A Climatological Study of Hurricane Force Extratropical Cyclones
Using data compiled by the National Weather Service Ocean Prediction Center, a hurricane force extratropical cyclone climatology is created for three cold seasons. Using the criteria of Sanders and Gyakum (1980), it is found that 75% of the 259 storms explosively deepened. The frequency maximum in t...
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Monterey, California. Naval Postgraduate School
2012
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ftnavalpschool:oai:calhoun.nps.edu:10945/6821 2024-06-09T07:46:27+00:00 A Climatological Study of Hurricane Force Extratropical Cyclones Laiyemo, Razaak O. Moore, Richard Meteorology Physical Oceanography Nuss, Wendell 2012-03 application/pdf https://hdl.handle.net/10945/6821 unknown Monterey, California. Naval Postgraduate School https://hdl.handle.net/10945/6821 Extratropical Cyclones Hurricane Vorticity Climatology Explosive Deepening Composite Anomaly and Ensemble Thesis 2012 ftnavalpschool 2024-05-15T00:43:36Z Using data compiled by the National Weather Service Ocean Prediction Center, a hurricane force extratropical cyclone climatology is created for three cold seasons. Using the criteria of Sanders and Gyakum (1980), it is found that 75% of the 259 storms explosively deepened. The frequency maximum in the Atlantic basin is located to the southeast of Greenland. In the Pacific, two maxima to the east of Japan are identified. These results are in good agreement with previous studies, despite different cyclone subgroups, datasets, and methodologies. Composite analyses illustrate the hurricane force wind subgroup of extratropical cyclones, similar to other extratropical cyclones, form in regions of anomalously strong baroclinicity and begin to intensify upstream of an upper-level positive PV anomaly. By the end of the 24-hour period of maximum deepening rate, the composite storm structure appears nearly vertically stacked. Shortly after this time, the storm begins to weaken. There is some indication that diabatic processes serve as an additional energy source. Brief examination of predictability using ECMWF and NCEP ensemble data to analyze two randomly-selected storms indicate significant features like storm track and intensity are not properly captured by the ensemble prediction systems. Lieutenant Commander, United States Navy http://archive.org/details/aclimatologicals109456821 Thesis Greenland Naval Postgraduate School: Calhoun Greenland Pacific |
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Naval Postgraduate School: Calhoun |
op_collection_id |
ftnavalpschool |
language |
unknown |
topic |
Extratropical Cyclones Hurricane Vorticity Climatology Explosive Deepening Composite Anomaly and Ensemble |
spellingShingle |
Extratropical Cyclones Hurricane Vorticity Climatology Explosive Deepening Composite Anomaly and Ensemble Laiyemo, Razaak O. A Climatological Study of Hurricane Force Extratropical Cyclones |
topic_facet |
Extratropical Cyclones Hurricane Vorticity Climatology Explosive Deepening Composite Anomaly and Ensemble |
description |
Using data compiled by the National Weather Service Ocean Prediction Center, a hurricane force extratropical cyclone climatology is created for three cold seasons. Using the criteria of Sanders and Gyakum (1980), it is found that 75% of the 259 storms explosively deepened. The frequency maximum in the Atlantic basin is located to the southeast of Greenland. In the Pacific, two maxima to the east of Japan are identified. These results are in good agreement with previous studies, despite different cyclone subgroups, datasets, and methodologies. Composite analyses illustrate the hurricane force wind subgroup of extratropical cyclones, similar to other extratropical cyclones, form in regions of anomalously strong baroclinicity and begin to intensify upstream of an upper-level positive PV anomaly. By the end of the 24-hour period of maximum deepening rate, the composite storm structure appears nearly vertically stacked. Shortly after this time, the storm begins to weaken. There is some indication that diabatic processes serve as an additional energy source. Brief examination of predictability using ECMWF and NCEP ensemble data to analyze two randomly-selected storms indicate significant features like storm track and intensity are not properly captured by the ensemble prediction systems. Lieutenant Commander, United States Navy http://archive.org/details/aclimatologicals109456821 |
author2 |
Moore, Richard Meteorology Physical Oceanography Nuss, Wendell |
format |
Thesis |
author |
Laiyemo, Razaak O. |
author_facet |
Laiyemo, Razaak O. |
author_sort |
Laiyemo, Razaak O. |
title |
A Climatological Study of Hurricane Force Extratropical Cyclones |
title_short |
A Climatological Study of Hurricane Force Extratropical Cyclones |
title_full |
A Climatological Study of Hurricane Force Extratropical Cyclones |
title_fullStr |
A Climatological Study of Hurricane Force Extratropical Cyclones |
title_full_unstemmed |
A Climatological Study of Hurricane Force Extratropical Cyclones |
title_sort |
climatological study of hurricane force extratropical cyclones |
publisher |
Monterey, California. Naval Postgraduate School |
publishDate |
2012 |
url |
https://hdl.handle.net/10945/6821 |
geographic |
Greenland Pacific |
geographic_facet |
Greenland Pacific |
genre |
Greenland |
genre_facet |
Greenland |
op_relation |
https://hdl.handle.net/10945/6821 |
_version_ |
1801376294005374976 |