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INTERANNUAL VARIABILITY OF THE KUROSHIO CURRENT INTRUSION IN THE SOUTH CHINA SEA
Caruso,Michael J; Beardsley,Robert C; Gawarkiewicz,Glen G;
Gayana (Concepción) , 2004, DOI: 10.4067/S0717-65382004000200017
Abstract: the interannual variability of the kuroshio current intrusion into the south china sea is investigated using a combination of satellite remote sensing data and in situ measurements. this research was conducted as part of the asian seas international acoustic experiment (asiaex). the circulation of the south china sea has been studied for years and is predominantly wind-forced by the northeast winter and southwest summer monsoons. there remains some uncertainty to the interannual nature of the circulation and the effect of kuroshio intrusions on mesoscale features in the northeast south china sea. satellite observations of sea surface temperature (sst) from the tropical rainfall measuring mission (trmm) and sea surface height anomalies (ssha) from topex/poseidon are used to analyze the interannual variability in the intrusion and the effect on the region. analysis of sst and ssha shows the formation of a kuroshio intrusion varies considerably each winter. since the circulation in the south china sea is primarily wind-driven, ocean surface wind vectors from the nasa quikscat satellite scatterometer are used to evaluate the relationship between wind stress or wind stress curl and the intensity of the winter kuroshio intrusion into the south china sea
INTERANNUAL VARIABILITY OF THE KUROSHIO CURRENT INTRUSION IN THE SOUTH CHINA SEA  [cached]
Michael J Caruso,Robert C Beardsley,Glen G Gawarkiewicz
Gayana (Concepción) , 2004,
Abstract: The interannual variability of the Kuroshio Current intrusion into the South China Sea is investigated using a combination of satellite remote sensing data and in situ measurements. This research was conducted as part of the Asian Seas International Acoustic EXperiment (ASIAEX). The circulation of the South China Sea has been studied for years and is predominantly wind-forced by the northeast winter and southwest summer monsoons. There remains some uncertainty to the interannual nature of the circulation and the effect of Kuroshio intrusions on mesoscale features in the northeast South China Sea. Satellite observations of Sea Surface Temperature (SST) from the Tropical Rainfall Measuring Mission (TRMM) and Sea Surface Height Anomalies (SSHA) from TOPEX/Poseidon are used to analyze the interannual variability in the intrusion and the effect on the region. Analysis of SST and SSHA shows the formation of a Kuroshio Intrusion varies considerably each winter. Since the circulation in the South China Sea is primarily wind-driven, ocean surface wind vectors from the NASA QuikSCAT satellite scatterometer are used to evaluate the relationship between wind stress or wind stress curl and the intensity of the winter Kuroshio Intrusion into the South China Sea
Spatial variations in the Kuroshio nutrient transport from the East China Sea to south of Japan  [PDF]
X. Y. Guo,X.-H. Zhu,Y. Long,D. J. Huang
Biogeosciences Discussions , 2013, DOI: 10.5194/bgd-10-6737-2013
Abstract: Based on absolute geostrophic velocity calculated from repeated hydrographic data of 39 cruises from 2000 to 2009 and nitrate concentrations measured at the same sections from 1964 to 2011, we obtained temporally averaged nitrate flux (the product of velocity and nitrate concentration) and nitrate transport (integration of flux over a section) through 4 sections along the Kuroshio path from the East China Sea (sections PN and TK) to south of Japan (sections ASUKA and 137E). In addition, we examined section OK east of the Ryukyu Islands in order to understand the contribution of Ryukyu Current to the Kuroshio nutrient transport south of Japan. The mean nitrate flux shows a subsurface maximum core with a value of 10, 10, 11, 11, and 6 mol m–2 s–1 at sections PN, TK, ASUKA, 137E, and OK, respectively. The depth of subsurface maximum core changes among five sections and is approximately 400, 500, 500, 400, and 800 m at sections PN, TK, ASUKA, 137E, and OK respectively. The mean downstream nitrate transport is 199.3, 176.3, 909.2, 1385.5, and 341.2 kmol m–1 at sections PN, TK, ASUKA, 137E, and OK respectively. The nutrient transports at these sections suggest the presence of Kuroshio nutrient stream from its upstream region to downstream. The deep current structure of Ryukyu Current (section OK) makes it contribute more nitrate transport than the Kuroshio in the East China Sea (section TK) to the Kuroshio south of Japan. In addition, the positive difference between the downstream nitrate transport through section ASUKA and the sum of nitrate transports through sections TK and OK, as well as the positive difference of downstream nitrate transport between sections 137E and ASUKA, suggest that the Kuroshio recirculation significantly intensifies the downstream (eastward) nitrate transport by the Kuroshio.
