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    How Does the East Asian Summer Monsoon Behave in the Decaying Phase of El Niño during Different PDO Phases?

    Source: Journal of Climate:;2014:;volume( 027 ):;issue: 007::page 2682
    Author:
    Feng, Juan
    ,
    Wang, Lin
    ,
    Chen, Wen
    DOI: 10.1175/JCLI-D-13-00015.1
    Publisher: American Meteorological Society
    Abstract: odulation of the Pacific decadal oscillation (PDO) on the behavior of the East Asian summer monsoon (EASM) in El Niño decaying years has been studied. When El Niño is in phase with the PDO (El Niño/high PDO), the low-level atmospheric anomalies are characterized by an anticyclone around the Philippines and a cyclone around Japan, inducing an anomalous tripolar rainfall pattern in China. In this case, the western Pacific subtropical high (WPSH) experiences a one-time slightly northward shift in July and then stays stationary from July to August. The corresponding anomalous tripolar rainfall pattern has weak subseasonal variations. When El Niño is out of phase with the PDO (El Niño/low PDO), however, the anomalous Philippines anticyclone has a much larger spatial domain, thereby causing an anomalous dipole rainfall pattern. Accordingly, WPSH experiences clearly two northward shifts. Therefore, the related dipole rainfall pattern has large subseasonal variations. One pronounced feature is that the positive rainfall anomalies shift northward from southern China in June to central China in July and finally to northern China in August.The different El Niño?EASM relationships are caused by the influences of PDO on the decaying speed of El Niño. During the high PDO phase, El Niño decays slowly and has a strong anchor in the north Indian Ocean warming, which is responsible for the anomalous EASM. Comparatively, during the low PDO phase, El Niño decays rapidly and La Niña develops in summer, which induces different EASM anomalies from that during the high PDO phase. Additionally, PDO changes El Niño behaviors mainly via modifying the background tropical winds.
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      How Does the East Asian Summer Monsoon Behave in the Decaying Phase of El Niño during Different PDO Phases?

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4222752
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    contributor authorFeng, Juan
    contributor authorWang, Lin
    contributor authorChen, Wen
    date accessioned2017-06-09T17:08:08Z
    date available2017-06-09T17:08:08Z
    date copyright2014/04/01
    date issued2014
    identifier issn0894-8755
    identifier otherams-79919.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4222752
    description abstractodulation of the Pacific decadal oscillation (PDO) on the behavior of the East Asian summer monsoon (EASM) in El Niño decaying years has been studied. When El Niño is in phase with the PDO (El Niño/high PDO), the low-level atmospheric anomalies are characterized by an anticyclone around the Philippines and a cyclone around Japan, inducing an anomalous tripolar rainfall pattern in China. In this case, the western Pacific subtropical high (WPSH) experiences a one-time slightly northward shift in July and then stays stationary from July to August. The corresponding anomalous tripolar rainfall pattern has weak subseasonal variations. When El Niño is out of phase with the PDO (El Niño/low PDO), however, the anomalous Philippines anticyclone has a much larger spatial domain, thereby causing an anomalous dipole rainfall pattern. Accordingly, WPSH experiences clearly two northward shifts. Therefore, the related dipole rainfall pattern has large subseasonal variations. One pronounced feature is that the positive rainfall anomalies shift northward from southern China in June to central China in July and finally to northern China in August.The different El Niño?EASM relationships are caused by the influences of PDO on the decaying speed of El Niño. During the high PDO phase, El Niño decays slowly and has a strong anchor in the north Indian Ocean warming, which is responsible for the anomalous EASM. Comparatively, during the low PDO phase, El Niño decays rapidly and La Niña develops in summer, which induces different EASM anomalies from that during the high PDO phase. Additionally, PDO changes El Niño behaviors mainly via modifying the background tropical winds.
    publisherAmerican Meteorological Society
    titleHow Does the East Asian Summer Monsoon Behave in the Decaying Phase of El Niño during Different PDO Phases?
    typeJournal Paper
    journal volume27
    journal issue7
    journal titleJournal of Climate
    identifier doi10.1175/JCLI-D-13-00015.1
    journal fristpage2682
    journal lastpage2698
    treeJournal of Climate:;2014:;volume( 027 ):;issue: 007
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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