气候变化领域集成服务门户(CCPortal): Land transpiration-evaporation partitioning errors responsible for modeled summertime warm bias in the central United States

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DOI	10.1038/s41467-021-27938-6
	Land transpiration-evaporation partitioning errors responsible for modeled summertime warm bias in the central United States
	Dong J.; Lei F.; Crow W.T.
发表日期	2022
ISSN	2041-1723
卷号	13 期号:1
英文摘要	Earth system models (ESMs) from the Coupled Model Intercomparison Project Phase 6 (CMIP6) experiment exhibit a well-known summertime warm bias in mid-latitude land regions – most notably in the central contiguous United States (CUS). The dominant source of this bias is still under debate. Using validated datasets and both coupled and off-line modeling, we find that the CUS summertime warm bias is driven by the incorrect partitioning of evapotranspiration (ET) into its canopy transpiration and soil evaporation components. Specifically, CMIP6 ESMs do not effectively use available rootzone soil moisture for summertime transpiration and instead rely excessively on shallow soil and canopy-intercepted water storage to supply ET. As such, expected summertime precipitation deficits in CUS induce a negative ET bias into CMIP6 ESMs and a corresponding positive temperature bias via local land-atmosphere coupling. This tendency potentially biases CMIP6 projections of regional water stress and summertime air temperature variability under elevated CO2 conditions. © 2022, The Author(s).
语种	英语
scopus关键词	air temperature; carbon dioxide; CMIP; evaporation; evapotranspiration; shallow soil; soil moisture; water storage; water stress; United States
来源期刊	Nature Communications
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/250531
作者单位	USDA ARS Hydrology and Remote Sensing Laboratory, Beltsville, MD, United States; Institute of Surface-Earth System Science, Tianjin University, Tianjin, China; Geosystems Research Institute, Mississippi State University, Starkville, MS, United States; Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, United States
推荐引用方式 GB/T 7714	Dong J.,Lei F.,Crow W.T.. Land transpiration-evaporation partitioning errors responsible for modeled summertime warm bias in the central United States[J],2022,13(1).
APA	Dong J.,Lei F.,&Crow W.T..(2022).Land transpiration-evaporation partitioning errors responsible for modeled summertime warm bias in the central United States.Nature Communications,13(1).
MLA	Dong J.,et al."Land transpiration-evaporation partitioning errors responsible for modeled summertime warm bias in the central United States".Nature Communications 13.1(2022).