气候变化领域集成服务门户(CCPortal): Plant Water Uptake Thresholds Inferred From Satellite Soil Moisture

CCPortal

DOI	10.1029/2020GL087077
	Plant Water Uptake Thresholds Inferred From Satellite Soil Moisture
	Bassiouni M.; Good S.P.; Still C.J.; Higgins C.W.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:7
英文摘要	Empirical functions are widely used in hydrological, agricultural, and Earth system models to parameterize plant water uptake. We infer soil water potentials at which uptake is downregulated from its well-watered rate and at which uptake ceases, in biomes with <60% woody vegetation at 36-km grid resolution. We estimate thresholds through Bayesian inference using a stochastic soil water balance framework to construct theoretical soil moisture probability distributions consistent with empirical distributions derived from satellite soil moisture observations. The global median Nash–Sutcliffe efficiency between empirical soil moisture distributions and theoretical distributions using reference constants, inferred median parameters per biome, and spatially variable inferred parameters are 0.38, 0.59, and 0.8, respectively. Spatially variable thresholds capture location-specific vegetation and climate characteristics and can be connected to biome-level water uptake strategies. Results demonstrate that satellite soil moisture probability distributions encode information, valuable to understanding biome-level ecohydrological adaptation and resistance to climate variability. ©2020. The Authors.
英文关键词	Agricultural robots; Bayesian networks; Inference engines; Satellites; Soil moisture; Stochastic systems; Vegetation; Climate characteristics; Climate variability; Empirical distributions; Empirical functions; Satellite soil moisture; Soil moisture distribution; Soil water potential; Variable thresholds; Probability distributions
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/170503
作者单位	Department of Biological and Ecological Engineering, Oregon State University, Corvallis, OR, United States; Department of Crop Production Ecology, Swedish University of Agricultural Sciences, Uppsala, Sweden; Department of Forest Ecosystems and Society, Oregon State University, Corvallis, OR, United States
推荐引用方式 GB/T 7714	Bassiouni M.,Good S.P.,Still C.J.,et al. Plant Water Uptake Thresholds Inferred From Satellite Soil Moisture[J],2020,47(7).
APA	Bassiouni M.,Good S.P.,Still C.J.,&Higgins C.W..(2020).Plant Water Uptake Thresholds Inferred From Satellite Soil Moisture.Geophysical Research Letters,47(7).
MLA	Bassiouni M.,et al."Plant Water Uptake Thresholds Inferred From Satellite Soil Moisture".Geophysical Research Letters 47.7(2020).