气候变化领域集成服务门户(CCPortal): Atmospheric river changes shaped mid-latitude hydroclimate since the mid-Holocene

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DOI	10.1016/j.epsl.2020.116293
	Atmospheric river changes shaped mid-latitude hydroclimate since the mid-Holocene
	Skinner C.B.; Lora J.M.; Payne A.E.; Poulsen C.J.
发表日期	2020
ISSN	0012821X
卷号	541
英文摘要	Paleoclimate proxies indicate that changes in insolation since the mid-Holocene have driven widespread hydrologic changes across the midlatitudes. It is unclear how atmospheric rivers (ARs), which are fundamental to global moisture transport today, may have contributed to these Holocene hydroclimate changes. Here, we use a set of climate model simulations with the Community Earth System Model (CESM), and introduce an AR algorithm optimized to identify ARs within different climate states, to show that changes to the location and intensity of landfalling ARs explain the majority of the precipitation difference between the mid-Holocene and the preindustrial period in several midlatitude regions. During the mid-Holocene, enhanced seasonality increased summer season AR vapor content and displaced ARs poleward of their preindustrial period trajectories, especially in the Northern Hemisphere. Consequently, in high midlatitude coastal areas of western North America and East Asia, ARs account for greater than 10% more of total precipitation during the mid-Holocene, and nearly 100% of the simulated change in precipitation between the two climates. The simulated AR changes are consistent with moisture-sensitive proxy records and with present-day relationships between ARs and regional circulation, enhancing confidence that ARs served as the underlying synoptic mechanism responsible for mid-Holocene hydroclimate anomalies in several coastal mid-latitude areas. The results indicate that ARs are sensitive to background climate state, and suggest that changes in ARs may have contributed to hydroclimate changes throughout Earth's past. © 2020 The Author(s)
关键词	atmospheric river climate change Holocene climate precipitation
英文关键词	Atmospheric movements; Climate models; Moisture; Climate model simulations; Earth system model; Hydrologic changes; Moisture transport; Northern Hemispheres; Paleoclimate proxy; Regional circulation; Total precipitation; Climate change; algorithm; atmospheric moisture; climate modeling; Holocene; hydrological change; midlatitude environment; moisture transfer; Northern Hemisphere; paleoclimate; precipitation (climatology); seasonality; summer; Far East; North America
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202892
作者单位	Department of Environmental, Earth and Atmospheric Sciences, University of Massachusetts Lowell, Lowell, MA, United States; Department of Geology and Geophysics, Yale University, New Haven, CT, United States; Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI, United States; Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI, United States
推荐引用方式 GB/T 7714	Skinner C.B.,Lora J.M.,Payne A.E.,et al. Atmospheric river changes shaped mid-latitude hydroclimate since the mid-Holocene[J],2020,541.
APA	Skinner C.B.,Lora J.M.,Payne A.E.,&Poulsen C.J..(2020).Atmospheric river changes shaped mid-latitude hydroclimate since the mid-Holocene.Earth and Planetary Science Letters,541.
MLA	Skinner C.B.,et al."Atmospheric river changes shaped mid-latitude hydroclimate since the mid-Holocene".Earth and Planetary Science Letters 541(2020).