气侯平均风场作用下热带太平洋主流系和赤道行星波研究
Investigation of main current system and equatorial planetary wavesin the tropical Pacific by action of climatic average wind field
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摘要: 将两层约化重力原始流体动力方程耦合气候月平均风场,数值计算流场基本能够正确反映热带太平洋上层主流系和温跃层的空间分布和季节变化.在气候平均条件下,东太平洋125°W附近经向风应力可激发出高阶混合Rossby重力波.海洋高阶赤道Kelvin波流速模态可从西太平洋边界传播到东太平洋边界,而高阶赤道Kelvin波温跃层模态从西太平洋边界东传后,在中太平洋受到高阶混合Rossby重力波诱发的西传温跃层扰动的阻挡.
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关键词:
- 主流系 /
- 温跃层 /
- 赤道Kelvin波 /
- 混合Rossby重力波
Abstract: The current field was calculated on the basis of the coupling model of a two-layer, reduced gravity primitive equation and the climatic average wind field. The result correctly shows space distribution and season variety of the main current system and thermocline of upper layer in the tropical Pacific. The mixed Rossby-gravity waves were excited by meridional wind stress on 125°W equatorial Pacific. In the climatic condition, the equatorial Kelvin wave current model could be transported from the western equatorial Pacific border to the eastern border, but the equatorial Kelvin wave thermocline model was not, because it was prevented by the westward thermocline perturbation which was excited by mixed Rossby-gravity in the central equatorial Pacific.-
Key words:
- Main current system /
- thermocline /
- equatorial Kelvin wave /
- mixed Rossby-gravity
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Cane M A.The response of an equatorial ocean to simple wind stress patterns I.Model formulation and analytic results.J.Mar.Res.,1979,37,233-252 Charney J G,Spiegel S.Structure of wind-driven equatorial currents in homogeneous oceans.J.Phys.Oceanogr.,1971,(1):149-160 Charney J G.Non-linear theory of a wind-driven homogeneous layer near the equator.Deep-Sea Res.,1960,(6):303-310 Lorenz E N.An N cycle time problem differencing scheme for stepwise numerical integration.Mon.Wea.Rev.,1971,99,644-648 Shapiro R.Smoothing,filtering,and boundary effects.Rev,of Geophys.and Spac.Phys.,1970,8,359-387 Barnett T P.The principal time and space scales of the Pacific trade wind fields.J.Atoms.Sci.,1977,34,221-236 Goldenberg S,O'Brien J J.Time and space variability of the tropical Pacific wind stress.Mon.Wea.Rev.,1981,109,1190-1207 Horel D J.On the annual cycle of the tropical Pacific atmosphere and ocean.Mon.Wea.Rev.,1982,110,1 863-1 878 Wyrtki K,Meyers G.The trade wind field over the Pacific Ocean.Appl.Meteor.,1976,15,698-704 Cane M A,The response of an equatorial ocean to simple wind stress patterns II.Numerical results.J.Mar.Res.,1979,37,253-299 Rebert J P,Donguy J R,Eldin G.Relations between sea level,thermocline depth,heat content,and dynamic height in the tropical Pacific Ocean.J.Geophys.Res.,1985,90,(C6):11719-11725 Delcroix T,Eldin G,Henin C.Upper ocean water masses and transport in the western tropical Pacific(165°E).J.Phys.Oceanogy,1987,17,2 248-2 262 Gouriou Y.Mean circulation of the upper layers of the western equatorial Pacific Ocean.J.Geophys.Res.,1993,98(C12):22 495-22 520 Halpern D.Observations of annual and El Niño thermal and flow variations at 0°,110°W and 0°,95°W during 1980-1985.J Geophys.Res 1987,92(C8):8197-8 212 Knauss J、.Further measurements and observations on the Cromwell Current.J.Mar.Res.,1966,24,205-240 Lukas R.The termination of the Equatorial Undercurrent in the Eastern Pacific.Prog.Oceanog.,1986,16,63-90 Philander S G H.Equatorial Undercurrent:measurements and theories.Rev.Geophy.and Spac.Phys.,1973,11,513-570 Tsuchiya M.Subsurface countercurrents in the eastern equatorial Pacific Ocean.J.Mar.Res.,1975,Suppl.,145-175 Wijffels S,Firing E,Toole J.The mean structure and variability of the Mindanao Current at 80N.J.Geophys.Res.,1995,100(C9):18 421-18 435 Chiswell S M,Lukas R.Rossby-gravity waves in the central equatorial Pacific Ocean during the NORPAX Hawaii-to-Tahiti Shuttle experiment.J.Geophys.Res.,1989,94(C2):2 091-2 098 Blandford R.Mixed gravity-Rossby waves in the ocean.Deep-Sea Res.,1996,(13):941-961 Wunsch C,Gill A E.Observation of equatorially trapped waves in Pacific sea level variations.Deep-Sea.Res.,1976,23,371-390 Ripa P,Hayes S P.Evidence for equatorial trapped waves at the Galapagos Islands.J.Geophys.Res.,1981,86(C7):6 509-6 516 Gill A E.Atmosphere-Ocean Dynamics.Academic Press,1982,666
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