Analyzed potential vorticity fields for explosive and non-explosive cyclogenesis events during FGGE.
Potential vorticity and jet streak properties associated with 23 explosive and non-explosive cyclones from the western North Atlantic and western North Pacific Oceans are analyzed for the period 17 January to 23 February 1979. ECMWF analyses with FGGE data are used to represent the 300 mb wind field...
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ftnavalpschool:oai:calhoun.nps.edu:10945/21668 2024-06-09T07:48:17+00:00 Analyzed potential vorticity fields for explosive and non-explosive cyclogenesis events during FGGE. Kirchoffer, Peter J. Elsberry, R.L. Naval Postgraduate School (U.S.) Meteorology Wash, C.H. 1986-09 63 p. application/pdf https://hdl.handle.net/10945/21668 en_US eng https://hdl.handle.net/10945/21668 This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States. potential vorticity jet streaks explosive cyclogenesis vorticity advection Meteorology Thesis 1986 ftnavalpschool 2024-05-15T00:33:09Z Potential vorticity and jet streak properties associated with 23 explosive and non-explosive cyclones from the western North Atlantic and western North Pacific Oceans are analyzed for the period 17 January to 23 February 1979. ECMWF analyses with FGGE data are used to represent the 300 mb wind fields over these ocean areas. Relative maxima in potential vorticity are present upstream of all cyclones. Storm tracks with respect to the potential vorticity maxima are counter-clockwise with the greatest sea-level pressure decreases occurring when the storm is to the east or southeast of the maximum, whereas pressure falls diminish when the cyclone is north of the maximum. Only five of the 23 cases have a pre-existing potential vorticity lobe that becomes superposed with the surface feature and enhances cyclogenesis. In the remaining cases, the cyclone and potential vorticity lobe propagate and develop concurrently. The presence of a jet maxima over the storm is a major factor in storm development with large pressure falls being directly related to higher 300 mb wind speeds. In 20 of 23 cases, the storm is in the left-front jet quadrant at some time during its development. A statistical analysis demonstrates that forecasting the actual values of 12-h pressure falls from the potential vorticity and wind fields is difficult. However, forecasting development within one of three intensity categories using a discriminate analysis technique may approach 90% accuracy for explosive cyclones. Approved for public release; distribution is unlimited. Lieutenant, United States Navy http://archive.org/details/analyzedpotentia1094521668 Thesis North Atlantic Naval Postgraduate School: Calhoun Pacific |
institution |
Open Polar |
collection |
Naval Postgraduate School: Calhoun |
op_collection_id |
ftnavalpschool |
language |
English |
topic |
potential vorticity jet streaks explosive cyclogenesis vorticity advection Meteorology |
spellingShingle |
potential vorticity jet streaks explosive cyclogenesis vorticity advection Meteorology Kirchoffer, Peter J. Analyzed potential vorticity fields for explosive and non-explosive cyclogenesis events during FGGE. |
topic_facet |
potential vorticity jet streaks explosive cyclogenesis vorticity advection Meteorology |
description |
Potential vorticity and jet streak properties associated with 23 explosive and non-explosive cyclones from the western North Atlantic and western North Pacific Oceans are analyzed for the period 17 January to 23 February 1979. ECMWF analyses with FGGE data are used to represent the 300 mb wind fields over these ocean areas. Relative maxima in potential vorticity are present upstream of all cyclones. Storm tracks with respect to the potential vorticity maxima are counter-clockwise with the greatest sea-level pressure decreases occurring when the storm is to the east or southeast of the maximum, whereas pressure falls diminish when the cyclone is north of the maximum. Only five of the 23 cases have a pre-existing potential vorticity lobe that becomes superposed with the surface feature and enhances cyclogenesis. In the remaining cases, the cyclone and potential vorticity lobe propagate and develop concurrently. The presence of a jet maxima over the storm is a major factor in storm development with large pressure falls being directly related to higher 300 mb wind speeds. In 20 of 23 cases, the storm is in the left-front jet quadrant at some time during its development. A statistical analysis demonstrates that forecasting the actual values of 12-h pressure falls from the potential vorticity and wind fields is difficult. However, forecasting development within one of three intensity categories using a discriminate analysis technique may approach 90% accuracy for explosive cyclones. Approved for public release; distribution is unlimited. Lieutenant, United States Navy http://archive.org/details/analyzedpotentia1094521668 |
author2 |
Elsberry, R.L. Naval Postgraduate School (U.S.) Meteorology Wash, C.H. |
format |
Thesis |
author |
Kirchoffer, Peter J. |
author_facet |
Kirchoffer, Peter J. |
author_sort |
Kirchoffer, Peter J. |
title |
Analyzed potential vorticity fields for explosive and non-explosive cyclogenesis events during FGGE. |
title_short |
Analyzed potential vorticity fields for explosive and non-explosive cyclogenesis events during FGGE. |
title_full |
Analyzed potential vorticity fields for explosive and non-explosive cyclogenesis events during FGGE. |
title_fullStr |
Analyzed potential vorticity fields for explosive and non-explosive cyclogenesis events during FGGE. |
title_full_unstemmed |
Analyzed potential vorticity fields for explosive and non-explosive cyclogenesis events during FGGE. |
title_sort |
analyzed potential vorticity fields for explosive and non-explosive cyclogenesis events during fgge. |
publishDate |
1986 |
url |
https://hdl.handle.net/10945/21668 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://hdl.handle.net/10945/21668 |
op_rights |
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States. |
_version_ |
1801379949964165120 |