A continental shelf pump for CO2 on the Adelie land coast, East Antarctica
We quantify the transport of inorganic carbon from the continental shelf to the deep ocean in Dense Shelf Water (DSW) from the Mertz and Ninnis Polynyas along the Adélie Land coast in East Antarctica. For this purpose, observations of total dissolved inorganic carbon (TCO2) from two summer hydrograp...
Published in: | Journal of Geophysical Research: Oceans |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley-Blackwell Publishing Inc.
2020
|
Subjects: | |
Online Access: | https://eprints.utas.edu.au/46852/ https://eprints.utas.edu.au/46852/1/151322%20-%20A%20continental%20shelf%20pump%20for%20CO2%20on%20the%20Adelie%20land%20coast.pdf |
id |
ftunivtasmania:oai:eprints.utas.edu.au:46852 |
---|---|
record_format |
openpolar |
spelling |
ftunivtasmania:oai:eprints.utas.edu.au:46852 2023-05-15T13:04:18+02:00 A continental shelf pump for CO2 on the Adelie land coast, East Antarctica Arroyo, MC Shadwick, EH Tilbrook, B Rintoul, SR Kusahara, K 2020 application/pdf https://eprints.utas.edu.au/46852/ https://eprints.utas.edu.au/46852/1/151322%20-%20A%20continental%20shelf%20pump%20for%20CO2%20on%20the%20Adelie%20land%20coast.pdf en eng Wiley-Blackwell Publishing Inc. https://eprints.utas.edu.au/46852/1/151322%20-%20A%20continental%20shelf%20pump%20for%20CO2%20on%20the%20Adelie%20land%20coast.pdf Arroyo, MC, Shadwick, EH, Tilbrook, B, Rintoul, SR orcid:0000-0002-7055-9876 and Kusahara, K 2020 , 'A continental shelf pump for CO2 on the Adelie land coast, East Antarctica' , Journal of Geophysical Research: Oceans, vol. 125, no. 10 , pp. 1-22 , doi:10.1029/2020JC016302 <http://dx.doi.org/10.1029/2020JC016302>. carbon export dense shelf water Mertz Polynya Article PeerReviewed 2020 ftunivtasmania https://doi.org/10.1029/2020JC016302 2022-08-22T22:16:41Z We quantify the transport of inorganic carbon from the continental shelf to the deep ocean in Dense Shelf Water (DSW) from the Mertz and Ninnis Polynyas along the Adélie Land coast in East Antarctica. For this purpose, observations of total dissolved inorganic carbon (TCO2) from two summer hydrographic surveys in 2015 and 2017 were paired with DSW volume transport estimates derived from a coupled ocean-sea ice-ice shelf model to examine the fate of inorganic carbon in DSW from Adélie Land. Transports indicate a net outflow of 227 ± 115 Tg C yr−1 with DSW in the postglacial calving configuration of the Mertz Polynya. The greatest outflow of inorganic carbon from the shelf region was delivered through the northern boundary across the Adélie and Mertz Sills, with an additional transport westward from the Mertz Polynya. Inorganic carbon in DSW is derived primarily from inflowing TCO2-rich modified Circumpolar Deep Water; local processes (biological productivity, air-sea exchange of CO2, and the addition of brine during sea ice formation) make much smaller contributions. This study proposes that DSW export serves as a continental shelf pump for CO2 and is a pathway to sequester inorganic carbon from the shallow Antarctic continental shelf to the abyssal ocean, removing CO2 from atmospheric exchange on the time scale of centuries. Article in Journal/Newspaper Adelie Land Antarc* Antarctic Antarctica Antarctica Journal East Antarctica Ice Shelf Sea ice University of Tasmania: UTas ePrints Antarctic East Antarctica Journal of Geophysical Research: Oceans 125 10 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
carbon export dense shelf water Mertz Polynya |
spellingShingle |
