caa a22 4500 475813499 CHVBK 20180406123803.0 cr unu---uuuuu 170329e20001001xx s 000 0 eng 10.1007/PL00001060 doi (NATIONALLICENCE)springer-10.1007/PL00001060 Raymond W. H. Cooperative Institute for Meteorological Satellite Studies, University of Wisconsin, 1225 West Dayton Street, Madison, Wisconsin 53706, U.S.A. E-mail: wraymond@mail.ssec.wisc.edu Telefacsimile: 608 2625974., US aut Equatorial Meridional Flows: Rotationally Induced Circulations [Elektronische Daten] [W. H. Raymond] —This study examines two-dimensional large-scale atmospheric circulations that are centered over the equator. The influence of terms that contain the Coriolis parameter ƒ′=2ΩcosΘ is highlighted in a simple linear inviscid equatorial beta model. Two general types of oscillatory circulations are identified within the y-z plane. In a neutral or stably stratified atmosphere one circulation is expressed in terms of an analytic solution that contains Hermite polynomials, while a second solution is described in terms of a Bessel function. In the more traditional Hermite polynomial solution the influence of f′ is small as suggested by scale analysis. Neutral stability provides the only exception. In contrast to these findings, the Bessel solution contains frequencies with semiannual periods that depend entirely on ƒ′≠0. This solution describes cross-equatorial flow with a maximum meridional velocity at the equator. Consequently, this indicates that to model the atmosphere it is necessary to include in the model equations all terms containing f′, since they influence oscillatory circulations that describe internal waves with periods that vary from a few days to semiannual. Birkhäuser Verlag Basel,, 2000 Key Words: Meridional flow, Coriolis parameters, equatorial flow, oscillations, analytic solutions, y - z plane nationallicence https://doi.org/10.1007/PL00001060 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/PL00001060 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Raymond W. H. Cooperative Institute for Meteorological Satellite Studies, University of Wisconsin, 1225 West Dayton Street, Madison, Wisconsin 53706, U.S.A. E-mail: wraymond@mail.ssec.wisc.edu Telefacsimile: 608 2625974., US aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer