Impact of the South China Sea throughflow on the pacific low-latitude western boundary current: A numerical study for seasonal and interannual time scales
Impact of the South China Sea throughflow on the pacific low-latitude western boundary current: A numerical study for seasonal and interannual time scales
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DOI：
10.1007/s00376-011-0142-4
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发表时间：
2011-10
影响因子：
5.8
通讯作者：
Weiwen Wang;Dongxiao Wang;Wen Zhou;Qinyan Liu;Yongqiang Yu;Chao Li
中科院分区：
文献类型：
--
作者：
Weiwen Wang;Dongxiao Wang;Wen Zhou;Qinyan Liu;Yongqiang Yu;Chao Li
前人的研究表明，作为太平洋热带环流的一部分，南中国海贯通流受到太平洋低纬西边界流的强烈影响。本文利用海洋环流模式试验研究了与中国南海有联系和无联系的南海对太平洋LLWBC的影响。这些模式试验表明，如果南海被阻断，黑潮和棉兰老岛流的季节变化变得更强，北赤道流(NEC)分叉纬度的经向迁移增强。在季节和年际时间尺度上，较强的吕宋海峡输送(LST)导致较强的黑潮输送和NEC分叉的南移，不利于LST的进一步升高；较弱的LST导致较弱的黑潮输送和NEC分叉的北移，也不利于LST的持续降低。
Prior studies have revealed that, as a part of the Pacific tropical gyre, the South China Sea throughflow (SCSTF) is strongly influenced by the Pacific low-latitude western boundary current (LLWBC). In this study, ocean general circulation model (OGCM) experiments with and without connection to the South China Sea (SCS) were performed to investigate the impact of the SCSTF on the Pacific LLWBC. These model experiments show that if the SCS is blocked, seasonal variability of the Kuroshio and Mindanao Current becomes stronger, and the meridional migration of the North Equatorial Current (NEC) bifurcation latitude is enhanced. Both in seasonal and interannual time scales, stronger Luzon Strait transport (LST) induces a stronger Kuroshio transport combined with a southward shift of the NEC bifurcation, which is unfavorable for a further increase of the LST; a weaker LST induces a weaker Kuroshio transport and a northward shifting NEC bifurcation, which is also unfavorable for the continuous decrease of the LST.