carbon export dense shelf water Mertz Polynya Arroyo, MC Shadwick, EH Tilbrook, B Rintoul, SR Kusahara, K A continental shelf pump for CO2 on the Adelie land coast, East Antarctica |
topic_facet |
carbon export dense shelf water Mertz Polynya |
description |
We quantify the transport of inorganic carbon from the continental shelf to the deep ocean in Dense Shelf Water (DSW) from the Mertz and Ninnis Polynyas along the Adélie Land coast in East Antarctica. For this purpose, observations of total dissolved inorganic carbon (TCO2) from two summer hydrographic surveys in 2015 and 2017 were paired with DSW volume transport estimates derived from a coupled ocean-sea ice-ice shelf model to examine the fate of inorganic carbon in DSW from Adélie Land. Transports indicate a net outflow of 227 ± 115 Tg C yr−1 with DSW in the postglacial calving configuration of the Mertz Polynya. The greatest outflow of inorganic carbon from the shelf region was delivered through the northern boundary across the Adélie and Mertz Sills, with an additional transport westward from the Mertz Polynya. Inorganic carbon in DSW is derived primarily from inflowing TCO2-rich modified Circumpolar Deep Water; local processes (biological productivity, air-sea exchange of CO2, and the addition of brine during sea ice formation) make much smaller contributions. This study proposes that DSW export serves as a continental shelf pump for CO2 and is a pathway to sequester inorganic carbon from the shallow Antarctic continental shelf to the abyssal ocean, removing CO2 from atmospheric exchange on the time scale of centuries. |
format |
Article in Journal/Newspaper |
author |
Arroyo, MC Shadwick, EH Tilbrook, B Rintoul, SR Kusahara, K |
author_facet |
Arroyo, MC Shadwick, EH Tilbrook, B Rintoul, SR Kusahara, K |
author_sort |
Arroyo, MC |
title |
A continental shelf pump for CO2 on the Adelie land coast, East Antarctica |
title_short |
A continental shelf pump for CO2 on the Adelie land coast, East Antarctica |
title_full |
A continental shelf pump for CO2 on the Adelie land coast, East Antarctica |
title_fullStr |
A continental shelf pump for CO2 on the Adelie land coast, East Antarctica |
title_full_unstemmed |
A continental shelf pump for CO2 on the Adelie land coast, East Antarctica |
title_sort |
continental shelf pump for co2 on the adelie land coast, east antarctica |
publisher |
Wiley-Blackwell Publishing Inc. |
publishDate |
2020 |
url |
https://eprints.utas.edu.au/46852/ https://eprints.utas.edu.au/46852/1/151322%20-%20A%20continental%20shelf%20pump%20for%20CO2%20on%20the%20Adelie%20land%20coast.pdf |
geographic |
Antarctic East Antarctica |
geographic_facet |
Antarctic East Antarctica |
genre |
Adelie Land Antarc* Antarctic Antarctica Antarctica Journal East Antarctica Ice Shelf Sea ice |
genre_facet |
Adelie Land Antarc* Antarctic Antarctica Antarctica Journal East Antarctica Ice Shelf Sea ice |
op_relation |
https://eprints.utas.edu.au/46852/1/151322%20-%20A%20continental%20shelf%20pump%20for%20CO2%20on%20the%20Adelie%20land%20coast.pdf Arroyo, MC, Shadwick, EH, Tilbrook, B, Rintoul, SR orcid:0000-0002-7055-9876 and Kusahara, K 2020 , 'A continental shelf pump for CO2 on the Adelie land coast, East Antarctica' , Journal of Geophysical Research: Oceans, vol. 125, no. 10 , pp. 1-22 , doi:10.1029/2020JC016302 <http://dx.doi.org/10.1029/2020JC016302>. |
op_doi |
https://doi.org/10.1029/2020JC016302 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
125 |
container_issue |
10 |
_version_ |
1766356636831580160 |