Spatial and temporal variability of the physical, carbonate and CO2 properties in the Southern Ocean surface waters during austral summer (2005-2019)
In situ measurements of sea surface temperature (SST), salinity (SSS), Total Alkalinity (AT) and Total Carbon (CT) were obtained during austral summer (mid-February to mid-March) from 2005 to 2019 in the Southern Ocean (SO), along a transect between Hobart, Tasmania and Dumont d’Urville French Antar...
Published in: | Deep Sea Research Part I: Oceanographic Research Papers |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Elsevier BV
2022
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Online Access: | https://archimer.ifremer.fr/doc/00788/89965/95480.pdf https://archimer.ifremer.fr/doc/00788/89965/95481.docx https://doi.org/10.1016/j.dsr.2022.103836 https://archimer.ifremer.fr/doc/00788/89965/ |
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ftarchimer:oai:archimer.ifremer.fr:89965 2023-05-15T13:47:37+02:00 Spatial and temporal variability of the physical, carbonate and CO2 properties in the Southern Ocean surface waters during austral summer (2005-2019) Brandon, Margaux Goyet, Catherine Touratier, Franck Lefèvre, Nathalie Kestenare, Elodie Morrow, Rosemary 2022-09 application/pdf https://archimer.ifremer.fr/doc/00788/89965/95480.pdf https://archimer.ifremer.fr/doc/00788/89965/95481.docx https://doi.org/10.1016/j.dsr.2022.103836 https://archimer.ifremer.fr/doc/00788/89965/ eng eng Elsevier BV info:eu-repo/grantAgreement/EC/FP7/633211/EU//AtlantOS https://archimer.ifremer.fr/doc/00788/89965/95480.pdf https://archimer.ifremer.fr/doc/00788/89965/95481.docx doi:10.1016/j.dsr.2022.103836 https://archimer.ifremer.fr/doc/00788/89965/ info:eu-repo/semantics/openAccess restricted use Deep-sea Research Part I-oceanographic Research Papers (0967-0637) (Elsevier BV), 2022-09 , Vol. 187 , P. 103836 (14p.) Southern ocean Sea surface temperature and salinity Carbonate system Air-sea CO 2 flux Spatial variability Temporal variability text Publication info:eu-repo/semantics/article 2022 ftarchimer https://doi.org/10.1016/j.dsr.2022.103836 2023-03-14T23:55:22Z In situ measurements of sea surface temperature (SST), salinity (SSS), Total Alkalinity (AT) and Total Carbon (CT) were obtained during austral summer (mid-February to mid-March) from 2005 to 2019 in the Southern Ocean (SO), along a transect between Hobart, Tasmania and Dumont d’Urville French Antarctic Station. The studied transect is divided in four regions from North to South: the Subtropical Zone (STZ), the Subantarctic Region (SAR), the Antarctic Region (AAR) and the Coastal Antarctic Zone (CAZ). Latitudinal distribution of measured SST, SSS, AT, CT as well as calculated pH, CO2 parameters (seawater fugacity of CO2 (fCO2sw), difference between seawater and atmospheric fCO2 (ΔfCO2), CO2 flux (FCO2)) and satellite-derived Chlorophyll a (Chl-a) are discussed. We show that the variability of physical and carbonate parameters in the STZ and north of the SAR are related to the mesoscale activity. In the CAZ, the freshwater inputs from sea-ice melting strongly impact the variability of all parameters. The comparison between physical and carbonate parameters highlights that AT and CT are directly related to the latitudinal variability of SST and SSS. Study of the CO2 parameters shows that the transect is a sink of CO2 during February and March, with a mean FCO2 of −4.0 ± 2.8 mmol m−2 d−1. The most negative values of FCO2 are found in the STZ and SAR north of 50°S and in the AAR south of 62°S, where biological activity is high. New simple empirical relationships are developed for AT from SST and SSS and for CT using SST, SSS and atmospheric fCO2 (fCO2atm) for the austral summer in the studied area. Using high resolution SSS and SST from the SURVOSTRAL program, trends of AT and CT are determined in the SAR and the AAR from 2005 to 2019. SST, SSS and AT increase over this period in the SAR, which might be explained by the southward migration of the Subtropical Front. In the AAR, no clear trend is detected. CT increases by 1.0 ± 0.2 and 0.8 ± 0.3 μmol kg−1 yr−1 in the SAR and AAR respectively. The trend in the AAR is ... Article in Journal/Newspaper Antarc* Antarctic Sea ice Southern Ocean Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Antarctic Austral Dumont d’Urville ENVELOPE(140.000,140.000,-66.667,-66.667) Southern Ocean The Antarctic Deep Sea Research Part I: Oceanographic Research Papers 187 103836 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Southern ocean Sea surface temperature and salinity Carbonate system Air-sea CO 2 flux Spatial variability Temporal variability |
spellingShingle |
