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    Large-Scale Flow and the Long-Lasting Blocking High over Russia: Summer 2010

    Source: Monthly Weather Review:;2012:;volume( 140 ):;issue: 009::page 2967
    Author:
    Schneidereit, Andrea
    ,
    Schubert, Silke
    ,
    Vargin, Pavel
    ,
    Lunkeit, Frank
    ,
    Zhu, Xiuhua
    ,
    Peters, Dieter H. W.
    ,
    Fraedrich, Klaus
    DOI: 10.1175/MWR-D-11-00249.1
    Publisher: 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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      Large-Scale Flow and the Long-Lasting Blocking High over Russia: Summer 2010

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4229777
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    contributor authorSchneidereit, Andrea
    contributor authorSchubert, Silke
    contributor authorVargin, Pavel
    contributor authorLunkeit, Frank
    contributor authorZhu, Xiuhua
    contributor authorPeters, Dieter H. W.
    contributor authorFraedrich, Klaus
    date accessioned2017-06-09T17:29:41Z
    date available2017-06-09T17:29:41Z
    date copyright2012/09/01
    date issued2012
    identifier issn0027-0644
    identifier otherams-86241.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4229777
    description abstracteveral 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.
    publisherAmerican Meteorological Society
    titleLarge-Scale Flow and the Long-Lasting Blocking High over Russia: Summer 2010
    typeJournal Paper
    journal volume140
    journal issue9
    journal titleMonthly Weather Review
    identifier doi10.1175/MWR-D-11-00249.1
    journal fristpage2967
    journal lastpage2981
    treeMonthly Weather Review:;2012:;volume( 140 ):;issue: 009
    contenttypeFulltext
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