DOI: 10.1002/2016GL069569
论文题名: Classification of stratospheric extreme events according to their downward propagation to the troposphere
作者: Runde T. ; Dameris M. ; Garny H. ; Kinnison D.E.
刊名: Geophysical Research Letters
ISSN: 0094-9680
EISSN: 1944-9411
出版年: 2016
卷: 43, 期: 12 起始页码: 6665
结束页码: 6672
语种: 英语
英文关键词: Downward coupling
; Stratospheric dynamics
Scopus关键词: Climate models
; Chemistry-climate models
; Daily time series
; Extreme events
; Geopotential height anomalies
; Polar cap
; Stratospheric polar vortex
; Troposphere
英文摘要: This study presents a classification of stratospheric extreme events during northern winter into events with or without a consistent downward propagation of anomalies to the troposphere. Anomalous strong and weak stratospheric polar vortex events are detected from daily time series of the polar cap averaged (60°–90°N) geopotential height anomaly. The method is applied to chemistry-climate model data (E39CA and WACCM3.5) and reanalyses data (ERA40). The analyses show that in about 80% of all events no significant tropospheric response can be detected. The stratospheric perturbation of both weak and strong events with a significant tropospheric response persists significantly longer throughout the stratosphere compared to the events without a tropospheric response. The strength of the stratospheric perturbation determines the strength of the tropospheric response only to a small degree. Results are consistent across all three data sets. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84977561577&doi=10.1002%2f2016GL069569&partnerID=40&md5=ff44fc4d8cfa5b0bee50f17393612008
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10643
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Deutsches Zentrum für Luft- und Raumfahrt, Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany
Recommended Citation:
Runde T.,Dameris M.,Garny H.,et al. Classification of stratospheric extreme events according to their downward propagation to the troposphere[J]. Geophysical Research Letters,2016-01-01,43(12).