气候变化领域集成服务门户(CCPortal): Synergistic use of SMAP and OCO-2 data in assessing the responses of ecosystem productivity to the 2018 U.S. drought

CCPortal

DOI	10.1016/j.rse.2020.112062
	Synergistic use of SMAP and OCO-2 data in assessing the responses of ecosystem productivity to the 2018 U.S. drought
	Li X.; Xiao J.; Kimball J.S.; Reichle R.H.; Scott R.L.; Litvak M.E.; Bohrer G.; Frankenberg C.
发表日期	2020
ISSN	00344257
卷号	251
英文摘要	Soil moisture and gross primary productivity (GPP) estimates from the Soil Moisture Active Passive (SMAP) and solar-induced chlorophyll fluorescence (SIF) from the Orbiting Carbon Observatory-2 (OCO-2) provide new opportunities for understanding the relationship between soil moisture and terrestrial photosynthesis over large regions. Here we explored the potential of the synergistic use of SMAP and OCO-2 based data for monitoring the responses of ecosystem productivity to drought. We used complementary observational information on root-zone soil moisture and GPP (9 km) from SMAP and fine-resolution SIF (0.05°; GOSIF) derived from OCO-2 SIF soundings. We compared the spatial pattern and temporal evolution of anomalies of these variables over the conterminous U.S. during the 2018 drought, and examined to what extent they could characterize the drought-induced variations of flux tower GPP and crop yield data. Our results showed that SMAP GPP and GOSIF, both freely available online, could well capture the spatial extent and dynamics of the impacts of drought indicated by the U.S. Drought Monitor maps and the SMAP root-zone soil moisture deficit. Over the U.S. Southwest, monthly anomalies of soil moisture showed significant positive correlations with those of SMAP GPP (R2 = 0.44, p < 0.001) and GOSIF (R2 = 0.76, p < 0.001), demonstrating strong water availability constraints on plant productivity across dryland ecosystems. We further found that SMAP GPP and GOSIF captured the impact of drought on tower GPP and crop yield. Our results suggest that synergistic use of SMAP and OCO-2 data products can reveal the drought evolution and its impact on ecosystem productivity and carbon uptake at multiple spatial and temporal scales, and demonstrate the value of SMAP and OCO-2 for studying ecosystem function, carbon cycling, and climate change. © 2020 Elsevier Inc.
英文关键词	Carbon cycle; Crop yield; Dryland; Enhanced vegetation index; GOSIF; Gross primary production; Orbiting Carbon Observatory-2; Soil moisture; Soil Moisture Active Passive; Sun-induced chlorophyll fluorescence; Water stress
语种	英语
scopus关键词	Carbon; Climate change; Crops; Drought; Ecosystems; Photosynthesis; Plants (botany); Chlorophyll fluorescence; Ecosystem functions; Ecosystem productivity; Gross primary productivity; Positive correlations; Root zone soil moistures; Soil moisture active passive (SMAP); Spatial and temporal scale; Soil moisture; crop yield; data processing; drought; OCO; satellite data; soil moisture; spatiotemporal analysis; water availability
来源期刊	Remote Sensing of Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179124
作者单位	Earth Systems Research Center, Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH 03824, United States; Numerical Terradynamic Simulation Group, College of Forestry & Conservation, University of Montana, Missoula, MT, United States; Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, MD 20771, United States; Southwest Watershed Research Center, USDA-ARS, Tucson, AZ 85719, United States; Department of Biology, University of New Mexico, Albuquerque, NM 87131, United States; Department of Civil, Environmental and Geodetic Engineering, Ohio State University, Columbus, OH 43210, United States; Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, United States
推荐引用方式 GB/T 7714	Li X.,Xiao J.,Kimball J.S.,et al. Synergistic use of SMAP and OCO-2 data in assessing the responses of ecosystem productivity to the 2018 U.S. drought[J],2020,251.
APA	Li X..,Xiao J..,Kimball J.S..,Reichle R.H..,Scott R.L..,...&Frankenberg C..(2020).Synergistic use of SMAP and OCO-2 data in assessing the responses of ecosystem productivity to the 2018 U.S. drought.Remote Sensing of Environment,251.
MLA	Li X.,et al."Synergistic use of SMAP and OCO-2 data in assessing the responses of ecosystem productivity to the 2018 U.S. drought".Remote Sensing of Environment 251(2020).