南海海面高度季节变化规律及机制探讨The Seasonal Variation of Sea Surface Height in the South China Sea:Characteristics and Mechanisms
曹越男,左军成,杜凌,李培良,李磊
摘要(Abstract):
利用POP模式对南海海面高度(SSH)、环流的季节变化进行了数值模拟,并将模拟得到的海面高度和比容高度(SSL)分别与TOPEX/Poseidon(T/P)高度和Ishii(2005)温盐资料算得的比容高度进行比较。结果表明,本文较好的模拟了南海海面高度和比容高度的季节变化。海面高度和比容高度在冬季和夏季、春季和秋季的空间变化形态相反。动力高度(DSL)与模拟得到的环流结构对应。冬季,吕宋冷涡和越南南部沿岸流转向形成的逆时针环流对应两个低值中心,南海西岸由于Ekman输运海水向岸堆积使西岸动力高度达到全年最高值;夏季,越南沿岸流转向形成的顺时针环流对应高值中心,东岸动力高度相对较高,西岸动力高度达到全年最低值。在南海周边海区动力高度对总的海面高度的贡献非常大,特别是越南、广东沿岸和泰国湾,约为80%~90%。在深水海区,尤其是主要的高值中心和低值中心,动力高度的贡献虽仍比比容高度的贡献大,而其对总的海面变化的贡献却只有50%~60%,这几乎与比容高度的贡献的40%~50%相当。
关键词(KeyWords): 南海;海平面;比容高度;动力高度;贡献
基金项目(Foundation): 国家自然科学基金项目(40676015/D0601,40376005);; 博士学科点专项科研基金项目(20060423014);; 教育部新世纪优秀人才支持计划项目(NCET-04-0646);; 908-02-01-04专题:气候变化和海平面上升及对沿海地区社会经济发展的影响项目资助
作者(Author): 曹越男,左军成,杜凌,李培良,李磊
DOI: 10.16441/j.cnki.hdxb.2007.s2.005
参考文献(References):
- Wang Dongxiao,Hong Bo,Gan Jianping.Numerical investigation on propulsion of the counter-wind current in the northern South China Seain winter[J].Deep-Sea Research PartⅠ(accepted).
- [1]Antonov J I,Levitus S,Boyer T P.Thermosteric sea level rise,1955-2003[J].Geophys Res Lett,2005,32,L12602,doi:10.1029/2005GL023112.
- [2]刘秦玉,杨海军,贾英来,等.南海海面高度季节变化的数值模拟[J].海洋学报,2001,23(2):9-17.
- [3]Liu Zhengyu,Yang Haijun,Liu Qinyu.Regional Dynamics of Sea-sonal Variabilityin the South China Sea[J].Journal of Physical O-ceanography,2001,31:272-284.
- [4]Wei Zexun,Fang Guohong,Choi Byung-Ho,et al.Sea surfaceheight and transport streamfunction of the South China Sea fromavariable-grid global ocean circulation model[J].Sciencein China(Se-ries D),2003,46(2):139-148.
- [5]Chen J L,Wilson C R,Chambers D P,et al.Seasonal global watermass budget and mean sealevel variations[J].Geophysical ResearchLetters,1998,25(19):3555-3558.
- [6]Chen J L,Shum C K,Wilson C R,et al.Seasonal sea level changefrom Topex/Poseidon observation and thermal contribution[J].JGeodesy,2000,73:638-647.
- [7]Zuo J C,Zhang J L,Du L,et al.Sea-level variation/change andthermal contributionin the Bering Sea[J].Acta Oceanologica Sini-ca,2005,24(6):36-45.
- [8]Smith R D,Dukowicz J K,Malone R C.Parallel ocean general circu-lation modeling[J].Physica,1992,D,60:38-61.
- [9]Collins WD,Coauthors.The community cli mate system model version 3(CCSM3)[J].Journal of Cli mate,2006,19:2122-2143.
- [10]蔡怡,李毓湘.南海冬季环流数值模拟[J].热带海洋,1999,18(2):48-55.
- [11]Li Yuxiang,Cai Yi.Numerical si mulation of the kuroshio usingnested model of three-di mensional baroclinic circulation[J].Chin JOceanol Li mnol,1999,17(1):19-28.
- [12]Cai Yi,Li Yuxiang.A3-di mensional baroclinic circulation model ofthe tropical and northern pacific[J].1997,15(1):70-79.
- [13]Boyer T,Levitus S,Hernan G,et al.Objective analyses of annual,seasonal,and monthlytemperature andsalinityfor the world ocean ona 0.25°grid[J].Inter J of Cli matol,2005,25(7):931-945.
- [14]Wu Jin.Wind2stress coefficients over sea surfacefrombreezeto hur-ricane[J].J Geophys Res,1982,87:9704-9706.
- [15]中国大百科全书编委会.中国大百科全书,大气科学、海洋科学、水文科学卷[M].北京:中国大百科全书出版社,1987:1-923.
- [16]Thomson R E,Tabata S.Steric sealevel trendsinthe northeast Pa-cific Ocean:Possible evidence of global sealevel rise[J].J Cli mate,1989,2:542-553.
- [17]Ishii M,Shouji A,Sugi moto S,et al.Objective analyses of SSTandmarine meteorological variables for the 20th century using ICOADSand the Kobe Collection[J].Int J Cli matol,2005,25:865-879.
文章评论(Comment):
|
||||||||||||||||||
|
||||||||||||||||||