WEI Yanzhou, PEI Yuhua, ZHANG Rong-Hua. Seasonal variability of the Kuroshio Current at the PN Section in the East China Sea based on in-situ observation from 1987 to 2010[J]. Acta Oceanologica Sinica, 2015, 34(5): 12-21. doi: 10.1007/s13131-015-0662-3
Citation: WEI Yanzhou, PEI Yuhua, ZHANG Rong-Hua. Seasonal variability of the Kuroshio Current at the PN Section in the East China Sea based on in-situ observation from 1987 to 2010[J]. Acta Oceanologica Sinica, 2015, 34(5): 12-21. doi: 10.1007/s13131-015-0662-3

Seasonal variability of the Kuroshio Current at the PN Section in the East China Sea based on in-situ observation from 1987 to 2010

doi: 10.1007/s13131-015-0662-3
  • Received Date: 2014-08-14
  • Rev Recd Date: 2014-11-20
  • As the spatio-temporal variability of the Kuroshio is highly influenced by mesoscale eddies, representing its seasonal variability characteristics requires sufficiently long term observations to reduce the uncertainties. Geostrophic velocity data estimated from hydrographic observation from 1987 to 2010 and the shipboard ADCP velocity data from 1993 to 2008 at the PN Section in the central East China Sea are collected to view the seasonal variability objectively. From both types of observation, it is found that the seasonal climatology mean of the Kuroshio Current exhibits significant difference in three areas, which are located at the Kuroshio Current core and its two flanks in a shallow layer less than 300 m, with the weakest northeast current at the core in autumn, the strongest counter current on the right flank in spring, and the strongest northeast current on the left flank in autumn, respectively. The seasonal variance of the Kuroshio Current also exhibits significant difference on the off-shore side of the Kuroshio, with larger variance in spring and summer while smaller variance in autumn and winter. For the current parallel to the PN Section, the ratio of the seasonal variability component to the intraseasonal variability component is relatively smaller than that for the current perpendicular to the PN Section. Further analyses indicate that the seasonal variability at the PN Section is tightly linked to the upstream and downstream current variability.
  • loading
  • Andres M, Kwon Y O, Yang Jiayan. 2011. Observations of the Kuroshio's barotropic and baroclinic responses to basin-wide wind forcing. J Geophys Res Oceans, 116(C4), doi: 10.1029/2010JC006863
    Andres M, Park J H, Wimbush M, et al. 2008. Study of the Kuroshio/Ryukyu Current system based on satellite-altimeter and in situ measurements. J Oceanogr, 64(6): 937-950
    Andres M, Park J H, Wimbush M, et al. 2009. Manifestation of the Pa-cific decadal oscillation in the Kuroshio. Geophysical Research Letters, 36(16), doi: 10.1029/2009GL039216
    Brown M B, Forsythe A B. 1974. Robust tests for the equality of vari-ances. Journal of the American Statistical Association, 69(346): 364-367
    Fujiwara I, Hanzawa Y, Eguchi I, et al. 1987. Seasonal oceanic condi-tions on a fixed line in the East China Sea. The Oceanographic-al Magazine, 37: 37-46
    Guan Bingxian. 1988. Major features and variability of the Kuroshio in the East China Sea. Chin J Oceanol Limnol, 6(1): 35-48
    Guo Xinyu, Miyazawa Y, Yamagata T. 2006. The Kuroshio onshore in-trusion along the shelf break of the East China Sea: the origin of the Tsushima Warm Current. J Phys Oceanogr, 36(12): 2205-2231
    Hinata T. 1996. Seasonal variation and long-term trends of the ocean-ographic conditions along a fixed hydrographic line crossing the Kuroshio in the East China Sea. The Oceanographical Magazine, 45: 9-32
    Hisaki Y, Imadu C. 2009. Southward recirculation of the East China Sea Kuroshio west of Okinawa Island. J Geophys Res, 114(C6): C06013, doi: 10.1029/2008JC004943
    Hu Xiaomin, Xiong Xuejun, Qiao Fangli, et al. 2008. Surface current field and seasonal variability in the Kuroshio and adjacent re-gions derived from satellite-tracked drifter data. Acta Oceano-logica Sinica, 27(3): 11-29
