气候变化领域集成服务门户(CCPortal): From the Ground to Space: Using Solar-Induced Chlorophyll Fluorescence to Estimate Crop Productivity

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DOI	10.1029/2020GL087474
	From the Ground to Space: Using Solar-Induced Chlorophyll Fluorescence to Estimate Crop Productivity
	He L.; Magney T.; Dutta D.; Yin Y.; Köhler P.; Grossmann K.; Stutz J.; Dold C.; Hatfield J.; Guan K.; Peng B.; Frankenberg C.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:7
英文摘要	Timely and accurate monitoring of crops is essential for food security. Here, we examine how well solar-induced chlorophyll fluorescence (SIF) can inform crop productivity across the United States. Based on tower-level observations and process-based modeling, we find highly linear gross primary production (GPP):SIF relationships for C4 crops, while C3 crops show some saturation of GPP at high light when SIF continues to increase. C4 crops yield higher GPP:SIF ratios (30–50%) primarily because SIF is most sensitive to the light reactions (does not account for photorespiration). Scaling to the satellite, we compare SIF from the TROPOspheric Monitoring Instrument (TROPOMI) against tower-derived GPP and county-level crop statistics. Temporally, TROPOMI SIF strongly agrees with GPP observations upscaled across a corn and soybean dominated cropland (R2 = 0.89). Spatially, county-level TROPOMI SIF correlates with crop productivity (R2 = 0.72; 0.86 when accounting for planted area and C3/C4 contributions), highlighting the potential of SIF for reliable crop monitoring. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Chlorophyll; Fluorescence; Food supply; Productivity; Chlorophyll fluorescence; Crop monitoring; Crop productivity; Gross primary production; Monitoring instruments; Photorespiration; Planted areas; Process-based modeling; Crops; Glycine max; Zea mays
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/170483
作者单位	Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, United States; Now at Department of Plant Sciences, University of California, Davis, CA, United States; Now at Department of Civil Engineering, Indian Institute of Science, Bangalore, India; Department of Atmospheric Sciences, University of California, Los Angeles, CA, United States; Now at Institute of Environmental Physics, University of Heidelberg, Heidelberg, Germany; National Laboratory for Agriculture and the Environment, USDA-ARS, Ames, IA, United States; Department of Natural Resources and Environmental Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States; National Center for Supercomputing Applications, University of Illinois at Urbana-Champaign, Urbana, IL, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States
推荐引用方式 GB/T 7714	He L.,Magney T.,Dutta D.,et al. From the Ground to Space: Using Solar-Induced Chlorophyll Fluorescence to Estimate Crop Productivity[J],2020,47(7).
APA	He L..,Magney T..,Dutta D..,Yin Y..,Köhler P..,...&Frankenberg C..(2020).From the Ground to Space: Using Solar-Induced Chlorophyll Fluorescence to Estimate Crop Productivity.Geophysical Research Letters,47(7).
MLA	He L.,et al."From the Ground to Space: Using Solar-Induced Chlorophyll Fluorescence to Estimate Crop Productivity".Geophysical Research Letters 47.7(2020).