气候变化领域集成服务门户(CCPortal): Assessing California Wintertime Precipitation Responses to Various Climate Drivers

CCPortal

DOI	10.1029/2019JD031736
	Assessing California Wintertime Precipitation Responses to Various Climate Drivers
	Allen R.J.; Lamarque J.-F.; Watson-Parris D.; Olivié D.
发表日期	2020
ISSN	2169897X
卷号	125 期号:12
英文摘要	Understanding how drivers of climate change affect precipitation remains an important area of research. Although several robust precipitation responses have been identified under continued increases in greenhouse gases (GHGs), considerable uncertainty remains. This is particularly the case at regional scales, including the West Coast of the United States and California. Here, we exploit idealized, single forcing simulations from the Precipitation Driver Response Model Intercomparison Project (PDRMIP) to address how climate drivers impact California wintertime precipitation. Consistent with recent work, GHGs including carbon dioxide and methane, as well as solar forcing, yield a robust increase in California wintertime precipitation. We also find robust California precipitation responses to aerosols but with opposite responses for sulfate versus black carbon aerosol. Sulfate aerosol increases California wintertime precipitation, whereas black carbon reduces it. Moreover, California precipitation is more sensitive to aerosols, particularly regional emissions from Europe and Asia, than to GHGs. These precipitation responses are consistent with shifts in the jet stream and altered moisture fluxes. Although the idealized nature of PDRMIP simulations precludes a formal attribution, our results suggest that aerosols can perturb precipitation and fresh water resources along the West Coast of the United States. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	aerosols; black carbon; California; greenhouse gases; Precipitation; sulfate
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185962
作者单位	Department of Earth and Planetary Sciences, University of California Riverside, Riverside, CA, United States; NCAR/UCAR, BoulderCO, United States; Atmospheric, Oceanic & Planetary Physics, Department of Physics, University of Oxford, Oxford, United Kingdom; Norwegian Meteorological Institute, Oslo, Norway
推荐引用方式 GB/T 7714	Allen R.J.,Lamarque J.-F.,Watson-Parris D.,et al. Assessing California Wintertime Precipitation Responses to Various Climate Drivers[J],2020,125(12).
APA	Allen R.J.,Lamarque J.-F.,Watson-Parris D.,&Olivié D..(2020).Assessing California Wintertime Precipitation Responses to Various Climate Drivers.Journal of Geophysical Research: Atmospheres,125(12).
MLA	Allen R.J.,et al."Assessing California Wintertime Precipitation Responses to Various Climate Drivers".Journal of Geophysical Research: Atmospheres 125.12(2020).