Data

The carbon cycle in the Australian sector of the Southern Ocean.

Australian Ocean Data Network
Tilbrook, B. ; TILBROOK, BRONTE
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=http://catalogue-aodn.prod.aodn.org.au/geonetwork/srv/eng/search?uuid=ASAC_1302&rft.title=The carbon cycle in the Australian sector of the Southern Ocean.&rft.identifier=http://catalogue-aodn.prod.aodn.org.au/geonetwork/srv/eng/search?uuid=ASAC_1302&rft.publisher=Australian Antarctic Data Centre&rft.description=---- Public Summary from Project ---- The Southern Ocean is one the most significant regions on earth for regulating the build up of anthropogenic CO2 in the atmosphere, and the capacity for carbon uptake in the region could be altered by climate change. The project aims to establish a time series of anthropogenic carbon accumulation. The work will be used to identify processes regulating the CO2 uptake and to test models that predict future uptake. 2001-2002 Season: Data collection for this project was solely carried out on voyage three of the 2001/2002 season. Total dissolved inorganic carbon (TCO2) and titration alkalinity (TA) measurements were made on the CLIVAR SR3 section between Hobart and Antarctica. The carbon samples were taken from a 24 bottle rosette and have an approximate horizontal resolution of 60nm with closer spacing in regions where horizontal gradients were large. Many of the stations sampled for carbon had multiple casts to improve vertical resolution. The CRM analyses were used to calibrate the titration cell volume. Preliminary analysis of Certified Reference Material (CRM) Seawater from Scripps Institution of Oceanography show data quality was generally good. For TCO2 the measurements on Batch 52 CRM's the average concentration was 2005.65 +/- 1.36 micromol/kg (n=65; 1 s.d.). For TA the average CRM values were 2224.76 +/- 1.17 micromol/kg (n=45, 1 s.d.). The certified values for Batch 52 was 2005.57 +/- 0.39 and 2224.72 +/- 0.81 micromol/kg for TCO2 and TA, respectively. The fields in this dataset follow standard WOCE naming practices. See the url given below for further details. The fields in this dataset are: EXPOCODE SECT_ID STNNBR CASTNO SAMPNO BTLNBR BTLNBR_FLAG_W DATE TIME LATITUDE LONGITUDE DEPTH CTDPRS CTDTMP CTDSAL CTDSAL_FLAG_W SALNTY SALNTY_FLAG_W CTDOXY CTDOXY_FLAG_W OXYGEN OXYGEN_FLAG_W SILCAT SILCAT_FLAG_W NITRAT NITRAT_FLAG_W PHSPHT PHSPHT_FLAG_W CFC-11 CFC-11_FLAG_W CFC-12 CFC-12_FLAG_W CFC113 CFC113_FLAG_W CCL4 CCL4_FLAG_W TCARBN TCARBN_FLAG_W ALKALI ALKALI_FLAG_W 2008-2009 Season: The Southern Ocean is a critical region on earth for taking up anthropogenic carbon dioxide (CO2) from the atmosphere. Over the past year, underway equipment has been used on a number of Aurora Australis voyages to estimate the air-sea exchange of CO2 and to characterise the variability in the exchange. The information is part of a large long term international effort to determine how much CO2 is being taken up by the ocean and to improve predictions of how the uptake and CO2 storage will change in future. An underway CO2 system was run on a number of voyages on Aurora Australis.Data are quality controlled following WOCE guidelines. Flags are included with these data (good=2, bad =4, suspicious =3) and are preliminary. 