Spatial variability of Antarctic Bottom Water in the Australian Antarctic Basin from 2018–2020 captured by Deep Argo
There are two varieties of Antarctic Bottom Water present in the Australian Antarctic Basin (AAB): locally produced Adélie Land Bottom Water (ALBW) and distantly produced Ross Sea Bottom Water (RSBW). Between 2014 and 2018, RSBW has rebounded from a multidecade freshening trend. The return of the sa...
Published in: | Geophysical Research Letters |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Amer Geophysical Union
2020
|
Subjects: | |
Online Access: | https://eprints.utas.edu.au/37239/ https://eprints.utas.edu.au/37239/1/145252%20-%20Spatial%20variability%20of%20Antarctic%20Bottom%20Water.pdf |
id |
ftunivtasmania:oai:eprints.utas.edu.au:37239 |
---|---|
record_format |
openpolar |
spelling |
ftunivtasmania:oai:eprints.utas.edu.au:37239 2023-05-15T13:31:53+02:00 Spatial variability of Antarctic Bottom Water in the Australian Antarctic Basin from 2018–2020 captured by Deep Argo Thomas, G Purkey, SG Roemmich, D Foppert, A Rintoul, SR 2020 application/pdf https://eprints.utas.edu.au/37239/ https://eprints.utas.edu.au/37239/1/145252%20-%20Spatial%20variability%20of%20Antarctic%20Bottom%20Water.pdf en eng Amer Geophysical Union https://eprints.utas.edu.au/37239/1/145252%20-%20Spatial%20variability%20of%20Antarctic%20Bottom%20Water.pdf Thomas, G, Purkey, SG, Roemmich, D, Foppert, A orcid:0000-0003-2958-1454 and Rintoul, SR orcid:0000-0002-7055-9876 2020 , 'Spatial variability of Antarctic Bottom Water in the Australian Antarctic Basin from 2018–2020 captured by Deep Argo' , Geophysical Research Letters, vol. 47, no. 23 , pp. 1-9 , doi:10.1029/2020GL089467 <http://dx.doi.org/10.1029/2020GL089467>. Southern Ocean Antarctic Bottom Water overturning circulation Article PeerReviewed 2020 ftunivtasmania https://doi.org/10.1029/2020GL089467 2021-09-13T22:20:41Z There are two varieties of Antarctic Bottom Water present in the Australian Antarctic Basin (AAB): locally produced Adélie Land Bottom Water (ALBW) and distantly produced Ross Sea Bottom Water (RSBW). Between 2014 and 2018, RSBW has rebounded from a multidecade freshening trend. The return of the salty RSBW to the AAB is revealed by six Deep Argo floats that have occupied the region from January of 2018 to March of 2020. The floats depict a zonal variation in temperature and salinity in the bottom waters of the AAB, driven by the inflow of RSBW. A simple Optimum Multiparameter Analysis based on potential temperature and salinity gives a sense of scale to the composition of the bottom waters, which are nearly 80% of the new, salty RSBW in the south-east corner of the basin by 2019 and generally less than 40% to the west closer to the ALBW outflow region and the abyssal plain. Article in Journal/Newspaper Antarc* Antarctic Ross Sea Southern Ocean University of Tasmania: UTas ePrints Antarctic Australian Antarctic Basin ENVELOPE(120.000,120.000,-60.000,-60.000) Australian-Antarctic Basin ENVELOPE(134.115,134.115,-58.800,-58.800) Ross Sea Southern Ocean Geophysical Research Letters 47 23 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
Southern Ocean Antarctic Bottom Water overturning circulation |
spellingShingle |
Southern Ocean Antarctic Bottom Water overturning circulation Thomas, G Purkey, SG Roemmich, D Foppert, A Rintoul, SR Spatial variability of Antarctic Bottom Water in the Australian Antarctic Basin from 2018–2020 captured by Deep Argo |
topic_facet |
Southern Ocean Antarctic Bottom Water overturning circulation |
description |
There are two varieties of Antarctic Bottom Water present in the Australian Antarctic Basin (AAB): locally produced Adélie Land Bottom Water (ALBW) and distantly produced Ross Sea Bottom Water (RSBW). Between 2014 and 2018, RSBW has rebounded from a multidecade freshening trend. The return of the salty RSBW to the AAB is revealed by six Deep Argo floats that have occupied the region from January of 2018 to March of 2020. The floats depict a zonal variation in temperature and salinity in the bottom waters of the AAB, driven by the inflow of RSBW. A simple Optimum Multiparameter Analysis based on potential temperature and salinity gives a sense of scale to the composition of the bottom waters, which are nearly 80% of the new, salty RSBW in the south-east corner of the basin by 2019 and generally less than 40% to the west closer to the ALBW outflow region and the abyssal plain. |
format |
Article in Journal/Newspaper |
author |
Thomas, G Purkey, SG Roemmich, D Foppert, A Rintoul, SR |
author_facet |
Thomas, G Purkey, SG Roemmich, D Foppert, A Rintoul, SR |
author_sort |
Thomas, G |
title |
Spatial variability of Antarctic Bottom Water in the Australian Antarctic Basin from 2018–2020 captured by Deep Argo |
title_short |
Spatial variability of Antarctic Bottom Water in the Australian Antarctic Basin from 2018–2020 captured by Deep Argo |
title_full |
Spatial variability of Antarctic Bottom Water in the Australian Antarctic Basin from 2018–2020 captured by Deep Argo |
title_fullStr |
Spatial variability of Antarctic Bottom Water in the Australian Antarctic Basin from 2018–2020 captured by Deep Argo |
title_full_unstemmed |
Spatial variability of Antarctic Bottom Water in the Australian Antarctic Basin from 2018–2020 captured by Deep Argo |
title_sort |
spatial variability of antarctic bottom water in the australian antarctic basin from 2018–2020 captured by deep argo |
publisher |
Amer Geophysical Union |
publishDate |
2020 |
url |
https://eprints.utas.edu.au/37239/ https://eprints.utas.edu.au/37239/1/145252%20-%20Spatial%20variability%20of%20Antarctic%20Bottom%20Water.pdf |
long_lat |
ENVELOPE(120.000,120.000,-60.000,-60.000) ENVELOPE(134.115,134.115,-58.800,-58.800) |
geographic |
Antarctic Australian Antarctic Basin Australian-Antarctic Basin Ross Sea Southern Ocean |
geographic_facet |
Antarctic Australian Antarctic Basin Australian-Antarctic Basin Ross Sea Southern Ocean |
genre |
Antarc* Antarctic Ross Sea Southern Ocean |
genre_facet |
Antarc* Antarctic Ross Sea Southern Ocean |
op_relation |
https://eprints.utas.edu.au/37239/1/145252%20-%20Spatial%20variability%20of%20Antarctic%20Bottom%20Water.pdf Thomas, G, Purkey, SG, Roemmich, D, Foppert, A orcid:0000-0003-2958-1454 and Rintoul, SR orcid:0000-0002-7055-9876 2020 , 'Spatial variability of Antarctic Bottom Water in the Australian Antarctic Basin from 2018–2020 captured by Deep Argo' , Geophysical Research Letters, vol. 47, no. 23 , pp. 1-9 , doi:10.1029/2020GL089467 <http://dx.doi.org/10.1029/2020GL089467>. |
op_doi |
https://doi.org/10.1029/2020GL089467 |
container_title |
Geophysical Research Letters |
container_volume |
47 |
container_issue |
23 |
_version_ |
1766021970362630144 |