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The extraordinarily strong and cold polar vortex in the early northern winter 2015/16

Matthias, Vivien and Dörnbrack, Andreas and Stober, Gunter (2016) The extraordinarily strong and cold polar vortex in the early northern winter 2015/16. Geophysical Research Letters, 43 (23), pp. 12287-12294. Wiley. doi: 10.1002/2016GL071676. ISSN 0094-8276.

[img] PDF - Postprint version (accepted manuscript)

Official URL: http://dx.doi.org/10.1002/2016GL071676


The Arctic polar vortex in the early winter 2015/16 was the strongest and coldest o f the la st 68 years. Using global reanalysis data, satellite observations, and mesospheric radar wind measurements over northern Scandinavia we investigate the characteristics of the early sta g e polar vortex and relate them to previous winters. We found a correlation between the planetary wave (PW) activity and the strength and temperature of the northern polar vor- tex in the stratosphere and mesosphere. In Nov/D ec 2015, a reduced PW generation in the troposphere and a stronger PW filtering in the troposphere and stratosphere, caused by stronger zonal winds in mid-latitudes, resulted in a stronger polar vortex. Thi s effect was strengthened by the equator ward shift of PWs due to the strong zonal wind in polar latitudes resulting in a southward shift of the Eliassen-Palm flux divergence and hence inducinga decreased deceleration of th e polar vortex by PWs.

Item URL in elib:https://elib.dlr.de/108690/
Document Type:Article
Title:The extraordinarily strong and cold polar vortex in the early northern winter 2015/16
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Matthias, VivienLeibniz-Institute of Atmospheric Physics, KühlungsbornUNSPECIFIEDUNSPECIFIED
Stober, GunterLeibniz-Institute of Atmospheric Physics, KühlungsbornUNSPECIFIEDUNSPECIFIED
Date:December 2016
Journal or Publication Title:Geophysical Research Letters
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 12287-12294
Keywords:coldest and strongest Arctic polar vortex , stratospheric planetary wave activity
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:air traffic management and operations
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Climate, Weather and Environment (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Transport Meteorology
Deposited By: Ziegele, Brigitte
Deposited On:01 Dec 2016 13:58
Last Modified:26 May 2020 12:29

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