Large-Scale Flow and the Long-Lasting Blocking High over Russia: Summer 2010Source: Monthly Weather Review:;2012:;volume( 140 ):;issue: 009::page 2967Author:Schneidereit, Andrea
,
Schubert, Silke
,
Vargin, Pavel
,
Lunkeit, Frank
,
Zhu, Xiuhua
,
Peters, Dieter H. W.
,
Fraedrich, Klaus
DOI: 10.1175/MWR-D-11-00249.1Publisher: American Meteorological Society
Abstract: everal studies show that the anomalous long-lasting Russian heat wave during the summer of 2010, linked to a long-persistent blocking high, appears mainly as a result of natural atmospheric variability. This study analyzes the large-scale flow structure based on the ECMWF Re-Analysis Interim (ERA-Interim) data (1989?2010). The anomalous long-lasting blocking high over western Russia including the heat wave occurs as an overlay of a set of anticyclonic contributions on different time scales. (i) A regime change in ENSO toward La Niña modulates the quasi-stationary wave structure in the boreal summer hemisphere supporting the eastern European blocking. The polar Arctic dipole mode is enhanced and shows a projection on the mean blocking high. (ii) Together with the quasi-stationary wave anomaly, the transient eddies maintain the long-lasting blocking. (iii) Three different pathways of wave action are identified on the intermediate time scale (~10?60 days). One pathway commences over the eastern North Pacific and includes the polar Arctic region; another one runs more southward and crossing the North Atlantic, continues to eastern Europe; a third pathway southeast of the blocking high describes the downstream development over South Asia.
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contributor author | Schneidereit, Andrea | |
contributor author | Schubert, Silke | |
contributor author | Vargin, Pavel | |
contributor author | Lunkeit, Frank | |
contributor author | Zhu, Xiuhua | |
contributor author | Peters, Dieter H. W. | |
contributor author | Fraedrich, Klaus | |
date accessioned | 2017-06-09T17:29:41Z | |
date available | 2017-06-09T17:29:41Z | |
date copyright | 2012/09/01 | |
date issued | 2012 | |
identifier issn | 0027-0644 | |
identifier other | ams-86241.pdf | |
identifier uri | http://onlinelibrary.yabesh.ir/handle/yetl/4229777 | |
description abstract | everal studies show that the anomalous long-lasting Russian heat wave during the summer of 2010, linked to a long-persistent blocking high, appears mainly as a result of natural atmospheric variability. This study analyzes the large-scale flow structure based on the ECMWF Re-Analysis Interim (ERA-Interim) data (1989?2010). The anomalous long-lasting blocking high over western Russia including the heat wave occurs as an overlay of a set of anticyclonic contributions on different time scales. (i) A regime change in ENSO toward La Niña modulates the quasi-stationary wave structure in the boreal summer hemisphere supporting the eastern European blocking. The polar Arctic dipole mode is enhanced and shows a projection on the mean blocking high. (ii) Together with the quasi-stationary wave anomaly, the transient eddies maintain the long-lasting blocking. (iii) Three different pathways of wave action are identified on the intermediate time scale (~10?60 days). One pathway commences over the eastern North Pacific and includes the polar Arctic region; another one runs more southward and crossing the North Atlantic, continues to eastern Europe; a third pathway southeast of the blocking high describes the downstream development over South Asia. | |
publisher | American Meteorological Society | |
title | Large-Scale Flow and the Long-Lasting Blocking High over Russia: Summer 2010 | |
type | Journal Paper | |
journal volume | 140 | |
journal issue | 9 | |
journal title | Monthly Weather Review | |
identifier doi | 10.1175/MWR-D-11-00249.1 | |
journal fristpage | 2967 | |
journal lastpage | 2981 | |
tree | Monthly Weather Review:;2012:;volume( 140 ):;issue: 009 | |
contenttype | Fulltext |