Abstract
Motion in planetary geostrophic equations (PGEs) is represented by the three-dimensional geostrophic wind (u(g), v(g), w(g)) where ug and v(g) are the standard horizontal components while the vertical component w(g) can be derived, for example, from the Richardson equation. However, this vertical component appears not to have been evaluated as yet on the basis of data nor compared to the actual vertical component w. Part of this missing information is provided here by an evaluation of w(g) from observations and by analyzing the role of wg in linear versions of PGEs. The time mean fields (w(g) ) over cap in the Northern Hemisphere as well as the standard deviations sigma(wg) are compared to the correponding fields of w. It is found that (w(g)) over cap comes reasonably close to (w) over cap in the troposphere but deviates widely in the stratosphere while sigma(wg) is smaller than sigma(w) in the troposphere but not in the stratosphere. Linear wave motion is discussed and the linear steady-state response to the forcing by heat sources and mountains is explored to explain these results.
| Dokumententyp: | Zeitschriftenartikel |
|---|---|
| Fakultät: | Physik |
| Themengebiete: | 500 Naturwissenschaften und Mathematik > 530 Physik |
| ISSN: | 0035-9009 |
| Sprache: | Englisch |
| Dokumenten ID: | 54020 |
| Datum der Veröffentlichung auf Open Access LMU: | 14. Jun. 2018, 09:54 |
| Letzte Änderungen: | 04. Nov. 2020, 13:33 |
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