Temporal and spatial variation characteristics on eddies in the South China Sea Ⅰ. Statistical analyses

LIN Peng-fei; WANG Fan; CHEN Yong-li; TANG Xiao-hui

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LIN Peng-fei, WANG Fan, CHEN Yong-li, TANG Xiao-hui. Temporal and spatial variation characteristics on eddies in the South China Sea Ⅰ. Statistical analyses[J]. Haiyang Xuebao, 2007, 29(3): 14-22.

Citation:

LIN Peng-fei, WANG Fan, CHEN Yong-li, TANG Xiao-hui. Temporal and spatial variation characteristics on eddies in the South China Sea Ⅰ. Statistical analyses[J]. Haiyang Xuebao, 2007, 29(3): 14-22.

LIN Peng-fei, WANG Fan, CHEN Yong-li, TANG Xiao-hui. Temporal and spatial variation characteristics on eddies in the South China Sea Ⅰ. Statistical analyses[J]. Haiyang Xuebao, 2007, 29(3): 14-22.

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Temporal and spatial variation characteristics on eddies in the South China Sea Ⅰ. Statistical analyses

1.
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;The Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
2.
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
3.
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;The Graduate School of the Chinese Academy of Sciences, Beijing 100039, China

Received Date: 2006-06-12
Rev Recd Date: 2007-02-15

Abstract

Abstract

Mesoscale eddies were identified and traced in the South China Sea (SCS) from 1993 to 2001 using TOPEX/Poseidon merged ERS-1/2 altimeter data through several criteria.Their space-time variation characteristics were statistically analyzed.Averagely,there were about 18 eddies emerge annually in this region.The amount of eddies emerge annually may be related with ElNiño/La Niña.Generally,eddy life-times were less than 180 days and mainly ranged from 30 to 60 days.Eddy radiiranged from 100 km to 250 km and followed up with the baroclinic Rossby deformation radii.About 80% eddies moved westward.Eddy zonal moving speeds ranged from -8 cm/s to 3 cm/s and changed meridionally like a "E" style.Eddies were active along a band from east of Southern Vietnam to Southwest of Taiwan in the northeast-southwest direction.Statistically calculated on 2°×2°grids,areas of relatively large eddy occurrence probabilities (OPs) were found located to the west of the Luzon Strait and to the east of Southern Vietnam with probabilities of about 23% and 25%,respectively.In the area with depth > 200 m in the SCS,the mean contribution of eddies to the sea level undulation was 36%.The maximum contribution could reach as high as 80% where the rms of SLA was very high,like the relative large eddy occurrence probabilities to the west of the Luzon Strait and to the east of Southern Vietnam.From the places where eddies emerged,propagation paths and speeds,occurrence probabilities and the contributions to the sea level undulation,eddies in the SCS could be separated into two relatively independent systems bounded by 17°N,where eddies could not propagate across.
- mesoscale eddies,
- sea level anomaly,
- occurrence probability,
- contribution

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References(21)

References

DALE W L.Winds and drift currents in the South China Sea[J].Malayan J Trop Geogr,1956,(8):1-31.

NITANI H.Oceanographic conditions in the sea east of Philippines and Luzon Strait Summer of 1965 and 1966[A].MARR J D.The Kuroshio——A Syposium on Japan Current[C].Honolulu,Hawaii:East-West Press,1970.213-232.

UDA M,NAKAO T.Water masses and currents in the South China Sea and their changes[A].Paper presented at the 3rd Cooperative Study of the Kuroshio and Adjacent Regions(CSK) Symposium[M].UNESCO,Bangkok:Thailand,1972.

徐锡祯.南海中部的温、盐、密度分布及其水团分析特征[A].中国科学院南海所.南海海区综合调查研究报告(一)[R].北京:科学出版社,1982.119-126.

中国科学院南海海洋研究所.南海海区综合调查研究报告(二)[M].北京:科学出版社,1985.183-231.

黄企州.南沙群岛海区的海流[A].中国南沙综合科学考察队.南沙群岛海区物理海洋学研究论文集Ⅰ[C].北京:海洋出版社,1994.10-27.

SOONG Y S,HU J H,HO C R,et al.Cold core eddy detected in South China Sea[J].EOS,1995,76(35),345-347.

方文东,郭忠信,黄羽庭.南海南部海区的环流观测研究[J].科学通报,1997,42(21):2 265-2 271.

LI L,NOWLIN W D,SU J L.Anticyclonic rings from the Kuroshio in the South China Sea[J].Deep-Sea Res Ⅰ,1998,(45):1 469-1 482.

CHU P C,FAN C,LOZANO C,et al.An airborne XBT survey of the South China Sea,May 1995[J].J Geophys Res,1998,(103):2 163-21 652.

王东晓,陈举,陈荣裕,等.2000年8月南海中部与南部海洋温盐与环流特征[J].海洋与湖沼,2004,15(2):97-108.

HUANG C AND CHEN S A.Circulation and eddies over the South China Sea derived from TOPEX/Poseidon Altimetry[J].J Geophys Res,2000,105(C10):23 943-23 965.

WANG G H,SU J L,CHU Peter C.Mesoscale eddies in the South China Sea observed with altimetry[J].Geophysical Research Letter,2003,30(21):212I 10.1029/2003GL018532.

DUCET N,LE Traon P Y,REVERDIN G.Global high-resolution mapping of ocean circulation from TOPEX/Poseidon and ERS-1 and -2[J].J Geophys Res,2000,C8 (105):19 477-19 498.

SCHLAX M G,CHELTON D B.Aliased tidal errors in TOPEX/POSEIDON sea surface height data[J].J Geophys Res,1994,(99):24 761-24 775.

SU J L,XU J P,CAI S Q,et al.Gyres and eddies in the South China Sea[A].DINGY,LIC.Onset and Evolution of the South China Sea Monsoon and its Interaction with the Ocean[M].Beijing:China Meteorological Press,1999.272-279.

王凡,赵永平,冯志刚,等.1998年春夏南海温盐结构及其变化特征[J].海洋学报,2001,23(5):1-13.

MÜLLER P,FRANKIGNOUL C.Direct atmospheric forcing of geostrophic eddies[J].J Phys Oceanogr,1981,(11):287-308.

WANG L,KOBLINSKY C,HOWDEN S.Mesoscale variability in the South China Sea from the TOPEX/Poseidon altimetry data[J].Deep-Sea Res Ⅰ,2000,47:681-708.

HU Jian-yu,KAWAMURA Hiroshi,HONG Hua-sheng,et al.3-6 months variation of sea surface height in the South China Sea and its adjacent ocean[J].Journal of Oceanography,2001,57:69-78.

STAMMER D.Global characteristics of ocean variability from regional TOPEX/POSEIDON altimeter measurements[J].J Phys Oceanogr,1997,(27):1 743-1 769.

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