户(CCPortal): SMAP Detects Soil Moisture Under Temperate Forest Canopies

CCPortal

DOI	10.1029/2020GL089697
	SMAP Detects Soil Moisture Under Temperate Forest Canopies
	Colliander A.; Cosh M.H.; Kelly V.R.; Kraatz S.; Bourgeau-Chavez L.; Siqueira P.; Roy A.; Konings A.G.; Holtzman N.; Misra S.; Entekhabi D.; O'Neill P.; Yueh S.H.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:19
英文摘要	Soil moisture dynamics in the presence of dense vegetation canopies are determinants of ecosystem function and biogeochemical cycles, but the capability of existing spaceborne sensors to support reliable and useful estimates is not known. New results from a recently initiated field experiment in the northeast United States show that the National Aeronautics and Space Administration (NASA) SMAP (Soil Moisture Active Passive) satellite is capable of retrieving soil moisture under temperate forest canopies. We present an analysis demonstrating that a parameterized emission model with the SMAP morning overpass brightness temperature resulted in a RMSD (root-mean-square difference) range of 0.047–0.057 m3/m3 and a Pearson correlation range of 0.75–0.85 depending on the experiment location and the SMAP polarization. The inversion approach included a minimal amount of ancillary data. This result demonstrates unequivocally that spaceborne L-band radiometry is sensitive to soil moisture under temperate forest canopies, which has been uncertain because of lack of representative reference data. ©2020. The Authors.
英文关键词	Biogeochemistry; Correlation methods; Ecology; Forestry; NASA; Radiometry; Soil moisture; Biogeochemical cycle; Brightness temperatures; Ecosystem functions; L-band radiometry; Pearson correlation; Root mean square differences; Soil moisture dynamics; Space-borne sensor; Soil surveys; brightness temperature; ecosystem function; forest canopy; radiometer; satellite data; soil moisture; temperate forest; United States
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169614
作者单位	Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; USDA ARS Hydrology and Remote Sensing Laboratory, Beltsville, MD, United States; Cary Institute of Ecosystem Studies, Millbrook, NY, United States; Electrical and Computer Engineering, University of Massachusetts Amherst, Amherst, MA, United States; Michigan Tech Research Institute, Ann Arbor, MI, United States; Département des Sciences de l'Environnement, Université du Québec à Trois-Rivières, Trois-Rivières, QC, Canada; Department of Earth System Science, Stanford University, Stanford, CA, United States; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States; NASA Goddard Space Flight Center, Greenbelt, MD, United States
推荐引用方式 GB/T 7714	Colliander A.,Cosh M.H.,Kelly V.R.,et al. SMAP Detects Soil Moisture Under Temperate Forest Canopies[J],2020,47(19).
APA	Colliander A..,Cosh M.H..,Kelly V.R..,Kraatz S..,Bourgeau-Chavez L..,...&Yueh S.H..(2020).SMAP Detects Soil Moisture Under Temperate Forest Canopies.Geophysical Research Letters,47(19).
MLA	Colliander A.,et al."SMAP Detects Soil Moisture Under Temperate Forest Canopies".Geophysical Research Letters 47.19(2020).