气候变化领域集成服务门户(CCPortal): Climate State Dependence of Arctic Precipitation Variability

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DOI	10.1029/2019JD031772
	Climate State Dependence of Arctic Precipitation Variability
	Bogerd L.; van der Linden E.C.; Krikken F.; Bintanja R.
发表日期	2020
ISSN	2169897X
卷号	125 期号:8
英文摘要	Arctic precipitation is projected to increase more rapidly than the global mean in warming climates. However, warming-induced changes in the variability of Arctic precipitation, which are related to surface evaporation and poleward moisture transport (PMT), are currently largely unknown. This study compares the precipitation variability in different quasi-equilibrium climates simulated by a global climate model (EC-Earth) and studies the underlying mechanisms. Five quasi-equilibrium simulations of 400 years length forced with a broad range of CO2 concentrations (0.25, 0.5, 1, 2, and 4 times the current global mean) were analyzed. PMT is the dominant source of Arctic precipitation variability in colder climates when the ocean in the Arctic basin is completely covered by sea ice year-round. Arctic precipitation variability increases from colder to warmer climates, primarily in summer. In summer, the increasingly stronger relation between Arctic sea level pressure variability and precipitation variability toward warmer climates enhances variability. In winter, the severe increase in mean precipitation (due to enhanced evaporation) exerts a comparatively small increase in variability, and precipitation variability is modulated by both PMT and evaporation, which oppose each other as they both affect the vertical and meridional moisture gradients. ©2020. The Authors.
英文关键词	Arctic; climate variability; hydrological cycle; precipitation
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/186050
作者单位	Royal Netherlands Meteorological Institute, De Bilt, Netherlands; Institute for Marine and Atmospheric research Utrecht, Utrecht, Netherlands; Water Systems and Global Change Group, Wageningen University and Research, Wageningen, Netherlands; Energy and Sustainability Research Institute Groningen (ESRIG), University of Groningen, Groningen, Netherlands
推荐引用方式 GB/T 7714	Bogerd L.,van der Linden E.C.,Krikken F.,et al. Climate State Dependence of Arctic Precipitation Variability[J],2020,125(8).
APA	Bogerd L.,van der Linden E.C.,Krikken F.,&Bintanja R..(2020).Climate State Dependence of Arctic Precipitation Variability.Journal of Geophysical Research: Atmospheres,125(8).
MLA	Bogerd L.,et al."Climate State Dependence of Arctic Precipitation Variability".Journal of Geophysical Research: Atmospheres 125.8(2020).