On the structure of atmospheric waves in middle latitudes
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| Format: | Artículo científico |
| Sprache: | en |
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Universidad Nacional Autónoma de México
2003
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| _version_ | 1876422388795572224 |
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| author | Aksel Wiin Nielsen |
| author_facet | Aksel Wiin Nielsen |
| contents | On the structure of atmospheric waves in middle latitudes Aksel Wiin Nielsen Biología middle latitudes atmospheric waves thermal and geopotential fields The investigation described in the present paper is concerned with the structure of atmospheric waves in themiddle latitudes. The typical wave in the troposphere has, according to observational studies, a differencebetween the thermal field and the geopotential field in such a way that the trough and the ridge in thetemperature field are located to the west of the corresponding curves for the geopotential field.A theory using a linear version of the two-level, quasi-nondivergent model including heating and dissipationis developed to explain these observed facts. Such a model will contain the possibility of baroclinic instabilityfor certain wavelengths for a sufficiently large vertical windshear. It is thus necessary to treat the stable andthe unstable cases separately. The applied techniques include both a numerical integration to steady state inthe stable cases and a detailed treatment of the perturbation equations in the unstable case. A calculationof the vertical velocity is included in order to show that these waves convert eddy available potential energyto eddy kinetic energy.The model equations are simplified in such a way that the independent variables are the variations bothin the zonal direction and in time. The model permits a calculation of the meridional transport of sensibleheat, but due to its simplicity the meridional transport of momentum is excluded. The calculated structureof the wave is in good agreement with the observed atmospheric waves in middle latitudes. 2003 artículo científico 0187-6236 https://www.redalyc.org/articulo.oa?id=56516202 en http://www.redalyc.org/revista.oa?id=565 Atmósfera application/pdf Universidad Nacional Autónoma de México Atmósfera (México) Num.2 Vol.16 |
| format | Artículo científico |
| id | redalyc_56516202 |
| institution | Redalyc |
| language | en |
| publishDate | 2003 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | On the structure of atmospheric waves in middle latitudes Aksel Wiin Nielsen Biología middle latitudes atmospheric waves thermal and geopotential fields On the structure of atmospheric waves in middle latitudes Aksel Wiin Nielsen Biología middle latitudes atmospheric waves thermal and geopotential fields The investigation described in the present paper is concerned with the structure of atmospheric waves in themiddle latitudes. The typical wave in the troposphere has, according to observational studies, a differencebetween the thermal field and the geopotential field in such a way that the trough and the ridge in thetemperature field are located to the west of the corresponding curves for the geopotential field.A theory using a linear version of the two-level, quasi-nondivergent model including heating and dissipationis developed to explain these observed facts. Such a model will contain the possibility of baroclinic instabilityfor certain wavelengths for a sufficiently large vertical windshear. It is thus necessary to treat the stable andthe unstable cases separately. The applied techniques include both a numerical integration to steady state inthe stable cases and a detailed treatment of the perturbation equations in the unstable case. A calculationof the vertical velocity is included in order to show that these waves convert eddy available potential energyto eddy kinetic energy.The model equations are simplified in such a way that the independent variables are the variations bothin the zonal direction and in time. The model permits a calculation of the meridional transport of sensibleheat, but due to its simplicity the meridional transport of momentum is excluded. The calculated structureof the wave is in good agreement with the observed atmospheric waves in middle latitudes. 2003 artículo científico 0187-6236 https://www.redalyc.org/articulo.oa?id=56516202 en http://www.redalyc.org/revista.oa?id=565 Atmósfera application/pdf Universidad Nacional Autónoma de México Atmósfera (México) Num.2 Vol.16 |
| title | On the structure of atmospheric waves in middle latitudes |
| topic | Biología middle latitudes atmospheric waves thermal and geopotential fields |
| url | https://www.redalyc.org/articulo.oa?id=56516202 |