The importance of non-quasigeostrophic forcing during the development of a blocking anticyclone
This study examines the impact of non-quasigeostrophic (NQG) processes during the development of a blocking anticyclone (January 21, 1979 over the southern tip of Greenland) and a precursor, upstream intense cyclone (January 18, 1979). Energy quantities and height tendencies determined from quasigeo...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19910026408 2023-05-15T16:29:04+02:00 The importance of non-quasigeostrophic forcing during the development of a blocking anticyclone Tsou, Chih-Hua Smith, Phillip J. Unclassified, Unlimited, Publicly available May 1, 1990 http://ntrs.nasa.gov/search.jsp?R=19910026408 unknown http://ntrs.nasa.gov/search.jsp?R=19910026408 Accession ID: 91A11031 Copyright Other Sources 47 Tellus, Series A - Dynamic Meteorology and Oceanography; 42A; 328-342 1990 ftnasantrs 2012-02-15T18:53:06Z This study examines the impact of non-quasigeostrophic (NQG) processes during the development of a blocking anticyclone (January 21, 1979 over the southern tip of Greenland) and a precursor, upstream intense cyclone (January 18, 1979). Energy quantities and height tendencies determined from quasigeostrophic estimates are compared with the same quantities obtained from more general formulations. GLA FGGE Level III-b analysis on a 4 deg lat by 5 deg long grid was used to obtain energetics results. It is concluded that NQG processes strengthened the intensity of the block and a precursor explosive cyclone and that a portion of this increase resulted from enhanced baroclinic conversion of eddy potential to eddy kinetic energy and reduced barotropic energy conversion from eddy to zonal flow. It is suggested that NQG vorticity advection, instead of moderating wave developments, enhanced the block development, and it is also suggested that QG forcing might not have been adequate to produce the observed block development. Other/Unknown Material Greenland NASA Technical Reports Server (NTRS) Greenland |
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47 Tsou, Chih-Hua Smith, Phillip J. The importance of non-quasigeostrophic forcing during the development of a blocking anticyclone |
topic_facet |
47 |
description |
This study examines the impact of non-quasigeostrophic (NQG) processes during the development of a blocking anticyclone (January 21, 1979 over the southern tip of Greenland) and a precursor, upstream intense cyclone (January 18, 1979). Energy quantities and height tendencies determined from quasigeostrophic estimates are compared with the same quantities obtained from more general formulations. GLA FGGE Level III-b analysis on a 4 deg lat by 5 deg long grid was used to obtain energetics results. It is concluded that NQG processes strengthened the intensity of the block and a precursor explosive cyclone and that a portion of this increase resulted from enhanced baroclinic conversion of eddy potential to eddy kinetic energy and reduced barotropic energy conversion from eddy to zonal flow. It is suggested that NQG vorticity advection, instead of moderating wave developments, enhanced the block development, and it is also suggested that QG forcing might not have been adequate to produce the observed block development. |
format |
Other/Unknown Material |
author |
Tsou, Chih-Hua Smith, Phillip J. |
author_facet |
Tsou, Chih-Hua Smith, Phillip J. |
author_sort |
Tsou, Chih-Hua |
title |
The importance of non-quasigeostrophic forcing during the development of a blocking anticyclone |
title_short |
The importance of non-quasigeostrophic forcing during the development of a blocking anticyclone |
title_full |
The importance of non-quasigeostrophic forcing during the development of a blocking anticyclone |
title_fullStr |
The importance of non-quasigeostrophic forcing during the development of a blocking anticyclone |
title_full_unstemmed |
The importance of non-quasigeostrophic forcing during the development of a blocking anticyclone |
title_sort |
importance of non-quasigeostrophic forcing during the development of a blocking anticyclone |
publishDate |
1990 |
url |
http://ntrs.nasa.gov/search.jsp?R=19910026408 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19910026408 Accession ID: 91A11031 |
op_rights |
Copyright |
_version_ |
1766018757189173248 |