ROLES OF JET SUPERPOSITION AND POTENTIAL VORTICITY IN THE WESTERN NORTH PACIFIC EXPLOSIVE CYCLOGENESIS EVENT
In December 2020, the Western North Pacific was active with extratropical low-pressure weather events. During the final week of 2020, there was a record-breaking 1092 millibar high-pressure system over Mongolia, and 24 hours later, a 921 millibar extratropical low-pressure system over Western Alaska...
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Monterey, CA; Naval Postgraduate School
2022
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ftnavalpschool:oai:calhoun.nps.edu:10945/71544 2024-06-09T07:50:11+00:00 ROLES OF JET SUPERPOSITION AND POTENTIAL VORTICITY IN THE WESTERN NORTH PACIFIC EXPLOSIVE CYCLOGENESIS EVENT Schultz, Theresa C. Nuss, Wendell A. Meteorology (MR) Boothe, Mark A. 2022-12 application/pdf https://hdl.handle.net/10945/71544 unknown Monterey, CA; Naval Postgraduate School 373, Meteorology and Oceanography (METOC) 38523 https://hdl.handle.net/10945/71544 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. jet stream superposition potential vorticity extratropical low pressure pressure anomalies waveguide Thesis 2022 ftnavalpschool 2024-05-15T00:47:40Z In December 2020, the Western North Pacific was active with extratropical low-pressure weather events. During the final week of 2020, there was a record-breaking 1092 millibar high-pressure system over Mongolia, and 24 hours later, a 921 millibar extratropical low-pressure system over Western Alaska. These two extremes were associated with pressure anomalies for the basin and a jet superposition of the polar and subtropical jet streams. Superposition events are rare but occur in this region during winter. The Climate Forecast System Reanalysis (CFSR) data was used to examine jet superposition using 200 and 300 millibar winds and potential vorticity channels or waveguides in relation to the development of extratropical cyclones. Results indicated that PV channeling from Siberia in a northern airstream combined with jet superposition between the subtropical and polar jets resulted in rapid intensification. Using PV channels and their merging as an indicator could be a valuable forecast tool for extratropical cyclone intensification. Analyzing events such as these will allow forecasters to better prepare Naval assets in the Western Pacific for extreme events. Approved for public release. Distribution is unlimited. Lieutenant, United States Navy Thesis Alaska Siberia Naval Postgraduate School: Calhoun Pacific |
institution |
Open Polar |
collection |
Naval Postgraduate School: Calhoun |
op_collection_id |
ftnavalpschool |
language |
unknown |
topic |
jet stream superposition potential vorticity extratropical low pressure pressure anomalies waveguide |
spellingShingle |
jet stream superposition potential vorticity extratropical low pressure pressure anomalies waveguide Schultz, Theresa C. ROLES OF JET SUPERPOSITION AND POTENTIAL VORTICITY IN THE WESTERN NORTH PACIFIC EXPLOSIVE CYCLOGENESIS EVENT |
topic_facet |
jet stream superposition potential vorticity extratropical low pressure pressure anomalies waveguide |
description |
In December 2020, the Western North Pacific was active with extratropical low-pressure weather events. During the final week of 2020, there was a record-breaking 1092 millibar high-pressure system over Mongolia, and 24 hours later, a 921 millibar extratropical low-pressure system over Western Alaska. These two extremes were associated with pressure anomalies for the basin and a jet superposition of the polar and subtropical jet streams. Superposition events are rare but occur in this region during winter. The Climate Forecast System Reanalysis (CFSR) data was used to examine jet superposition using 200 and 300 millibar winds and potential vorticity channels or waveguides in relation to the development of extratropical cyclones. Results indicated that PV channeling from Siberia in a northern airstream combined with jet superposition between the subtropical and polar jets resulted in rapid intensification. Using PV channels and their merging as an indicator could be a valuable forecast tool for extratropical cyclone intensification. Analyzing events such as these will allow forecasters to better prepare Naval assets in the Western Pacific for extreme events. Approved for public release. Distribution is unlimited. Lieutenant, United States Navy |
author2 |
Nuss, Wendell A. Meteorology (MR) Boothe, Mark A. |
format |
Thesis |
author |
Schultz, Theresa C. |
author_facet |
Schultz, Theresa C. |
author_sort |
Schultz, Theresa C. |
title |
ROLES OF JET SUPERPOSITION AND POTENTIAL VORTICITY IN THE WESTERN NORTH PACIFIC EXPLOSIVE CYCLOGENESIS EVENT |
title_short |
ROLES OF JET SUPERPOSITION AND POTENTIAL VORTICITY IN THE WESTERN NORTH PACIFIC EXPLOSIVE CYCLOGENESIS EVENT |
title_full |
ROLES OF JET SUPERPOSITION AND POTENTIAL VORTICITY IN THE WESTERN NORTH PACIFIC EXPLOSIVE CYCLOGENESIS EVENT |
title_fullStr |
ROLES OF JET SUPERPOSITION AND POTENTIAL VORTICITY IN THE WESTERN NORTH PACIFIC EXPLOSIVE CYCLOGENESIS EVENT |
title_full_unstemmed |
ROLES OF JET SUPERPOSITION AND POTENTIAL VORTICITY IN THE WESTERN NORTH PACIFIC EXPLOSIVE CYCLOGENESIS EVENT |
title_sort |
roles of jet superposition and potential vorticity in the western north pacific explosive cyclogenesis event |
publisher |
Monterey, CA; Naval Postgraduate School |
publishDate |
2022 |
url |
https://hdl.handle.net/10945/71544 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Alaska Siberia |
genre_facet |
Alaska Siberia |
op_relation |
373, Meteorology and Oceanography (METOC) 38523 https://hdl.handle.net/10945/71544 |
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_ |
1801383426398355456 |