气候变化领域集成服务门户(CCPortal): Modulations of north american and european weather variability and extremes by interdecadal variability of the atmospheric circulation over the north atlantic sector

CCPortal

DOI	10.1175/JCLI-D-19-0977.1
	Modulations of north american and european weather variability and extremes by interdecadal variability of the atmospheric circulation over the north atlantic sector
	Martineau P.; Nakamura H.; Kosaka Y.; Taguchi B.; Mori M.
发表日期	2020
ISSN	0894-8755
起始页码	8125
结束页码	8146
卷号	33 期号:18
英文摘要	The dominant mode of wintertime interdecadal covariability between subseasonal surface air temperature (SAT) variability and midtropospheric circulation over the North Atlantic sector is identified through maximum covariance analysis applied to century-long reanalysis data. This mode highlights a tendency for subseasonal temperature variability over Europe and eastern North America to be enhanced during decades when the negative phase of the North Atlantic Oscillation (NAO) prevails. This interdecadal NAO is characterized by a stationary Rossby wave train that originates from the subtropical Atlantic, propagates northward into the subpolar Atlantic, and finally refracts toward Europe and the Middle East. A decadal increase in precipitation in the subtropics under the enhanced supply of heat and moisture from the Gulf Stream and its surroundings appears to act as a source for this wave train. The influence of the interdecadal NAO on subseasonal SAT variability is explained primarily by the modulated efficiency of baroclinic conversion of available potential energy from the background atmospheric flow to subseasonal eddies. The combination of enhanced subseasonal variability and low winter-mean temperature anomalies associated with the negative phase of the interdecadal NAO increases the frequency of cold extremes affecting Europe and the eastern United States. Ó 2020 American Meteorological Society.
英文关键词	Atmospheric pressure; Conversion efficiency; Mechanical waves; Meteorology; Ocean currents; Potential energy; Tropics; American meteorological societies; Atmospheric circulation; Inter-decadal variability; Maximum covariance analysis; North Atlantic oscillations; Subseasonal variability; Surface air temperatures; Temperature variability; Atmospheric movements; atmospheric circulation; decadal variation; extreme event; North Atlantic Oscillation; Rossby wave; seasonal variation; temperate environment; Atlantic Ocean; Europe; Gulf Stream
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/171127
作者单位	Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan
推荐引用方式 GB/T 7714	Martineau P.,Nakamura H.,Kosaka Y.,et al. Modulations of north american and european weather variability and extremes by interdecadal variability of the atmospheric circulation over the north atlantic sector[J],2020,33(18).
APA	Martineau P.,Nakamura H.,Kosaka Y.,Taguchi B.,&Mori M..(2020).Modulations of north american and european weather variability and extremes by interdecadal variability of the atmospheric circulation over the north atlantic sector.Journal of Climate,33(18).
MLA	Martineau P.,et al."Modulations of north american and european weather variability and extremes by interdecadal variability of the atmospheric circulation over the north atlantic sector".Journal of Climate 33.18(2020).