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    A Model Study on the 1988–89 Warming Event in the Northern North Pacific

    Source: Journal of Physical Oceanography:;2003:;Volume( 033 ):;issue: 008::page 1815
    Author:
    Luo, Jing-Jia
    ,
    Yamagata, Toshio
    DOI: 10.1175/2413.1
    Publisher: American Meteorological Society
    Abstract: Using outputs of a high-resolution ocean general circulation model, upper-ocean heat content budget and mixed layer heat budget are analyzed to investigate the reason for the 1988?89 decadal warming event in the northern North Pacific. The model reproduces realistic upper-ocean temperature changes in comparison with observational data. This analysis suggests that the horizontal mean geostrophic advection of anomalous temperature is the main contributor to the heat content increase around 1988?89, and surface heat flux forcing is the main contributor to increasing mixed layer temperature. The anomalous geostrophic advection of mean temperature plays a negative role in the increase of both the upper-ocean heat content and mixed layer temperature in midlatitudes around 1988?89. Another negative contribution to the mixed layer temperature increase is provided by the Ekman advection. In the Kuroshio Extension region, the warm upper-ocean heat content anomaly appears in 1987?88, in which the mean geostrophic advection also plays a dominant role. South of Japan the decadal warming appears even earlier, around 1985?86. The anomalous Kuroshio transport shows a decadal decreasing trend since the early 1980s and therefore cannot explain the late 1980s warming event in midlatitudes. The 1988?89 event is found to be closely linked with the decadal change of the Kuroshio path south of Japan. It is found that subtropical Rossby waves may influence the decadal temperature changes south of Japan.
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      A Model Study on the 1988–89 Warming Event in the Northern North Pacific

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4214325
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    contributor authorLuo, Jing-Jia
    contributor authorYamagata, Toshio
    date accessioned2017-06-09T16:41:35Z
    date available2017-06-09T16:41:35Z
    date copyright2003/08/01
    date issued2003
    identifier issn0022-3670
    identifier otherams-72333.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4214325
    description abstractUsing outputs of a high-resolution ocean general circulation model, upper-ocean heat content budget and mixed layer heat budget are analyzed to investigate the reason for the 1988?89 decadal warming event in the northern North Pacific. The model reproduces realistic upper-ocean temperature changes in comparison with observational data. This analysis suggests that the horizontal mean geostrophic advection of anomalous temperature is the main contributor to the heat content increase around 1988?89, and surface heat flux forcing is the main contributor to increasing mixed layer temperature. The anomalous geostrophic advection of mean temperature plays a negative role in the increase of both the upper-ocean heat content and mixed layer temperature in midlatitudes around 1988?89. Another negative contribution to the mixed layer temperature increase is provided by the Ekman advection. In the Kuroshio Extension region, the warm upper-ocean heat content anomaly appears in 1987?88, in which the mean geostrophic advection also plays a dominant role. South of Japan the decadal warming appears even earlier, around 1985?86. The anomalous Kuroshio transport shows a decadal decreasing trend since the early 1980s and therefore cannot explain the late 1980s warming event in midlatitudes. The 1988?89 event is found to be closely linked with the decadal change of the Kuroshio path south of Japan. It is found that subtropical Rossby waves may influence the decadal temperature changes south of Japan.
    publisherAmerican Meteorological Society
    titleA Model Study on the 1988–89 Warming Event in the Northern North Pacific
    typeJournal Paper
    journal volume33
    journal issue8
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/2413.1
    journal fristpage1815
    journal lastpage1828
    treeJournal of Physical Oceanography:;2003:;Volume( 033 ):;issue: 008
    contenttypeFulltext
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