全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

切变波动力学研究Ⅰ.尺度分析与频散关系

, PP. 659-665

Full-Text   Cite this paper   Add to My Lib

Abstract:

本研究从卫星遥感信息入手,对出现在西部边界流与陆坡水之间边界上的切变波动态过程进行了观测与动力学分析,由NOAA卫星红外图像测得的哈特勒斯(Hatteras)角以东,湾流北侧的切变波平均波长为75km,平均波幅(波峰至波谷)为17km,平均相速度为100cm/s,黑潮北侧的切变波平均波长为57km,平均波幅为17km,由Seasat-1合成孔径雷达(SAR)图像测得的哈特勒斯角以南,湾流西侧的切变波平均波长为131km,平均波幅为33km,一次切变波事件的持续时间约为一周.为探讨切变波的动力机制,我们求解了层化流体的涡度方程,得出了切变波频散关系的解析表达式,结果表明,切变波相速度与波长成抛物线关系;平均流场是频散关系中的重要因子,后一点表明流速水平切向变化是切变波发生的基本条件,理论分析为卫星遥感数据所证实.

References

[1]  Von Arx,W.S.et al.,On the fine-structure of the Gulf Stream front,Deef Sea Res,3(1955).46-55.
[2]  Webster,F,A description of Gulf Stream meanders off Onslow Bay,Deep Sea Res,3(1961).130-143.
[3]  Legeckis,R.V.,satellite observations of the influence of bottom topography on the seaward deflection of the Gulf Stream off Charleston,South Carolina,J.P.O.9(1979),483-497.
[4]  Mollo-Christensen,E.et al.,Method for estimation of ocean current velocity,from satelite images,Science,212(1981),661-662
[5]  Ramp.S.R.et al.An observations of frontal wave development on a shelf slope/warm core ring front near the shelf break south of New England.J.P.O.,13(1983),907-912.
[6]  Fuglister,F.C.,Annual variations in current speeds in the Gulf Stream system,J.Mar,Res.,10(1951).119-127.
[7]  Brooks,D.A.and J.M.Bane.Jr,Gulf Stream meanders off North Carolina during winter and summer 1979,J,G,R.,83(1983),4633-4650.
[8]  Pedlosky,J,Geophysical Fluid Dynamics.SPringer-Verlag.1979,323-346.
[9]  Worthington.L,V.,On the North Atlantic Circulation,The Johns Hopkins university Press,1976,104,
[10]  郑全安等,湾流北侧切变波卫星观测与发生机理研究,海洋与湖沼,16(1985).1,1-9.
[11]  Lee.T.et al,Observations of a Gulf Stream frontal eddy on the Georgia continental shelf.April 1977,Deep Sea Res 28(1981),347-378.
[12]  Pillsbury,J.E.,The Gulf Stream,For year ending June 1890,rep.supp.,append.10.U.S.Coastal and Geod.Surv.,1891.
[13]  Derycke,R.J,and P,K,Rao,Eddies along a Gulf Stream boundary viewed from a very high resolution radiometer,J,P.O.,3(1973).490-492.
[14]  Legeckis.R.and A.L.Gorden,Satellite observations of the Brazi! and Falkland currents 1975 to 1976 and 1978,Deep Sea Res,29(1982),375-401.
[15]  Zheng Quanan and Yuan Yeli,Intermediate-scale wave motion in shallow water shear curent.J.G,R.,91(1986),C3;3959-3965.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133