Response of Kuroshio upwelling to the onset of the northeast monsoon in the sea north of Taiwan: Observations and a numerical simulation

Abstract

A cold water anomaly, which manifests upwelling of the subsurface Kuroshio Water, has been frequently observed at the shelf break of the East China Sea to the north of Taiwan. Its response to the onset of northeast monsoon was observed during August-October 1990. The wind direction reversed in mid-September, indicating the onset of northeast monsoon. Shortly thereafter, the sea surface temperature at the center of the cold eddy showed a pulselike sudden drop, and a significant concentration of nitrate (up to 5 /•M) appeared in the surface water, suggesting intensification of upwelling. Subsequently, the upper layer of the Kuroshio Water intruded onto the shelf. The general circulation model of the East China Sea previously developed by Chao was used to simulate the overall response of the East China Sea. The numerical simulation reproduced the intensification of upwelling. It also predicted extensive Kuroshio intrusion along the shelf break farther north of Taiwan as well as the temporary intensification of the northeast branch of the Yangtze River outflow. The energy source of this sudden intensification comes from the potential energy released by the Kuroshio as the isopycnals maintaining the Kuroshio rise in response to the wind change.

Influence of monsoon-driven hydrographic features on thaliacean distribution in waters around Taiwan, western North Pacific Ocean

“…Compared to waters west of Taiwan, the hydrographic situation in waters east of Taiwan was much simpler and was dominated by the warm and highly saline KC year-round. These hydrographic conditions in waters surrounding Taiwan are consistent with previous studies on the KC and East China Sea (ECS) (Wang and Chern 1988;Chern et al 1990;Liu et al 1992) and on the TS (Jan et al 2002(Jan et al , 2006. In the present study, we also noted that lower temperatures and higher salinities in the western TS, especially in waters southwest of the Penghu Islands, indicated the formation of topographic upwelling due to the Yunchang Rise (YR) (Figure 2).…”

Temperature versus substrate limitation of heterotrophic bacterioplankton production across trophic and temperature gradients in the East China Sea

“…Data were collected from bers. Two of these serve as important sources of inor-2 cruises conducted on the continental shelf of the ganic nutrients into the shelf area (Liu et al 1992 and southern ECS north of Taiwan ( Fig. 1) during the citations therein).…”

Effect of El Niño/Na Niña on Mesozooplankton Biomass in the Northwestern Subtropical Pacific Warm Pool and the Northern East China Sea

“…특히 여름철에는 중국대륙으로부터 장 강 유출수가 동중국해 북부해역에서 장강희석수를 형성하 여 주변해역의 생산성과 성층구조에 영향을 준다 (Su and Weng 1994;Lie et al 2003;Park et al 2011). 또한 동중국해 동쪽으로 쿠로시오 저층수가 대륙붕 으로 올라오는 용승작용에 의하여 물질교환이 상당히 이 루어지기도 한다 (Liu et al 1992;Chen and Wang 1999 (Marinovic et al 2002;Rebstock 2003;Fernández-Álamo and Färber-Lorda 2006;Hooff and Peterson 2006;Mackas et al 2006;Kang and Ohman 2014 …”