The role of the Southern Ocean in the carbon cycle
Metadata record for data from ASAC Project 133\nSee the link below for public details on this project.\n\nSurface carbon dioxide (CO2) observations are integral to understanding the role of the Southern Ocean in the global carbon cycle, and to developing reliable predictions of biogeochemical respon...
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ftands:oai:ands.org.au::1940133 2023-09-05T13:13:48+02:00 The role of the Southern Ocean in the carbon cycle Australian Antarctic Division (isOwnedBy) Spatial: 62.0,-70.0 159.0,-70.0 159.0,-54.0 62.0,-54.0 62.0,-70.0 Spatial: true https://researchdata.edu.au/the-role-southern-carbon-cycle/1940133 http://data.gov.au/dataset/a45dfd40-8e08-44cb-be15-a9cd10947b99 unknown data.gov.au https://researchdata.edu.au/the-role-southern-carbon-cycle/1940133 http://data.gov.au/dataset/a45dfd40-8e08-44cb-be15-a9cd10947b99 the-role-of-the-southern-ocean-in-the-carbon-cycle Australian Antarctic Division AMD CEOS Carbon Ocean acidification SHIPS Southern Ocean dataset ftands 2023-08-14T23:06:00Z Metadata record for data from ASAC Project 133\nSee the link below for public details on this project.\n\nSurface carbon dioxide (CO2) observations are integral to understanding the role of the Southern Ocean in the global carbon cycle, and to developing reliable predictions of biogeochemical responses to altered climatic conditions. Carbon dioxide (CO2) observations made in surface waters of the Australian sector of the Southern Ocean between the years 1991 and 2002 were used to estimate the seasonal variability in the fugacity of CO2 (fCO2) and net air-sea carbon fluxes. The results showed a net annual uptake of CO2 by the surface ocean over the entire region. The greatest seasonal uptake and lowest fCO2 values were observed in Spring/Summer in the sub-Antarctic zone (SAZ: 44 degrees S-50 degrees S) and in the Seasonal Sea-ice Zone (SIZ: south of 62 degrees S). The seasonal maximum in uptake for these regions is consistent with increased phytoplankton biomass and shoaling mixed layers over the Spring/Summer period. The High Nutrient Low Chlorophyll waters between 50 degrees S and 62 degrees S, also had maximum uptake in summer, but less compared to the SAZ and SIZ regions. Winter surface waters were close to or slightly above equilibrium, with respect to atmospheric CO2. The reduced uptake in winter appeared due to deeper mixing, lower biomass, and air-sea CO2 exchange. The highest fCO2 values in Winter were observed under or near the seasonal sea-ice where entrainment of deeper CO2-rich waters and ice cover would maintain high surface fCO2 values. The smallest seasonal amplitude in the surface fCO2 and net air-sea fluxes was found from 51 degrees S to 54 degrees S, a region on the southern edge of the SAZ and between the North sub-Antarctic Front and North Polar Front. The uptake estimates derived from the data were in good agreement with the CO2 flux climatology of Takahashi (2002), except in the SAZ and SIZ where we observed greater and less uptake, respectively.\n\nData for this project are available for ... Dataset Antarc* Antarctic Ocean acidification Sea ice Southern Ocean Research Data Australia (Australian National Data Service - ANDS) Antarctic Southern Ocean |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
AMD CEOS Carbon Ocean acidification SHIPS Southern Ocean |
spellingShingle |
AMD CEOS Carbon Ocean acidification SHIPS Southern Ocean The role of the Southern Ocean in the carbon cycle |
topic_facet |
AMD CEOS Carbon Ocean acidification SHIPS Southern Ocean |
description |
Metadata record for data from ASAC Project 133\nSee the link below for public details on this project.\n\nSurface carbon dioxide (CO2) observations are integral to understanding the role of the Southern Ocean in the global carbon cycle, and to developing reliable predictions of biogeochemical responses to altered climatic conditions. Carbon dioxide (CO2) observations made in surface waters of the Australian sector of the Southern Ocean between the years 1991 and 2002 were used to estimate the seasonal variability in the fugacity of CO2 (fCO2) and net air-sea carbon fluxes. The results showed a net annual uptake of CO2 by the surface ocean over the entire region. The greatest seasonal uptake and lowest fCO2 values were observed in Spring/Summer in the sub-Antarctic zone (SAZ: 44 degrees S-50 degrees S) and in the Seasonal Sea-ice Zone (SIZ: south of 62 degrees S). The seasonal maximum in uptake for these regions is consistent with increased phytoplankton biomass and shoaling mixed layers over the Spring/Summer period. The High Nutrient Low Chlorophyll waters between 50 degrees S and 62 degrees S, also had maximum uptake in summer, but less compared to the SAZ and SIZ regions. Winter surface waters were close to or slightly above equilibrium, with respect to atmospheric CO2. The reduced uptake in winter appeared due to deeper mixing, lower biomass, and air-sea CO2 exchange. The highest fCO2 values in Winter were observed under or near the seasonal sea-ice where entrainment of deeper CO2-rich waters and ice cover would maintain high surface fCO2 values. The smallest seasonal amplitude in the surface fCO2 and net air-sea fluxes was found from 51 degrees S to 54 degrees S, a region on the southern edge of the SAZ and between the North sub-Antarctic Front and North Polar Front. The uptake estimates derived from the data were in good agreement with the CO2 flux climatology of Takahashi (2002), except in the SAZ and SIZ where we observed greater and less uptake, respectively.\n\nData for this project are available for ... |
author2 |
Australian Antarctic Division (isOwnedBy) |
format |
Dataset |
title |
The role of the Southern Ocean in the carbon cycle |
title_short |
The role of the Southern Ocean in the carbon cycle |
title_full |
The role of the Southern Ocean in the carbon cycle |
title_fullStr |
The role of the Southern Ocean in the carbon cycle |
title_full_unstemmed |
The role of the Southern Ocean in the carbon cycle |
title_sort |
role of the southern ocean in the carbon cycle |
publisher |
data.gov.au |
url |
https://researchdata.edu.au/the-role-southern-carbon-cycle/1940133 http://data.gov.au/dataset/a45dfd40-8e08-44cb-be15-a9cd10947b99 |
op_coverage |
Spatial: 62.0,-70.0 159.0,-70.0 159.0,-54.0 62.0,-54.0 62.0,-70.0 Spatial: true |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Ocean acidification Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Ocean acidification Sea ice Southern Ocean |
op_source |
Australian Antarctic Division |
op_relation |
https://researchdata.edu.au/the-role-southern-carbon-cycle/1940133 http://data.gov.au/dataset/a45dfd40-8e08-44cb-be15-a9cd10947b99 the-role-of-the-southern-ocean-in-the-carbon-cycle |
_version_ |
1776204953557139456 |