Influence of the Kuroshio on the water properties in the shelf  [PDF]
T. Matsuno,J.-S. Lee,S. Yanao
Ocean Science Discussions (OSD) , 2009,
Abstract: The Kuroshio flows along the edges of the marginal East Asian seas such as the South China Sea (SCS) and East China Sea (ECS). Exchanges of materials and energy between the Kuroshio and the marginal seas partly control the environments of the marginal seas. In particular, saline water from the Kuroshio maintains certain salinity in the shelf water in the ECS. Nutrients from the subsurface of the Kuroshio may influence primary production on the shelf. We summarize how the Kuroshio comes into contact with the shelf water or marginal seas, describing phenomena related to the exchange between the Kuroshio and the ECS along with the SCS, using reports in the literature along with original data. The Kuroshio tends to intrude into the SCS as a loop current around the Luzon Strait. The Kuroshio intrusion into the shelf region of the ECS has distinct seasonal variation and the Taiwan Warm Current plays a significant role in the determination of water properties in the outer shelf associated with the Kuroshio intrusion. We then examine physical processes related to the interaction between the Kuroshio and shelf water. Interaction between the Kuroshio and the bottom topography is an important process in the control of the exchange around the shelf break. Vertical mixing and frontal eddies are also important factors that control the water exchange and formation of water masses in the outer shelf. Wind stress plays a significant role in the exchange with a rather event-like manner. To determine the source of the water masses, chemical tracers could be powerful tools and it is suggested that a significant part of the shelf water consists of Kuroshio intermediate water.
The Kuroshio exchange with the South and East China Seas  [PDF]
T. Matsuno,J.-S. Lee,S. Yanao
Ocean Science (OS) & Discussions (OSD) , 2009,
Abstract: The Kuroshio flows along the edges of the marginal East Asian seas such as the South China Sea (SCS) and East China Sea (ECS). Exchanges of materials and energy between the Kuroshio and the marginal seas partly control the environments of the marginal seas. In particular, saline water from the Kuroshio maintains certain salinity in the shelf water in the ECS. Nutrients from the subsurface of the Kuroshio may influence primary production on the shelf. We summarize how the Kuroshio comes into contact with the shelf water or marginal seas, describing phenomena related to the exchange between the Kuroshio and the ECS along with the SCS, using reports in the literature along with original data. The Kuroshio tends to intrude into the SCS through the Luzon Strait in various manners such as direct intrusion, associated with eddies and as a loop current. The Kuroshio intrusion into the shelf region of the ECS has distinct seasonal variation and the Taiwan Warm Current plays a significant role in the determination of water properties in the outer shelf associated with the Kuroshio intrusion. We then examine physical processes related to the interaction between the Kuroshio and shelf water. Interaction between the Kuroshio and the bottom topography is an important process in the control of the exchange around the shelf break. Vertical mixing and frontal eddies are also important factors that control the water exchange and formation of water masses in the outer shelf. Wind stress plays a significant role in the exchange with a rather event-like manner. To determine the source of the water masses, chemical tracers could be powerful tools and it is suggested that a significant part of the shelf water consists of Kuroshio intermediate water.
Monthly Spatial Variation of Nutrients and Nutrient Limitation in Kuroshio of East China Sea
东海黑潮区营养盐及其限制作用的月际空间分异

LIU Chao,KANG Jiancheng,WANG Guodong,ZHU Wenwu,SUN Wenzheng,Li Yan,
刘超
,康建成,王国栋,朱文武,孙闻政,李燕

资源科学 , 2012,
Abstract: The change of nutrient level and nutrient proportion in ocean impacts the marine primary productivity and is related to sustainable development of marine ecosystem and marine fishery. The Kuroshio region in East China Sea has rich fishery resources, so the research on nutrients in this area is of great significance to the sustainable development of China’s marine fishery. This paper has analyzed the monthly change of nutrient content, nutrient proportion and nutrient limitation in Kuroshio East China Sea with the Nutrients World Ocean Atlas 2009 issued by NOAA in 2010. The results show that: 1)Nutrients concentration increases from surface to the deep, and the change of concentration has different characteristics in areas up 250m and areas below 250m. The average concentration of DIN is the same with that of P. In areas up 250m, the maximum concentration appears in May and June and the minimum concentration appears in July and August. In areas below 250m, the maximum concentration appears from October to December and the minimum concentration appears from July to October. However, the average concentration of Si is different from that of DIN and P. In areas up 250m, the maximum concentration of Si appears from May to July and the minimum concentration appears in November and December. In areas below 250m, the maximum concentration of Si appears from April to May and the minimum concentration appears in September; 2) N/P, Si/N and Si/P in shallow waters of 250m have significant spatial differences. The spatial differences of N/P and Si/N are most obvious from August to September and from March to April while the smaller differences occur from October to December. The spatial distribution of Si/P is different from that of N/P and Si/N, with strong regional differences appearing in September and the relatively uniform spatial distribution appearing from May to June; 3)The shallow waters of 300m in the studied sea area are limited by nutrient concentration of N and P. From April to November, the nutrient conditions within the range of 100~200m of waters in northeastern Taiwan, the central area of Kuroshio and the southwest of Kyushu island are suitable for the growth of Phytoplankton, so these areas will be the potential fishery resource development regions.
