Composite structure of tropopause polar cyclones
Tropopause polar vortices are coherent circulation features based on the tropopause in polar regions. They are a common feature of the Arctic, with typical radii less than 1500 km and lifetimes that may exceed 1 month. The Arctic is a particularly favorable region for these features due to isolation...
Published in: | Monthly Weather Review |
---|---|
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2010
|
Subjects: | |
Online Access: | http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-003-689 https://doi.org/10.1175/2010MWR3371.1 |
id |
ftncar:oai:drupal-site.org:articles_10867 |
---|---|
record_format |
openpolar |
spelling |
ftncar:oai:drupal-site.org:articles_10867 2023-07-30T04:01:06+02:00 Composite structure of tropopause polar cyclones Cavallo, Steven (author) Hakim, Gregory (author) 2010-10-01 application/pdf http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-003-689 https://doi.org/10.1175/2010MWR3371.1 en eng Monthly Weather Review http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-003-689 doi:10.1175/2010MWR3371.1 wos: 000283264600008 ark:/85065/d75x29gr Copyright 2010 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be "fair use" under Section 107 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Law (17 USC, as revised by P.L. 94-553) does not require the Society's permission. Republication, systematic reproduction, posting in electronic form on servers, or other uses of this material, except as exempted by the above statements, requires written permission or license from the AMS. Additional details are provided in the AMS Copyright Policies, available from the AMS at 617-227-2425 or amspubs@ametsoc.org. Permission to place a copy of this work on this server has been provided by the AMS. The AMS does not guarantee that the copy provided here is an accurate copy of the published work. Text article 2010 ftncar https://doi.org/10.1175/2010MWR3371.1 2023-07-17T18:17:53Z Tropopause polar vortices are coherent circulation features based on the tropopause in polar regions. They are a common feature of the Arctic, with typical radii less than 1500 km and lifetimes that may exceed 1 month. The Arctic is a particularly favorable region for these features due to isolation from the horizontal wind shear associated with the midlatitude jet stream, which may destroy the vortical circulation. Intensification of cyclonic tropopause polar vortices is examined here using an Ertel potential vorticity framework to test the hypothesis that there is an average tendency for diabatic effects to intensify the vortices due to enhanced upper-tropospheric radiative cooling within the vortices. Data for the analysis are derived from numerical simulations of a large sample of observed cyclonic vortices over the Canadian Arctic. Results show that there is on average a net tendency to create potential vorticity in the vortex, and hence intensify cyclones, and that the tendency is radiatively driven. While the effects of latent heating are considerable, they are smaller in magnitude, and all other diabatic processes have a negligible effect on vortex intensity. Article in Journal/Newspaper Arctic OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Arctic Monthly Weather Review 138 10 3840 3857 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
Tropopause polar vortices are coherent circulation features based on the tropopause in polar regions. They are a common feature of the Arctic, with typical radii less than 1500 km and lifetimes that may exceed 1 month. The Arctic is a particularly favorable region for these features due to isolation from the horizontal wind shear associated with the midlatitude jet stream, which may destroy the vortical circulation. Intensification of cyclonic tropopause polar vortices is examined here using an Ertel potential vorticity framework to test the hypothesis that there is an average tendency for diabatic effects to intensify the vortices due to enhanced upper-tropospheric radiative cooling within the vortices. Data for the analysis are derived from numerical simulations of a large sample of observed cyclonic vortices over the Canadian Arctic. Results show that there is on average a net tendency to create potential vorticity in the vortex, and hence intensify cyclones, and that the tendency is radiatively driven. While the effects of latent heating are considerable, they are smaller in magnitude, and all other diabatic processes have a negligible effect on vortex intensity. |
author2 |
Cavallo, Steven (author) Hakim, Gregory (author) |
format |
Article in Journal/Newspaper |
title |
Composite structure of tropopause polar cyclones |
spellingShingle |
Composite structure of tropopause polar cyclones |
title_short |
Composite structure of tropopause polar cyclones |
title_full |
Composite structure of tropopause polar cyclones |
title_fullStr |
Composite structure of tropopause polar cyclones |
title_full_unstemmed |
Composite structure of tropopause polar cyclones |
title_sort |
composite structure of tropopause polar cyclones |
publishDate |
2010 |
url |
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-003-689 https://doi.org/10.1175/2010MWR3371.1 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
Monthly Weather Review http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-003-689 doi:10.1175/2010MWR3371.1 wos: 000283264600008 ark:/85065/d75x29gr |
op_rights |
Copyright 2010 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be "fair use" under Section 107 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Law (17 USC, as revised by P.L. 94-553) does not require the Society's permission. Republication, systematic reproduction, posting in electronic form on servers, or other uses of this material, except as exempted by the above statements, requires written permission or license from the AMS. Additional details are provided in the AMS Copyright Policies, available from the AMS at 617-227-2425 or amspubs@ametsoc.org. Permission to place a copy of this work on this server has been provided by the AMS. The AMS does not guarantee that the copy provided here is an accurate copy of the published work. |
op_doi |
https://doi.org/10.1175/2010MWR3371.1 |
container_title |
Monthly Weather Review |
container_volume |
138 |
container_issue |
10 |
container_start_page |
3840 |
op_container_end_page |
3857 |
_version_ |
1772811858534727680 |