A twentieth century perspective on summer Antarctic pressure change and variability and contributions from tropical SSTs and ozone depletion
During the late twentieth century, the Antarctic atmospheric circulation has changed and significantly influenced the overall Antarctic climate, through processes including a poleward shift of the circumpolar westerlies. However, little is known about the full spatial pattern of atmospheric pressure...
Published in: | Geophysical Research Letters |
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Language: | English |
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2017
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Online Access: | https://doi.org/10.1002/2017GL075079 |
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ftncar:oai:drupal-site.org:articles_21150 2023-09-05T13:12:30+02:00 A twentieth century perspective on summer Antarctic pressure change and variability and contributions from tropical SSTs and ozone depletion Fogt, Ryan L. (author) Goergens, Chad A. (author) Jones, Julie M. (author) Schneider, David P. (author) Nicolas, Julien P. (author) Bromwich, David H. (author) Dusselier, Hallie E. (author) 2017-10-06 https://doi.org/10.1002/2017GL075079 en eng Geophysical Research Letters--Geophys. Res. Lett.--00948276 articles:21150 ark:/85065/d7ns0xgd doi:10.1002/2017GL075079 Copyright 2017 American Chemical Society. article Text 2017 ftncar https://doi.org/10.1002/2017GL075079 2023-08-14T18:48:58Z During the late twentieth century, the Antarctic atmospheric circulation has changed and significantly influenced the overall Antarctic climate, through processes including a poleward shift of the circumpolar westerlies. However, little is known about the full spatial pattern of atmospheric pressure over the Antarctic continent prior to 1979. Here we investigate surface pressure changes across the entire Antarctic continent back to 1905 by developing a new summer pressure reconstruction poleward of 60 degrees S. We find that only across East Antarctica are the recent pressures significantly lower than pressures in the early twentieth century; we also discern periods of significant positive pressure trends in the early twentieth century across the coastal South Atlantic sector of Antarctica. Climate model simulations reveal that both tropical sea surface temperature variability and other radiative forcing mechanisms, in addition to ozone depletion, have played an important role in forcing the recent observed negative trends. PLR-1341527 Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Antarctic East Antarctica The Antarctic Geophysical Research Letters 44 19 9918 9927 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
During the late twentieth century, the Antarctic atmospheric circulation has changed and significantly influenced the overall Antarctic climate, through processes including a poleward shift of the circumpolar westerlies. However, little is known about the full spatial pattern of atmospheric pressure over the Antarctic continent prior to 1979. Here we investigate surface pressure changes across the entire Antarctic continent back to 1905 by developing a new summer pressure reconstruction poleward of 60 degrees S. We find that only across East Antarctica are the recent pressures significantly lower than pressures in the early twentieth century; we also discern periods of significant positive pressure trends in the early twentieth century across the coastal South Atlantic sector of Antarctica. Climate model simulations reveal that both tropical sea surface temperature variability and other radiative forcing mechanisms, in addition to ozone depletion, have played an important role in forcing the recent observed negative trends. PLR-1341527 |
author2 |
Fogt, Ryan L. (author) Goergens, Chad A. (author) Jones, Julie M. (author) Schneider, David P. (author) Nicolas, Julien P. (author) Bromwich, David H. (author) Dusselier, Hallie E. (author) |
format |
Article in Journal/Newspaper |
title |
A twentieth century perspective on summer Antarctic pressure change and variability and contributions from tropical SSTs and ozone depletion |
spellingShingle |
A twentieth century perspective on summer Antarctic pressure change and variability and contributions from tropical SSTs and ozone depletion |
title_short |
A twentieth century perspective on summer Antarctic pressure change and variability and contributions from tropical SSTs and ozone depletion |
title_full |
A twentieth century perspective on summer Antarctic pressure change and variability and contributions from tropical SSTs and ozone depletion |
title_fullStr |
A twentieth century perspective on summer Antarctic pressure change and variability and contributions from tropical SSTs and ozone depletion |
title_full_unstemmed |
A twentieth century perspective on summer Antarctic pressure change and variability and contributions from tropical SSTs and ozone depletion |
title_sort |
twentieth century perspective on summer antarctic pressure change and variability and contributions from tropical ssts and ozone depletion |
publishDate |
2017 |
url |
https://doi.org/10.1002/2017GL075079 |
geographic |
Antarctic East Antarctica The Antarctic |
geographic_facet |
Antarctic East Antarctica The Antarctic |
genre |
Antarc* Antarctic Antarctica East Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica |
op_relation |
Geophysical Research Letters--Geophys. Res. Lett.--00948276 articles:21150 ark:/85065/d7ns0xgd doi:10.1002/2017GL075079 |
op_rights |
Copyright 2017 American Chemical Society. |
op_doi |
https://doi.org/10.1002/2017GL075079 |
container_title |
Geophysical Research Letters |
container_volume |
44 |
container_issue |
19 |
container_start_page |
9918 |
op_container_end_page |
9927 |
_version_ |
1776200545271283712 |