A Global Climatology of Extratropical Transition. Part I: Characteristics across Basins
The authors present a global climatology of tropical cyclones (TCs) that undergo extratropical transition (ET). ET is objectively defined based on a TC’s trajectory through the cyclone phase space (CPS), which is calculated using storm tracks from 1979–2017 best track data and geopotential height fi...
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ftcolumbiauniv:oai:academiccommons.columbia.edu:10.7916/d8-n0mk-qx05 2023-05-15T17:29:21+02:00 A Global Climatology of Extratropical Transition. Part I: Characteristics across Basins Bieli, Melanie Camargo, Suzana J. Sobel, Adam H. Evans, Jenni L. Hall, Timothy M. 2019 https://doi.org/10.7916/d8-n0mk-qx05 English eng https://doi.org/10.7916/d8-n0mk-qx05 Climatology Cyclones Hurricanes Articles 2019 ftcolumbiauniv https://doi.org/10.7916/d8-n0mk-qx05 2020-01-11T23:20:04Z The authors present a global climatology of tropical cyclones (TCs) that undergo extratropical transition (ET). ET is objectively defined based on a TC’s trajectory through the cyclone phase space (CPS), which is calculated using storm tracks from 1979–2017 best track data and geopotential height fields from reanalysis datasets. Two reanalyses are used and compared for this purpose, the Japanese 55-yr Reanalysis and the ECMWF interim reanalysis. The results are used to study the seasonal and geographical distributions of storms undergoing ET and interbasin differences in the statistics of ET occurrence. About 50% of all TCs in the North Atlantic and the western North Pacific undergo ET. In the Southern Hemisphere, ET fractions range from about 20% in the south Indian Ocean and the Australian region to 45% in the South Pacific. In the majority of ETs, TCs become thermally asymmetric before forming a cold core. However, a substantial fraction of TCs take the reverse pathway, developing a cold core before becoming thermally asymmetric. This pathway is most common in the eastern North Pacific and the North Atlantic. Different ET pathways can be linked to different geographical trajectories and environmental settings. In ETs over warmer sea surface temperatures, TCs tend to lose their thermal symmetry while still maintaining a warm core. Landfalls by TCs undergoing ET occur 3–4 times per year in the North Atlantic and 7–10 times per year in the western North Pacific, while coastal regions in the Australian region are affected once every 1–2 years. Article in Journal/Newspaper North Atlantic Columbia University: Academic Commons Indian Pacific |
institution |
Open Polar |
collection |
Columbia University: Academic Commons |
op_collection_id |
ftcolumbiauniv |
language |
English |
topic |
Climatology Cyclones Hurricanes |
spellingShingle |
Climatology Cyclones Hurricanes Bieli, Melanie Camargo, Suzana J. Sobel, Adam H. Evans, Jenni L. Hall, Timothy M. A Global Climatology of Extratropical Transition. Part I: Characteristics across Basins |
topic_facet |
Climatology Cyclones Hurricanes |
description |
The authors present a global climatology of tropical cyclones (TCs) that undergo extratropical transition (ET). ET is objectively defined based on a TC’s trajectory through the cyclone phase space (CPS), which is calculated using storm tracks from 1979–2017 best track data and geopotential height fields from reanalysis datasets. Two reanalyses are used and compared for this purpose, the Japanese 55-yr Reanalysis and the ECMWF interim reanalysis. The results are used to study the seasonal and geographical distributions of storms undergoing ET and interbasin differences in the statistics of ET occurrence. About 50% of all TCs in the North Atlantic and the western North Pacific undergo ET. In the Southern Hemisphere, ET fractions range from about 20% in the south Indian Ocean and the Australian region to 45% in the South Pacific. In the majority of ETs, TCs become thermally asymmetric before forming a cold core. However, a substantial fraction of TCs take the reverse pathway, developing a cold core before becoming thermally asymmetric. This pathway is most common in the eastern North Pacific and the North Atlantic. Different ET pathways can be linked to different geographical trajectories and environmental settings. In ETs over warmer sea surface temperatures, TCs tend to lose their thermal symmetry while still maintaining a warm core. Landfalls by TCs undergoing ET occur 3–4 times per year in the North Atlantic and 7–10 times per year in the western North Pacific, while coastal regions in the Australian region are affected once every 1–2 years. |
format |
Article in Journal/Newspaper |
author |
Bieli, Melanie Camargo, Suzana J. Sobel, Adam H. Evans, Jenni L. Hall, Timothy M. |
author_facet |
Bieli, Melanie Camargo, Suzana J. Sobel, Adam H. Evans, Jenni L. Hall, Timothy M. |
author_sort |
Bieli, Melanie |
title |
A Global Climatology of Extratropical Transition. Part I: Characteristics across Basins |
title_short |
A Global Climatology of Extratropical Transition. Part I: Characteristics across Basins |
title_full |
A Global Climatology of Extratropical Transition. Part I: Characteristics across Basins |
title_fullStr |
A Global Climatology of Extratropical Transition. Part I: Characteristics across Basins |
title_full_unstemmed |
A Global Climatology of Extratropical Transition. Part I: Characteristics across Basins |
title_sort |
global climatology of extratropical transition. part i: characteristics across basins |
publishDate |
2019 |
url |
https://doi.org/10.7916/d8-n0mk-qx05 |
geographic |
Indian Pacific |
geographic_facet |
Indian Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://doi.org/10.7916/d8-n0mk-qx05 |
op_doi |
https://doi.org/10.7916/d8-n0mk-qx05 |
_version_ |
1766123261681205248 |