Cite this paper:
QI Jifeng, YIN Baoshu, ZHANG Qilong, YANG Dezhou, XU Zhenhua. Seasonal variation of the Taiwan Warm Current Water and its underlying mechanism[J]. HaiyangYuHuZhao, 2017, 35(5): 1045-1060

Seasonal variation of the Taiwan Warm Current Water and its underlying mechanism

QI Jifeng1,2,3, YIN Baoshu1,2,3,4, ZHANG Qilong1,2, YANG Dezhou1,2,3, XU Zhenhua1,2,3
1 Institute of Oceanology, Chinese Academy of Science, Qingdao 266071, China;
2 Key Laboratory of Ocean Circulation and Waves, Chinese Academy of Science, Qingdao 266071, China;
3 Function Laboratory for Ocean Dynamics and Climate, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266000, China;
4 University of Chinese Academy of Science, Beijing 100049, China
Based on the historical observed data and the modeling results, this paper investigated the seasonal variations in the Taiwan Warm Current Water (TWCW) using a cluster analysis method and examined the contributions of the Kuroshio onshore intrusion and the Taiwan Strait Warm Current (TSWC) to the TWCW on seasonal time scales. The TWCW has obviously seasonal variation in its horizontal distribution, T-S characteristics and volume. The volume of TWCW is maximum (13 746 km3) in winter and minimum (11 397 km3) in autumn. As to the contributions to the TWCW, the TSWC is greatest in summer and smallest in winter, while the Kuroshio onshore intrusion northeast of Taiwan Island is strongest in winter and weakest in summer. By comparison, the Kuroshio onshore intrusion make greater contributions to the Taiwan Warm Current Surface Water (TWCSW) than the TSWC for most of the year, except for in the summertime (from June to August), while the Kuroshio Subsurface Water (KSSW) dominate the Taiwan Warm Current Deep Water (TWCDW). The analysis results demonstrate that the local monsoon winds is the dominant factor controlling the seasonal variation in the TWCW volume via Ekman dynamics, while the surface heat flux can play a secondary role via the joint effect of baroclinicity and relief.
Key words:    Western Pacific Warm Pool (WPWP)|sea surface temperature (SST)|El Niño-Southern Oscillation (ENSO)   
Received: 2016-01-18   Revised: 2016-03-24
PDF (1643 KB) Free
Print this page
Add to favorites
Email this article to others
Articles by QI Jifeng
Articles by YIN Baoshu
Articles by ZHANG Qilong
Articles by YANG Dezhou
Articles by XU Zhenhua
Bai X Z, Hu D X. 2004. A numerical study on seasonal variations of the Taiwan Warm Current. Chinese Journal of Oceanology and Limnology, 22(3):278-285.
Boyer T, Levitus S. 1994. Quality control and processing of historical oceanographic temperature, salinity, and oxygen data. NOAA Technical Report NESDIS 81. National Oceanographic Data Center, Washington D.C.
Chen C T A. 1996. The Kuroshio intermediate water is the major source of nutrients on the East China Sea continental shelf. Oceanologica Acta, 19(5):523-527.
Chen H W, Liu C T, Matsuno T, et al. 2016. Temporal variations of volume transport through the Taiwan Strait, as identified by three-year measurements. Continental Shelf Research, 114:41-53.
Chuang W S. 1986. A note on the driving mechanisms of current in the Taiwan Strait. Journal of Oceanography, 42(5):355-361.
Fang G H, Zhao B R, Zhu Y H. 1991. Water volume transport through the Taiwan Strait and the continental shelf of the East China Sea measured with current meters. Elsevier Oceanography Series, 54:345-358.
Guan B X, Mao H L. 1982. A note on circulation of the East China Sea. Chinese Journal of Oceanology and Limnology, 1(1):5-16.
Guo J S, Hu X M, Yuan Y L. 2005. A diagnostic analysis of variations in volume transport through the Taiwan Strait using satellite altimeter data. Advances in Marine Science, 23(1):20-26. (in Chinese with English abstract)
Guo X Y, Miyazawa Y, Yamagata T. 2006. The Kuroshio onshore intrusion along the shelf break of the East China Sea:the origin of the Tsushima warm current. Journal of Physical Oceanography, 36(12):2 205-2 231.
Hao J J, Chen Y L, Wang F, Lin P F. 2012. Seasonal thermocline in the China Seas and northwestern Pacific Ocean. Journal of Geophysical Research, 117(C2), 1029/2011JC007246.
Hu J Y, Kawamura H, Li C Y et al. 2010. Review on current and seawater volume transport through the Taiwan Strait.Journal of Oceanography, 66(5):591-610.