Southern ocean Sea surface temperature and salinity Carbonate system Air-sea CO 2 flux Spatial variability Temporal variability Brandon, Margaux Goyet, Catherine Touratier, Franck Lefèvre, Nathalie Kestenare, Elodie Morrow, Rosemary Spatial and temporal variability of the physical, carbonate and CO2 properties in the Southern Ocean surface waters during austral summer (2005-2019) |
topic_facet |
Southern ocean Sea surface temperature and salinity Carbonate system Air-sea CO 2 flux Spatial variability Temporal variability |
description |
In situ measurements of sea surface temperature (SST), salinity (SSS), Total Alkalinity (AT) and Total Carbon (CT) were obtained during austral summer (mid-February to mid-March) from 2005 to 2019 in the Southern Ocean (SO), along a transect between Hobart, Tasmania and Dumont d’Urville French Antarctic Station. The studied transect is divided in four regions from North to South: the Subtropical Zone (STZ), the Subantarctic Region (SAR), the Antarctic Region (AAR) and the Coastal Antarctic Zone (CAZ). Latitudinal distribution of measured SST, SSS, AT, CT as well as calculated pH, CO2 parameters (seawater fugacity of CO2 (fCO2sw), difference between seawater and atmospheric fCO2 (ΔfCO2), CO2 flux (FCO2)) and satellite-derived Chlorophyll a (Chl-a) are discussed. We show that the variability of physical and carbonate parameters in the STZ and north of the SAR are related to the mesoscale activity. In the CAZ, the freshwater inputs from sea-ice melting strongly impact the variability of all parameters. The comparison between physical and carbonate parameters highlights that AT and CT are directly related to the latitudinal variability of SST and SSS. Study of the CO2 parameters shows that the transect is a sink of CO2 during February and March, with a mean FCO2 of −4.0 ± 2.8 mmol m−2 d−1. The most negative values of FCO2 are found in the STZ and SAR north of 50°S and in the AAR south of 62°S, where biological activity is high. New simple empirical relationships are developed for AT from SST and SSS and for CT using SST, SSS and atmospheric fCO2 (fCO2atm) for the austral summer in the studied area. Using high resolution SSS and SST from the SURVOSTRAL program, trends of AT and CT are determined in the SAR and the AAR from 2005 to 2019. SST, SSS and AT increase over this period in the SAR, which might be explained by the southward migration of the Subtropical Front. In the AAR, no clear trend is detected. CT increases by 1.0 ± 0.2 and 0.8 ± 0.3 μmol kg−1 yr−1 in the SAR and AAR respectively. The trend in the AAR is ... |
format |
Article in Journal/Newspaper |
author |
Brandon, Margaux Goyet, Catherine Touratier, Franck Lefèvre, Nathalie Kestenare, Elodie Morrow, Rosemary |
author_facet |
Brandon, Margaux Goyet, Catherine Touratier, Franck Lefèvre, Nathalie Kestenare, Elodie Morrow, Rosemary |
author_sort |
Brandon, Margaux |
title |
Spatial and temporal variability of the physical, carbonate and CO2 properties in the Southern Ocean surface waters during austral summer (2005-2019) |
title_short |
Spatial and temporal variability of the physical, carbonate and CO2 properties in the Southern Ocean surface waters during austral summer (2005-2019) |
title_full |
Spatial and temporal variability of the physical, carbonate and CO2 properties in the Southern Ocean surface waters during austral summer (2005-2019) |
title_fullStr |
Spatial and temporal variability of the physical, carbonate and CO2 properties in the Southern Ocean surface waters during austral summer (2005-2019) |
title_full_unstemmed |
Spatial and temporal variability of the physical, carbonate and CO2 properties in the Southern Ocean surface waters during austral summer (2005-2019) |
title_sort |
spatial and temporal variability of the physical, carbonate and co2 properties in the southern ocean surface waters during austral summer (2005-2019) |
publisher |
Elsevier BV |
publishDate |
2022 |
url |
https://archimer.ifremer.fr/doc/00788/89965/95480.pdf https://archimer.ifremer.fr/doc/00788/89965/95481.docx https://doi.org/10.1016/j.dsr.2022.103836 https://archimer.ifremer.fr/doc/00788/89965/ |
long_lat |
ENVELOPE(140.000,140.000,-66.667,-66.667) |
geographic |
Antarctic Austral Dumont d’Urville Southern Ocean The Antarctic |
geographic_facet |
Antarctic Austral Dumont d’Urville Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean |
op_source |
Deep-sea Research Part I-oceanographic Research Papers (0967-0637) (Elsevier BV), 2022-09 , Vol. 187 , P. 103836 (14p.) |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/633211/EU//AtlantOS https://archimer.ifremer.fr/doc/00788/89965/95480.pdf https://archimer.ifremer.fr/doc/00788/89965/95481.docx doi:10.1016/j.dsr.2022.103836 https://archimer.ifremer.fr/doc/00788/89965/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1016/j.dsr.2022.103836 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
187 |
container_start_page |
103836 |
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1766247544590958592 |