The role of the Southern Ocean in the carbon cycle
Metadata record for data from ASAC Project 133 See the link below for public details on this project. Surface 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...
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Australian Antarctic Data Centre
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Online Access: | https://researchdata.edu.au/the-role-southern-carbon-cycle/699697 https://data.aad.gov.au/metadata/records/ASAC_133 |
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ftands:oai:ands.org.au::699697 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
biota oceans SURFACE WINDS EARTH SCIENCE ATMOSPHERE ATMOSPHERIC WINDS CARBON OCEAN CHEMISTRY CARBON DIOXIDE SEA SURFACE TEMPERATURE OCEAN TEMPERATURE SALINITY SALINITY/DENSITY EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > ATMOSPHERIC CARBON DIOXIDE NUTRIENT CYCLING BIOSPHERE ECOLOGICAL DYNAMICS ECOSYSTEM FUNCTIONS Southern Ocean Ocean acidification SHIPS OCEAN > GEOGRAPHIC REGION > POLAR |
spellingShingle |
biota oceans SURFACE WINDS EARTH SCIENCE ATMOSPHERE ATMOSPHERIC WINDS CARBON OCEAN CHEMISTRY CARBON DIOXIDE SEA SURFACE TEMPERATURE OCEAN TEMPERATURE SALINITY SALINITY/DENSITY EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > ATMOSPHERIC CARBON DIOXIDE NUTRIENT CYCLING BIOSPHERE ECOLOGICAL DYNAMICS ECOSYSTEM FUNCTIONS Southern Ocean Ocean acidification SHIPS OCEAN > GEOGRAPHIC REGION > POLAR The role of the Southern Ocean in the carbon cycle |
topic_facet |
biota oceans SURFACE WINDS EARTH SCIENCE ATMOSPHERE ATMOSPHERIC WINDS CARBON OCEAN CHEMISTRY CARBON DIOXIDE SEA SURFACE TEMPERATURE OCEAN TEMPERATURE SALINITY SALINITY/DENSITY EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > ATMOSPHERIC CARBON DIOXIDE NUTRIENT CYCLING BIOSPHERE ECOLOGICAL DYNAMICS ECOSYSTEM FUNCTIONS Southern Ocean Ocean acidification SHIPS OCEAN > GEOGRAPHIC REGION > POLAR |
description |
Metadata record for data from ASAC Project 133 See the link below for public details on this project. Surface 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. Data for this project are available for download - the dataset consists of a data files, and some excel files, which provide further information about each data file (cruise, dates, etc). Furthermore, the column headings used in the data files are as follows: Cruise - name of the cruise which collected the data Date - UTC Time - in UTC Latitude - decimal Longitude - decimal Sst - Sea Surface Temperature in degrees C Teq - Temperature of surface water at which the CO2 measurement is made. Sal - Salinity Patm - atmospheric pressure in hectopascals Shipspd - ship speed in knots Windspd - wind speed in knots Winddir - wind direction in degrees xCO2 - Mole fraction of CO2 in air (dry) equilibrated with surface water and at equilibrator water temperature xCO2air - Mole fraction of CO2 in atmosphere, dry pCO2 - partial pressure of carbon dioxide in surface water |
author2 |
TILBROOK, BRONTE (hasPrincipalInvestigator) TILBROOK, BRONTE (processor) CSIRO (originator) Australian Antarctic Data Centre (publisher) |
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 |
Australian Antarctic Data Centre |
url |
https://researchdata.edu.au/the-role-southern-carbon-cycle/699697 https://data.aad.gov.au/metadata/records/ASAC_133 |
op_coverage |
Spatial: northlimit=-54.0; southlimit=-70.0; westlimit=62.0; eastLimit=159.0; projection=WGS84 Temporal: From 1989-09-30 to 1999-03-31 |
long_lat |
ENVELOPE(62.0,159.0,-54.0,-70.0) |
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 Data Centre |
op_relation |
https://researchdata.edu.au/the-role-southern-carbon-cycle/699697 a935b840-9538-4f85-beed-ae0f42cb16fb ASAC_133 https://data.aad.gov.au/metadata/records/ASAC_133 |
_version_ |
1766146838600089600 |
spelling |
ftands:oai:ands.org.au::699697 2023-05-15T13:41:12+02:00 The role of the Southern Ocean in the carbon cycle TILBROOK, BRONTE (hasPrincipalInvestigator) TILBROOK, BRONTE (processor) CSIRO (originator) Australian Antarctic Data Centre (publisher) Spatial: northlimit=-54.0; southlimit=-70.0; westlimit=62.0; eastLimit=159.0; projection=WGS84 Temporal: From 1989-09-30 to 1999-03-31 https://researchdata.edu.au/the-role-southern-carbon-cycle/699697 https://data.aad.gov.au/metadata/records/ASAC_133 unknown Australian Antarctic Data Centre https://researchdata.edu.au/the-role-southern-carbon-cycle/699697 a935b840-9538-4f85-beed-ae0f42cb16fb ASAC_133 https://data.aad.gov.au/metadata/records/ASAC_133 Australian Antarctic Data Centre biota oceans SURFACE WINDS EARTH SCIENCE ATMOSPHERE ATMOSPHERIC WINDS CARBON OCEAN CHEMISTRY CARBON DIOXIDE SEA SURFACE TEMPERATURE OCEAN TEMPERATURE SALINITY SALINITY/DENSITY EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > ATMOSPHERIC CARBON DIOXIDE NUTRIENT CYCLING BIOSPHERE ECOLOGICAL DYNAMICS ECOSYSTEM FUNCTIONS Southern Ocean Ocean acidification SHIPS OCEAN > GEOGRAPHIC REGION > POLAR dataset ftands 2021-12-06T23:22:32Z Metadata record for data from ASAC Project 133 See the link below for public details on this project. Surface 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. Data for this project are available for download - the dataset consists of a data files, and some excel files, which provide further information about each data file (cruise, dates, etc). Furthermore, the column headings used in the data files are as follows: Cruise - name of the cruise which collected the data Date - UTC Time - in UTC Latitude - decimal Longitude - decimal Sst - Sea Surface Temperature in degrees C Teq - Temperature of surface water at which the CO2 measurement is made. Sal - Salinity Patm - atmospheric pressure in hectopascals Shipspd - ship speed in knots Windspd - wind speed in knots Winddir - wind direction in degrees xCO2 - Mole fraction of CO2 in air (dry) equilibrated with surface water and at equilibrator water temperature xCO2air - Mole fraction of CO2 in atmosphere, dry pCO2 - partial pressure of carbon dioxide in surface water Dataset Antarc* Antarctic Ocean acidification Sea ice Southern Ocean Research Data Australia (Australian National Data Service - ANDS) Antarctic Southern Ocean ENVELOPE(62.0,159.0,-54.0,-70.0) |