Hur H B, Jacobs G A, Teague W J. 1999. Monthly variations of water masses in the Yellow and East China Seas, November 6, 1998. Journal of Oceanography, 55(2):171-184.
Isobe A. 1999. On the origin of the Tsushima Warm Current and its seasonality. Continental Shelf Research, 19(1):117-133.
Isobe A. 2008. Recent advances in ocean-circulation research on the Yellow Sea and East China Sea shelves. Journal of Oceanography, 64(4):569-584.
Jan S, Wang J, Chern C S, Chao S Y. 2002. Seasonal variation of the circulation in the Taiwan Strait. Journal of Marine Systems, 35(3-4):249-268.
Johns W E, Lee T N, Zhang D X et al. 2001. The Kuroshio east of Taiwan:Moored transport observations from the WOCE PCM-1 array. Journal of Physical Oceanography, 31(4):1 031-1 053.
Kent E, Woodruff S, Rayner N et al. 2007. Advances in the use of historical marine climate data. Bulletin of the American Meteorological Society, 88(4):559-564.
Li F Q, Su Y S. 2000. Analyzing of Oceanic Water Masses.Ocean University of Qingdao Press, Qingdao. 344p. (in Chinese)
Liu S X, Han S X, Wei Y K. 1984. Analysis of water-masses of north-western Donghai Sea and their relations to fishing grounds. Journal of Fisheries of China, 8(2):125-133. (in Chinese with English abstract)
Mertz G, Wright G D. 1992. Interpretations of the JEBAR term. Journal of Physical Oceanography, 22(3):301-305.
Nitani H. 1972. Beginning of the Kuroshio. In:Stommel H, Yoshida K eds. Kuroshio-Its Physical Aspects. University of Tokyo Press, Tokyo. p.129-163.
Oey L Y, Hsin Y C, Wu C R. 2010. Why does the Kuroshio northeast of Taiwan shift shelfward in winter? Ocean Dyn., 60(2):413-426.
Qi J F, Yin B S, Zhang Q L, et al. 2014. Analysis of seasonal variation of water masses in East China Sea. Chinese Journal of Oceanology and Limnology, 32(4):958-971.
Qiu B, Imasato N. 1990. A numerical study on the formation of the Kuroshio Counter Current and the Kuroshio Branch Current in the East China Sea. Continental Shelf Research, 10(2):165-184.
Su J L, Pan Y C, Liang X S. 1994. Kuroshio intrusion and Taiwan warm current. In:Zhou D, Liang Y B, Tseng Z C K eds. Oceanology of China Seas, Part 1. Springer, Netherlands. p.59-70.
Takikawa T, Yoon J H, Cho K D. 2005. The Tsushima warm current through Tsushima Straits estimated from ferryboat ADCP data. Journal of Physical Oceanography, 35(6):1 154-1 168.
Wang F, Xu C, Dai L. 2004. International ocean database management system in the China and adjacent seas(IODBMS). Proceedings on Scientific Database and Informative Technology, 7:66-72. (in Chinese with English abstract)
Wang Y H, Jan S, Wang D P. 2003. Transports and tidal current estimates in the Taiwan Strait form shipboard ADCP observations (1999-2001). Estuarine, Coastal and Shelf Science, 57(1-2):193-199.
Weng X C, Wang C M. 1984. A preliminary study on the T-S characteristics and the origin of Taiwan Warm Current Water in summer. Studia Marina Sinica, 21:113-133. (in Chinese with English abstract)
Weng X C, Wang C M. 1985. An analysis of characteristics of variation of the Taiwan warm current deep water. Chinese Journal of Oceanology and Limnology, 3(1):96-108.
Wilks D S. 1995. Statistical Methods in the Atmospheric Sciences. Academic Press, San Diego.
Yang D Z, Yin B S, Liu Z L et al. 2011. Numerical study of the ocean circulation on the East China Sea shelf and a Kuroshio bottom branch northeast of Taiwan in summer.Journal of Geophysical Research, 116(C5),
Zhang Q L, Liu H W, Qin S S et al. 2014. The study on seasonal characteristics of water masses in the western East China Sea shelf area. Acta Oceanologica Sinica, 33(1):64-74.
Zhang Q L, Wang F, Zhao W H et al. 2007. Seasonal characteristics in the water masses in Zhoushan fishing ground and adjacent region. Acta Oceanologica Sinica, 29(5):1-9. (in Chinese with English abstract)
Zhang Q L, Weng X C. 1985. A preliminary investigation on dividing the water masses in the East China Sea in summer by using the comparison analysis method. Marine Sciences, 9(2):14-18. (in Chinese with English abstract)
Zhu X M, Liu G M, Wang J et al. 2015. A numerical study on the relationships of the variations of volume transport around the China seas. Journal of Marine Systems, 145:15-36.