2008-2009 Season: Plans to install an aerosol sampler have been delayed because the equipment needed to be redesigned to handle Southern Ocean conditions, and there are difficulties getting people to operate the equipment on voyages. It is not certain this part of the project will be possible in 2009/2010. Underway CO2 measurements were made during transits on Aurora Australis voyages, V1, V2(return), V3, and V5. Difficulties affecting project: The aerosol sampler needed to be redesigned to handle the conditions. Particulate contamination from stack gas is also a concern for the aerosol sampling. Flooding of the oceanographic lab due to poor drainage is an ongoing problem and is causing loss of data. A problem with the ship's thermosalinograph when operated in the ice was identified a couple of years ago and is still not corrected, degrading the data quality. Cavitation in the seawater pump is also a problem that will degrade data quality for oxygen and perhaps CO2. While the problem persists it is unlikely oxygen measurements will be of much value on the ship. The underway equipment is usually run by volunteers. The work is not arduous and requires about 20 minutes per day when the ship is underway. The Deputy Voyage Leaders often volunteer, but they are not always available. Organising volunteers and difficulty finding them has resulted in us needing to leave the systems off at times.&rft.creator=Tilbrook, B. &rft.creator=TILBROOK, BRONTE &rft.date=2001&rft.coverage=northlimit=-44.0; southlimit=-67.0; westlimit=139.75; eastLimit=146.0&rft.coverage=northlimit=-44.0; southlimit=-67.0; westlimit=139.75; eastLimit=146.0&rft_rights=Attribution 4.0 International (CC BY 4.0)&rft_rights= https://creativecommons.org/licenses/by/4.0/legalcode&rft_subject=geoscientificInformation&rft_subject=oceans&rft_subject=CARBON&rft_subject=EARTH SCIENCE&rft_subject=OCEANS&rft_subject=OCEAN CHEMISTRY&rft_subject=CARBON DIOXIDE&rft_subject=EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > ATMOSPHERIC CARBON DIOXIDE&rft_subject=ALKALI&rft_subject=ALKALI_FLAG_W&rft_subject=BTLNBR&rft_subject=BTLNBR_FLAG_W&rft_subject=CASTNO&rft_subject=CCL4&rft_subject=CCL4_FLAG_W&rft_subject=CFC-11&rft_subject=CFC-11_FLAG_W&rft_subject=CFC-12&rft_subject=CFC-12_FLAG_W&rft_subject=CFC113&rft_subject=CFC113_FLAG_W&rft_subject=CTDOXY&rft_subject=CTDOXY_FLAG_W&rft_subject=CTDPRS&rft_subject=CTDSAL&rft_subject=CTDSAL_FLAG_W&rft_subject=CTDTMP&rft_subject=DATE&rft_subject=DEPTH&rft_subject=EXPOCODE&rft_subject=LATITUDE&rft_subject=LONGITUDE&rft_subject=NITRAT&rft_subject=NITRAT_FLAG_W&rft_subject=OXYGEN&rft_subject=OXYGEN_FLAG_W&rft_subject=PHSPHT&rft_subject=PHSPHT_FLAG_W&rft_subject=SALNTY&rft_subject=SALNTY_FLAG_W&rft_subject=SAMPNO&rft_subject=SECT_ID&rft_subject=SILCAT&rft_subject=SILCAT_FLAG_W&rft_subject=STNNBR&rft_subject=TCARBN&rft_subject=TCARBN_FLAG_W&rft_subject=TIME&rft_subject=Ocean acidification&rft_subject=SOMMA > Single Operator Multiparameter Metabolic Analyzer&rft_subject=SHIPS&rft_subject=WOCE > World Ocean Circulation Experiment&rft_subject=AMD/AU&rft_subject=AMD/US&rft_subject=CEOS&rft_subject=AMD&rft_subject=OCEAN > SOUTHERN OCEAN&rft_subject=GEOGRAPHIC REGION > POLAR&rft.type=dataset&rft.language=English Access the data

