Anthropogenic temperature and salinity changes in the Southern Ocean
In this study, we compare observed Southern Ocean temperature and salinity changes with the historical simulations from 13 models the Coupled Model Intercomparison Project version 5 (CMIP5), using an optimal fingerprinting framework. We show that there is an unequivocal greenhouse gas-forced warming...
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ftunivtasecite:oai:ecite.utas.edu.au:141607 2023-05-15T13:42:40+02:00 Anthropogenic temperature and salinity changes in the Southern Ocean Hobbs, WR Roach, C Roy, T Sallee, J-B Bindoff, N 2020 https://doi.org/10.1175/JCLI-D-20-0454.1 http://ecite.utas.edu.au/141607 en eng Amer Meteorological Soc http://dx.doi.org/10.1175/JCLI-D-20-0454.1 Hobbs, WR and Roach, C and Roy, T and Sallee, J-B and Bindoff, N, Anthropogenic temperature and salinity changes in the Southern Ocean, Journal of Climate, 34, (1) pp. 215-228. ISSN 0894-8755 (2020) [Refereed Article] http://ecite.utas.edu.au/141607 Earth Sciences Oceanography Physical oceanography Refereed Article PeerReviewed 2020 ftunivtasecite https://doi.org/10.1175/JCLI-D-20-0454.1 2022-08-29T22:18:09Z In this study, we compare observed Southern Ocean temperature and salinity changes with the historical simulations from 13 models the Coupled Model Intercomparison Project version 5 (CMIP5), using an optimal fingerprinting framework. We show that there is an unequivocal greenhouse gas-forced warming in the Southern Ocean. This warming is strongest in the Sub-Antarctic Mode Waters, but is also detectable in denser watermasses which has not been shown in previous studies. We also find greenhouse gas-forced salinity changes, most notably a freshening of Antarctic Intermediate Waters. Our analysis also shows that non-greenhouse gas anthropogenic forcings - anthropogenic aerosols and stratospheric ozone depletion have played an important role in mitigating the Southern Oceans warming. However, the detectability of these responses using optimal fingerprinting is model-dependent, and this result is therefore not as robust as for the greenhouse gas response. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean eCite UTAS (University of Tasmania) Antarctic Southern Ocean Journal of Climate 34 1 215 228 |
institution |
Open Polar |
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eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Oceanography Physical oceanography |
spellingShingle |
Earth Sciences Oceanography Physical oceanography Hobbs, WR Roach, C Roy, T Sallee, J-B Bindoff, N Anthropogenic temperature and salinity changes in the Southern Ocean |
topic_facet |
Earth Sciences Oceanography Physical oceanography |
description |
In this study, we compare observed Southern Ocean temperature and salinity changes with the historical simulations from 13 models the Coupled Model Intercomparison Project version 5 (CMIP5), using an optimal fingerprinting framework. We show that there is an unequivocal greenhouse gas-forced warming in the Southern Ocean. This warming is strongest in the Sub-Antarctic Mode Waters, but is also detectable in denser watermasses which has not been shown in previous studies. We also find greenhouse gas-forced salinity changes, most notably a freshening of Antarctic Intermediate Waters. Our analysis also shows that non-greenhouse gas anthropogenic forcings - anthropogenic aerosols and stratospheric ozone depletion have played an important role in mitigating the Southern Oceans warming. However, the detectability of these responses using optimal fingerprinting is model-dependent, and this result is therefore not as robust as for the greenhouse gas response. |
format |
Article in Journal/Newspaper |
author |
Hobbs, WR Roach, C Roy, T Sallee, J-B Bindoff, N |
author_facet |
Hobbs, WR Roach, C Roy, T Sallee, J-B Bindoff, N |
author_sort |
Hobbs, WR |
title |
Anthropogenic temperature and salinity changes in the Southern Ocean |
title_short |
Anthropogenic temperature and salinity changes in the Southern Ocean |
title_full |
Anthropogenic temperature and salinity changes in the Southern Ocean |
title_fullStr |
Anthropogenic temperature and salinity changes in the Southern Ocean |
title_full_unstemmed |
Anthropogenic temperature and salinity changes in the Southern Ocean |
title_sort |
anthropogenic temperature and salinity changes in the southern ocean |
publisher |
Amer Meteorological Soc |
publishDate |
2020 |
url |
https://doi.org/10.1175/JCLI-D-20-0454.1 http://ecite.utas.edu.au/141607 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
http://dx.doi.org/10.1175/JCLI-D-20-0454.1 Hobbs, WR and Roach, C and Roy, T and Sallee, J-B and Bindoff, N, Anthropogenic temperature and salinity changes in the Southern Ocean, Journal of Climate, 34, (1) pp. 215-228. ISSN 0894-8755 (2020) [Refereed Article] http://ecite.utas.edu.au/141607 |
op_doi |
https://doi.org/10.1175/JCLI-D-20-0454.1 |
container_title |
Journal of Climate |
container_volume |
34 |
container_issue |
1 |
container_start_page |
215 |
op_container_end_page |
228 |
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1766171180520177664 |