    Ichikawa H, Beardsley R C. 1993. Temporal and spatial variability of volume transport of the Kuroshio in the East China Sea. Deep-Sea Research Part I: Oceanographic Research Papers, 40(3): 583-605
    Isobe A. 2000. Two-layer model on the branching of the Kuroshio southwest of Kyushu, Japan. J Phys Oceanogr, 30(9): 2461-2476
    Kagimoto T, Yamagata T. 1997. Seasonal Transport Variations of the Kuroshio: An OGCM Simulation. J Phys Oceanogr, 27(3): 403-418
    Kawabe M. 1988. Variability of Kuroshio velocity assessed from the sea-level difference between Naze and Nishinoomote. Journal of the Oceanographical Society of Japan, 44(6): 293-304
    Lee T N, Johns W E, Liu C T, et al. 2001. Mean transport and seasonal cycle of the Kuroshio east of Taiwan with comparison to the Florida Current. J Geophys Res, 106(C10): 22143-22158
    Liu Yonggang, Yuan Yaochu. 1999. Variability of the Kuroshio in the East China Sea in 1993 and 1994. Acta Oceanologica Sinica, 18(1): 17-36
    Mantua N J, Hare S R, Zhang Yuan, et al. 1997. A Pacific interdecadal climate oscillation with impacts on salmon production. Bull Amer Meteor Soc, 78(6): 1069-1079
    Na H, Wimbush M, Park J H, et al. 2014. Observations of flow variabil-ity through the Kerama Gap between the East China Sea and the Northwestern Pacific. J Geophys Res Oceans, 119(2): 689-703
    Nitani H. 1972. Beginning of the Kuroshio. In: Stommel H, Yoshida K, eds. Kuroshio, Physical Aspects of the Japan Current. Seattle, US: University of Washington Press, 129-164
    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
    Oka E, Kawabe M. 1998. Characteristics of variations of water proper-ties and density structure around the Kuroshio in the East China Sea. J Oceanogr, 54(6): 605-617
    Soeyanto E, Guo Xinyu, Ono J, et al. 2014. Interannual variations of Kuroshio transport in the East China Sea and its relation to the Pacific Decadal Oscillation and mesoscale eddies. J Geophys Res Oceans, 119(6): 3595-3616
    Su Jilan, Guan Bingxian, Jiang Jingzhong. 1990. The Kuroshio, Part 1, Physical features. Oceanogr Mar Biol Annu Rev, 28: 11-71
    Tang T Y, Tai J H, Yang Y J. 2000. The flow pattern north of Taiwan and the migration of the Kuroshio. Cont Shelf Res, 20(4-5): 349-371
    Teague W J, Jacobs G A, Ko D S, et al. 2003. Connectivity of the Taiwan, Cheju, and Korea straits. Cont Shelf Res, 23(1): 63-77
    Wei Yanzhou, Huang Daji, Zhu Xiaohua. 2013. Interannual to decadal variability of the Kuroshio Current in the East China Sea from 1955 to 2010 as indicated by in-situ hydrographic data. J Oceanogr, 69(5): 571-589
    Yamashiro T, Maeda A, Sakurai M, et al. 1990. Mean velocity distribu-tion and transport of the Kuroshio referred to GEK surface velo-city in the East China Sea. Umi to Sora (Sea and Sky) (in Japan-ese), 66(3): 181-190
    Yuan Yaochu, Kaneko A, Su Jilan, et al. 1998. The Kuroshio east of Taiwan and in the East China Sea and the currents east of Ry-ukyu Islands during early summer of 1996. J Oceanogr, 54(3):217-226
    Yuan Yaochu, Liu Yonggang, Su Jilan. 2001. Variability of the Kurosh-io in the East China Sea during El-Nino to La-Ni.a Phenomen-on of 1997 and 1998. Chinese Journal of Geophysics, 44(2): 196-207
    Zhang Dongxiao, Lee T N, Johns W E, et al. 2001. The Kuroshio east of Taiwan: Modes of variability and relationship to interior ocean mesoscale eddies. J Phys Oceanogr, 31(4): 1054-1074
    Zhang Ronghua, Levitus S. 1997. Structure and cycle of decadal vari-ability of upper-ocean temperature in the North Pacific. Journ-al of Climate, 10(4): 710-727
    Zhu Xiaohua, Huang Daji, Guo Xinyu. 2010. Autumn intensification of the Ryukyu Current during 2003-2007. Science China Earth Sciences, 53(4): 603-609
  • 加载中


    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Article Metrics

    Article views (2902) PDF downloads(3202) Cited by()
    Proportional views


    DownLoad:  Full-Size Img  PowerPoint