利用2015年6月南海北部现场观测的水文数据,结合卫星高度计资料,分析了2015年6月13日—28日南海北部陆坡在气旋涡-反气旋涡的双涡结构影响下的水文和环流特征。结果表明,2015年6月南海北部陆坡调查海区表层50 m以浅盐度存在NE—SW向低盐区,表层盐度最小值低于32,这表明南海北部陆坡存在跨陆架海水输送。在观测期间,南海北部陆坡调查海区受气旋涡和反气旋涡双涡结构影响,使得南海北部陆坡表层100 m以浅存在跨陆坡流,流速最大值出现在两涡交汇区域。此外,通过潜标连续海流资料,发现南海北部陆坡环流呈现了“深入浅出”(100 m以深层为向岸的入侵、以浅层为离岸的出流)的“两层结构”。
Abstract
Using in situ hydrographic measurements during June 2015 and satellite altimeter data provided by archiving validation and interpretation of satellite oceanographic data(AVISO), the hydrographical features and circulation with influences of cyclonic-anticyclonic eddy-pair in the northern slope of the South China Sea during June 2015 were studied. The results showed that the low-salinity water in northeast-southwest direction was found in the upper 50 m in the northern slope of the South China Sea during June 2015. The minimum surface salinity values were below 32, which indicated the presence of cross-slope transport in the northern slope of the South China Sea. Due to the existence of cyclonic-anticyclonic eddy-pair in the northern slope of the South China Sea during the observation, the cross-slope currents were found in the upper 100 m,of which the maximum velocity was observed in the intersection of two eddies. In addition, the circulation across the continental slope in the Northern South China Sea derived from the moored current measurements, presented two-layer structure: offshore flow in the upper 100 m and onshore flow beneath 100 m.
关键词
南海北部 /
陆坡 /
环流 /
气旋涡-反气旋涡
Key words
Northern South China Sea /
continental slope /
circulation /
cyclonic-anticyclonic eddy-pair
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] LI Rui-xiang, CHEN Chang-sheng, XIA Hua-yong, et al. Observed wintertime tidal and subtidal currents over the continental shelf in the northern South China Sea[J]. Journal of Geophysical Research: Oceans,2014,119(8):5 289-5 310.
[2] WYRTKI K. Physical oceanography of the southeast Asian waters[M]. La Jolla, CA: Scripps Institution of Oceanography,1961.
[3] SU Ji-lan. Overview of the South China Sea circulation and its dynamics[J].Acta Oceanologica Sinica,2005,27(6):1-8.
苏纪兰.南海环流动力机制研究综述[J].海洋学报,2005,27(6):1-8.
[4] GUAN Bin-xian.The warm current in the South China Sea-A current flowing against the wind in winter in the open sea off Guangdong Province[J]. Oceanologia et Limnologia Sinica,1978,9(2):117-127.
管秉贤.南海暖流——广东外海一支逆风流动的海流[J].海洋与湖沼,1978,9(2):117-127.
[5] HSUEH Y, ZHONG L. A pressure-driven South China Sea Warm Current[J].Journal of Geophysical Research Atmospheres,2004,109(C9):143-168.
[6] YANG Jia-yan,WU De-xing, LIN Xiao-pei. On the dynamics of the South China Sea Warm Current[J].Journal of Geophysical Research,2008,113(C8):185-198.
[7] XU Xi-zhen,QIU Zhang,CHEN Hui-chang. General description of the horizontal circulation in the South China Sea[C].Beijing: Hydrology and Meteorology of the Chinese Society of Oceanology and Limnology,1982.
徐锡祯,邱章,陈惠昌.南海水平环流的概述[C].北京:中国海洋湖沼学会水文气象,1982.
[8] LIU Yong-gang, YUAN Yao-chu, SU Ji-lan, et al. South China sea circulation in summer, 1998[J]. Chinese Science Bulletin,2000,45(12):1 252-1 259.
刘勇刚,袁耀初,苏纪兰,等.1998年夏季南海环流[J].科学通报:中文版,2000,45(12):1 252-1 259.
[9] SU Ji-lan. A review of circulation dynamics of the coastal oceans near China[J]. Acta Oceanologica Sinica,2001,23(4):1-16.
苏纪兰.中国近海的环流动力机制研究[J].海洋学报,2001,23(4):1-16.
[10] WANG Gui-hua, SU Ji-lan, CHU P C. Mesoscale eddies in the South China Sea observed with altimeter data[J]. Geophysical Research Letters,2003,30(21):2 121.
[11] YUAN D, HAN W, HU D. Anti-cyclonic eddies northwest of Luzon in summer-fall observed by satellite altimeters[J]. Geophysical Research Letters,2007,34(13):256-260.
[12] WANG D, XU H, LIN J, et al. Anticyclonic eddies in the northeastern South China Sea during winter 2003/2004[J]. Journal of Oceanography,2008,64(6):925-935.
[13] LIU Chang-jian, ZHUANG Wei, XIA Hua-yong, et al. Mesoscale observation in the northeast South China Sea during winter 2009-2010[J].Acta Oceanologica Sinica,2012,34(1):8-16.
刘长建,庄伟,夏华永,等.2009-2010年冬季南海东北部中尺度过程观测[J].海洋学报,2012,34(1):8-16.
[14] HE Qi, WEI Ze-xun, WANG Yong-gang. Study on the sea currents in the northern shelf and slope of the South China Sea based on the observation[J].Acta Oceanologica Sinica,2012,34(1):17-28.
何琦,魏泽勋,王永刚.南海北部陆架陆坡区海流观测研究[J].海洋学报,2012,34(1):17-28.
[15] POULAIN P M, GERIN R, MAURI E, et al. Wind effects on drogued and undrogued drifters in the eastern Mediterranean[J]. Journal of Atmospheric and Oceanic Technology,2009,26(6):1 144-1 156.
[16] WANG Hui-nan, XU Dong-feng, CHEN Zhong-wei, et al. Exploration on the transportation capacity of meso-scale eddy using an anticyclonic eddy of the South China Sea in January 2010[J].Journal of Marine Sciences,2014,32(4):1-10.
王惠楠,许东峰,陈钟为,等.从2010年1月的1个反气旋涡探讨南海中尺度涡的输运能力[J].海洋学研究,2014,32(4):1-10.
[17] STEWART R H. Introduction to physical oceanography[M]. Texas: Texas A & M University,2004:162-188.
[18] DING Y, CHEN C, BEARDSLEY R C, et al. Observational and model studies of the circulation in the Gulf of Tonkin, South China Sea[J]. Journal of Geophysical Research: Oceans,2013,118(12):6 495-6 510.
[19] LIU Ke-feng, JIANG Guo-rong, CHEN Yi-di, et al. Analysis of upper-ocean surface currents of the South China Sea derived from satellite-tracked drifter data[J].Journal of Tropical Oceanography,2014,33(5):13-21.
刘科峰,蒋国荣,陈奕德,等.基于卫星漂流浮标的南海表层海流观测分析[J].热带海洋学报,2014,33(5):13-21.
基金
国家重点基础研究发展计划(“973”计划)项目资助(2014CB441501);国家自然科学基金项目资助(41406021);国家重点研发计划重点专项项目资助(2016YFC0304105);卫星海洋环境动力学国家重点实验室自主课题资助(SOEDZZ1505)
PDF(4248 KB)
