理想台风驱动的涡旋对吕宋海峡黑潮影响的数值研究*

doi:10.11978/j.issn.1009-5470.2013.02.007

Abstract

Abstract:

There are many westward-propagating eddies in the subtropical regions in the North Pacific Ocean; therefore, it is worth studying whether these eddies can travel across the Kuroshio and through the Luzon Strait (LS). In this paper, a numerical model is employed to simulate the Kuroshio in the vicinity of the LS and the eddies east of the LS. Our results show that none of these eddies can propagate through the LS and enter the South China Sea (SCS). On this basis, an idealized typhoon is added to the model. Strong cyclonic and anticyclonic eddies can be generated by the positive and negative typhoon wind stress curl, respectively. Each eddy so generated is located near the source region of the Kuroshio in August when the volumetric transport of the Kuroshio is minimal. Previous studies indicated that these eddies are more likely to penetrate through the LS when the Kuroshio transport is low; however, it remains unclear which factor plays the dominating role in pushing eddies through the LS. Our study indicates that, although the Kuroshio is the weakest in August, all eddies generated through the wind stress forcing, either cyclonic or anticyclonic, are blocked by the Kuroshio and cannot penetrate through the LS to enter the SCS.

Key words: Kuroshio, numerical simulation, ideal typhoon, mesoscale eddy

CLC Number:

P731

GENG Wu，HE Wei-hong，ZOU Xiao-li，XIE Qiang. A numerical study of effects due to mesoscale eddy induced by an idealized typhoon and the Kuroshio in the Luzon Strait[J].Journal of Tropical Oceanography, 2013, 32(2): 66-73.

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A numerical study of effects due to mesoscale eddy induced by an idealized typhoon and the Kuroshio in the Luzon Strait

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