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    Annual and Interannual Variability of the Tropical Instability Vortices in the Equatorial Eastern Pacific Observed from Lagrangian Surface Drifters

    Source: Journal of Climate:;2016:;volume( 029 ):;issue: 024::page 9163
    Author:
    Zheng, Shaojun
    ,
    Feng, Ming
    ,
    Du, Yan
    ,
    Cheng, Xuhua
    ,
    Li, Jiaxun
    DOI: 10.1175/JCLI-D-16-0124.1
    Publisher: American Meteorological Society
    Abstract: his study documents the spatial distributions and temporal variations of anticyclonic eddies with identified radii ≥100 km in the equatorial eastern tropical Pacific Ocean [viz., tropical instability vortices (TIVs)] using Lagrangian surface drifters. The TIVs identified from Lagrangian surface drifters are distributed in a band along 5°N and are closely associated with latitudinal barotropically unstable shear between the westward South Equatorial Current (SEC) and the eastward North Equatorial Countercurrent (NECC). Fewer TIVs are identified from February to June when the shear between the SEC and NECC is weak, whereas more TIVs are found from July to January when the shear is enhanced. The number of identified TIVs also exhibits substantial interannual variability, with fewer TIVs identified during El Niño events and more TIVs found during La Niña events. This relationship is likely associated with the interannual variations of the zonal circulation in the equatorial Pacific modulated by El Niño?Southern Oscillation (ENSO).
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      Annual and Interannual Variability of the Tropical Instability Vortices in the Equatorial Eastern Pacific Observed from Lagrangian Surface Drifters

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4224270
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    contributor authorZheng, Shaojun
    contributor authorFeng, Ming
    contributor authorDu, Yan
    contributor authorCheng, Xuhua
    contributor authorLi, Jiaxun
    date accessioned2017-06-09T17:13:14Z
    date available2017-06-09T17:13:14Z
    date copyright2016/12/01
    date issued2016
    identifier issn0894-8755
    identifier otherams-81284.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4224270
    description abstracthis study documents the spatial distributions and temporal variations of anticyclonic eddies with identified radii ≥100 km in the equatorial eastern tropical Pacific Ocean [viz., tropical instability vortices (TIVs)] using Lagrangian surface drifters. The TIVs identified from Lagrangian surface drifters are distributed in a band along 5°N and are closely associated with latitudinal barotropically unstable shear between the westward South Equatorial Current (SEC) and the eastward North Equatorial Countercurrent (NECC). Fewer TIVs are identified from February to June when the shear between the SEC and NECC is weak, whereas more TIVs are found from July to January when the shear is enhanced. The number of identified TIVs also exhibits substantial interannual variability, with fewer TIVs identified during El Niño events and more TIVs found during La Niña events. This relationship is likely associated with the interannual variations of the zonal circulation in the equatorial Pacific modulated by El Niño?Southern Oscillation (ENSO).
    publisherAmerican Meteorological Society
    titleAnnual and Interannual Variability of the Tropical Instability Vortices in the Equatorial Eastern Pacific Observed from Lagrangian Surface Drifters
    typeJournal Paper
    journal volume29
    journal issue24
    journal titleJournal of Climate
    identifier doi10.1175/JCLI-D-16-0124.1
    journal fristpage9163
    journal lastpage9177
    treeJournal of Climate:;2016:;volume( 029 ):;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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