气候变化领域集成服务门户(CCPortal): Mechanisms of winter precipitation variability in the european-mediterranean region associated with the north atlantic oscillation

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DOI	10.1175/JCLI-D-20-0011.1
	Mechanisms of winter precipitation variability in the european-mediterranean region associated with the north atlantic oscillation
	Seager R.; Haibo L.I.U.; Kushnir Y.; Osborn T.J.; Simpson I.R.; Kelley C.R.; Nakamura J.
发表日期	2020
ISSN	0894-8755
起始页码	7179
结束页码	7196
卷号	33 期号:16
英文摘要	The physical mechanisms whereby the mean and transient circulation anomalies associated with the North Atlantic Oscillation (NAO) drive winter mean precipitation anomalies across the North Atlantic Ocean, Europe, and the Mediterranean Sea region are investigated using the European Centre for Medium-Range Weather Forecasts interim reanalysis. A moisture budget decomposition is used to identify the contribution of the anomalies in evaporation, the mean flow, storm tracks and the role of moisture convergence and advection. Over the eastern North Atlantic, Europe, and the Mediterranean, precipitation anomalies are primarily driven by the mean flow anomalies with, for a positive NAO, anomalous moist advection causing enhanced precipitation in the northern British Isles and Scandinavia and anomalous mean flow moisture divergence causing drying over continental Europe and the Mediterranean region. Transient eddy moisture fluxes work primarily to oppose the anomalies in precipitation minus evaporation generated by the mean flow, but shifts in storm-track location and intensity help to explain regional details of the precipitation anomaly pattern. The extreme seasonal precipitation anomalies that occurred during the two winters with the most positive (1988/89) and negative (2009/10) NAO indices are also explained by NAO-associated mean flow moisture convergence anomalies. © 2020 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	Advection; Atmospheric pressure; Budget control; Evaporation; Moisture; Oceanography; Precipitation (meteorology); Storms; Circulation anomalies; European centre for medium-range weather forecasts; Mediterranean region; Moisture convergence; North Atlantic oscillations; Precipitation anomalies; Seasonal precipitations; Winter precipitation; Weather forecasting; advection; air-sea interaction; eddy; evaporation; flow field; Mediterranean environment; moisture flux; North Atlantic Oscillation; precipitation assessment; storm track; weather forecasting; winter; Atlantic Ocean; Atlantic Ocean (North); Mediterranean Sea
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171183
作者单位	Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States; Climatic Research Unit, School of Environmental Sciences, University of East Anglia, Norwich, United Kingdom; National Center for Atmospheric Research, Boulder, CO, United States; International Research Institute for Climate and Society, Columbia University, Palisades, NY, United States
推荐引用方式 GB/T 7714	Seager R.,Haibo L.I.U.,Kushnir Y.,et al. Mechanisms of winter precipitation variability in the european-mediterranean region associated with the north atlantic oscillation[J],2020,33(16).
APA	Seager R..,Haibo L.I.U..,Kushnir Y..,Osborn T.J..,Simpson I.R..,...&Nakamura J..(2020).Mechanisms of winter precipitation variability in the european-mediterranean region associated with the north atlantic oscillation.Journal of Climate,33(16).
MLA	Seager R.,et al."Mechanisms of winter precipitation variability in the european-mediterranean region associated with the north atlantic oscillation".Journal of Climate 33.16(2020).