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    Salient Differences in Tropical Cyclone Activity over the Western North Pacific between 1998 and 2016

    Source: Journal of Climate:;2017:;volume( 030 ):;issue: 024::page 9979
    Author:
    Zhan, Ruifen;Wang, Yuqing;Liu, Qinyu
    DOI: 10.1175/JCLI-D-17-0263.1
    Publisher: American Meteorological Society
    Abstract: AbstractPrevious studies have suggested that tropical cyclone (TC) seasons over the western North Pacific (WNP) in the decaying years of El Niño events are generally less active than normal. The two strongest El Niño events on record were 1997/98 and 2015/16, but TC activities over the WNP displayed a sharp contrast between the decaying years of the two events. In 1998, consistent with previous studies, the WNP witnessed an extremely quiet season with no TC genesis in the preseason (January?June) and with only 10 named TCs observed in the typhoon season (July?October), making 1998 the most inactive season in the basin on record. In 2016, no TC formed in the preseason, similar to 1998; however, the basin became remarkably active in the typhoon season with above-normal named TCs observed. Further analyses indicate that the absence of TCs in the preseason in both 1998 and 2016 and the less active typhoon season in 1998 were attributed to the strong western Pacific anomalous anticyclone associated with the super El Niño events. However, the pattern of sea surface temperature anomalies (SSTAs) in the Pacific in 2016 showed features distinct from that in 1998. During July?August, the extremely positive phase of the Pacific meridional mode (PMM) triggered an anomalous cyclonic circulation and negative vertical wind shear over the WNP, favorable for TC geneses, while during September?October, the combined effect of the equatorial western Pacific warming and the weak La Niña event enhanced TC geneses over the WNP.
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      Salient Differences in Tropical Cyclone Activity over the Western North Pacific between 1998 and 2016

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    contributor authorZhan, Ruifen;Wang, Yuqing;Liu, Qinyu
    date accessioned2018-01-03T11:01:46Z
    date available2018-01-03T11:01:46Z
    date copyright9/7/2017 12:00:00 AM
    date issued2017
    identifier otherjcli-d-17-0263.1.pdf
    identifier urihttp://138.201.223.254:8080/yetl1/handle/yetl/4246259
    description abstractAbstractPrevious studies have suggested that tropical cyclone (TC) seasons over the western North Pacific (WNP) in the decaying years of El Niño events are generally less active than normal. The two strongest El Niño events on record were 1997/98 and 2015/16, but TC activities over the WNP displayed a sharp contrast between the decaying years of the two events. In 1998, consistent with previous studies, the WNP witnessed an extremely quiet season with no TC genesis in the preseason (January?June) and with only 10 named TCs observed in the typhoon season (July?October), making 1998 the most inactive season in the basin on record. In 2016, no TC formed in the preseason, similar to 1998; however, the basin became remarkably active in the typhoon season with above-normal named TCs observed. Further analyses indicate that the absence of TCs in the preseason in both 1998 and 2016 and the less active typhoon season in 1998 were attributed to the strong western Pacific anomalous anticyclone associated with the super El Niño events. However, the pattern of sea surface temperature anomalies (SSTAs) in the Pacific in 2016 showed features distinct from that in 1998. During July?August, the extremely positive phase of the Pacific meridional mode (PMM) triggered an anomalous cyclonic circulation and negative vertical wind shear over the WNP, favorable for TC geneses, while during September?October, the combined effect of the equatorial western Pacific warming and the weak La Niña event enhanced TC geneses over the WNP.
    publisherAmerican Meteorological Society
    titleSalient Differences in Tropical Cyclone Activity over the Western North Pacific between 1998 and 2016
    typeJournal Paper
    journal volume30
    journal issue24
    journal titleJournal of Climate
    identifier doi10.1175/JCLI-D-17-0263.1
    journal fristpage9979
    journal lastpage9997
    treeJournal of Climate:;2017:;volume( 030 ):;issue: 024
    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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