Kuroshio Inferred from SSTs  [PDF]
Kern E. Kenyon
Natural Science (NS) , 2018, DOI: 10.4236/ns.2018.1011041
Abstract: Twenty years of ship-injection temperatures are averaged annually and plotted against longitude in the western tropics of the North Pacific. Centered at 150E at both 20N and 25N is a large-scale longitudinal maximum in sea surface temperature. The simplest in-terpretation of this permanent feature is that a continuous flow of warm surface water out of the south is required to maintain it, since some heat will escape into the atmosphere in transit. It is concluded that the northward flow is the Kuroshio.
Impacts of Typhoons on Kuroshio Large Meander: Observation Evidences
SUN Liang,YANG Yuan-Jian,FU Yun-Fei,
SUN Liang
,YANG Yuan-Jian,FU Yun-Fei

大气和海洋科学快报 , 2009,
Abstract: The formation of the Kuroshio large meander in summer 2004 was investigated by using the cruise data, Argo profiles data, and satellite remote sensing data. We validated the point that cyclonic eddy contributes to the large meander. Besides, the impacts of typhoons on Kuroshio meanders were studied. From 29 July to 4 August, the typhoons stirred the ocean and upwelled the deep water, which enhanced the existed cyclonic eddy, and immediately made a drastic meander of the Kuroshio. Moreover, the unexpected typhoons in June 2004 also contributed to the initial meander at Tokara Strait. The result clearly shows an alternative meander mechanism of Kuroshio path via typhoon-eddy-Kuroshio interactions. It is argued that typhoons accompanied with cyclonic eddies, might play crucial roles in meanders of the Kuroshio. This will provide a more comprehensive understanding of the dynamics of the west boundary flows like the Kuroshio and the Gulf Stream, and will be useful in eddy-resolution models.
Impacts of Typhoons on the Kuroshio Large Meander: Observation Evidences  [PDF]
Liang Sun,Yuan-Jian Yang,Yun-Fei Fu
Physics , 2008,
Abstract: The formation of the Kuroshio large meander in summer 2004 was investigated by using the cruise data, Argo profiles data, and satellite remote sensing data. We validated the point that cyclonic eddy contributes to the large meander. Besides, the impacts of typhoons on Kuroshio meanders were studied. From 29 July to 4 August, the typhoons stirred the ocean and upwelled the deep water, which enhanced the existed cyclonic eddy, and immediately made a drastic meander of the Kuroshio. Moreover, the unexpected typhoons in June 2004 also contributed to the initial meander at Tokara Strait. The result suggests an alternative meander mechanism of Kuroshio path via typhoon-eddy-Kuroshio interactions. It is argued that typhoons accompanied with cyclonic eddies, might play crucial roles in meanders of the Kuroshio. This will provide a more comprehensive understanding of the dynamics of the west boundary flows like the Kuroshio and the Gulf Stream, and will be useful in eddy-resolution models.
Seasonal and Mesoscale Variability of the Kuroshio Near Its Origin  [PDF]
Daniel L. Rudnick,Sen Jan,Luca Centurioni,Craig M. Lee
Oceanography , 2011,
Abstract: The Kuroshio is the most important current in the North Pacific. Here, we present historical data and recent observations of the Kuroshio off the coasts of Taiwan and the Philippine Archipelago, with a focus on its origins. Seasonal climatologies from shipboard hydrographic and velocity measurements, and from surface drifters, demonstrate changes in the Kuroshio caused by the monsoon. In particular, seasonal monsoon forcing affects the degree of penetration of the Kuroshio through Luzon Strait. Data from surface drifters and underwater gliders describe its mesoscale variability. Velocities derived from drifters make clear the mesoscale variability associated with the Subtropical Countercurrent east of the Kuroshio. Underwater gliders document mesoscale structure prominent in salinity extrema associated with water masses. The evolution of these water masses as they progress northward near the Kuroshio indicates strong mixing in the region.
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