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Attribution 4.0 International (CC BY 4.0)

https://creativecommons.org/licenses/by/4.0/legalcode

Contact Information

cdiac@ornl.gov
metadata@aad.gov.au

Brief description

---- Public Summary from Project ----
The Southern Ocean is one the most significant regions on earth for regulating the build up of anthropogenic CO2 in the atmosphere, and the capacity for carbon uptake in the region could be altered by climate change. The project aims to establish a time series of anthropogenic carbon accumulation. The work will be used to identify processes regulating the CO2 uptake and to test models that predict future uptake.

2001-2002 Season:
Data collection for this project was solely carried out on voyage three of the 2001/2002 season.

Total dissolved inorganic carbon (TCO2) and titration alkalinity (TA) measurements were made on the CLIVAR SR3 section between Hobart and Antarctica. The carbon samples were taken from a 24 bottle rosette and have an approximate horizontal resolution of 60nm with closer spacing in regions where horizontal gradients were large. Many of the stations sampled for carbon had multiple casts to improve vertical resolution.

The CRM analyses were used to calibrate the titration cell volume. Preliminary analysis of Certified Reference Material (CRM) Seawater from Scripps Institution of Oceanography show data quality was generally good. For TCO2 the measurements on Batch 52 CRM's the average concentration was 2005.65 +/- 1.36 micromol/kg (n=65; 1 s.d.). For TA the average CRM values were 2224.76 +/- 1.17 micromol/kg (n=45, 1 s.d.). The certified values for Batch 52 was 2005.57 +/- 0.39 and 2224.72 +/- 0.81 micromol/kg for TCO2 and TA, respectively.

The fields in this dataset follow standard WOCE naming practices. See the url given below for further details.

The fields in this dataset are:

EXPOCODE
SECT_ID
STNNBR
CASTNO
SAMPNO
BTLNBR
BTLNBR_FLAG_W
DATE
TIME
LATITUDE
LONGITUDE
DEPTH
CTDPRS
CTDTMP
CTDSAL
CTDSAL_FLAG_W
SALNTY
SALNTY_FLAG_W
CTDOXY
CTDOXY_FLAG_W
OXYGEN
OXYGEN_FLAG_W
SILCAT
SILCAT_FLAG_W
NITRAT
NITRAT_FLAG_W
PHSPHT
PHSPHT_FLAG_W
CFC-11
CFC-11_FLAG_W
CFC-12
CFC-12_FLAG_W
CFC113
CFC113_FLAG_W
CCL4
CCL4_FLAG_W
TCARBN
TCARBN_FLAG_W
ALKALI
ALKALI_FLAG_W

2008-2009 Season:
The Southern Ocean is a critical region on earth for taking up anthropogenic carbon dioxide (CO2) from the atmosphere. Over the past year, underway equipment has been used on a number of Aurora Australis voyages to estimate the air-sea exchange of CO2 and to characterise the variability in the exchange. The information is part of a large long term international effort to determine how much CO2 is being taken up by the ocean and to improve predictions of how the uptake and CO2 storage will change in future.

An underway CO2 system was run on a number of voyages on Aurora Australis.

Lineage

Data are quality controlled following WOCE guidelines. Flags are included with these data (good=2, bad =4, suspicious =3) and are preliminary.

2008-2009 Season:
Plans to install an aerosol sampler have been delayed because the equipment needed to be redesigned to handle Southern Ocean conditions, and there are difficulties getting people to operate the equipment on voyages. It is not certain this part of the project will be possible in 2009/2010.

Underway CO2 measurements were made during transits on Aurora Australis voyages, V1, V2(return), V3, and V5.

Difficulties affecting project:
The aerosol sampler needed to be redesigned to handle the conditions. Particulate contamination from stack gas is also a concern for the aerosol sampling.

Flooding of the oceanographic lab due to poor drainage is an ongoing problem and is causing loss of data. A problem with the ship's thermosalinograph when operated in the ice was identified a couple of years ago and is still not corrected, degrading the data quality. Cavitation in the seawater pump is also a problem that will degrade data quality for oxygen and perhaps CO2. While the problem persists it is unlikely oxygen measurements will be of much value on the ship.

The underway equipment is usually run by volunteers. The work is not arduous and requires about 20 minutes per day when the ship is underway. The Deputy Voyage Leaders often volunteer, but they are not always available. Organising volunteers and difficulty finding them has resulted in us needing to leave the systems off at times.

Data time period: 2001-11-20 to 2001-12-11

Data time period: 2008-09-30 to 2010-03-31

This dataset is part of a larger collection

146,-44 146,-67 139.75,-67 139.75,-44 146,-44

142.875,-55.5

Other Information
Find ocean carbon datasets at Pangaea (GET DATA)

uri : http://www.pangaea.de/

Find ocean carbon datasets at the Surface Ocean CO2 Atlas (GET DATA)

uri : http://www.socat.info/about.html

Descriptions of standard WOCE file formats (VIEW RELATED INFORMATION)

uri : http://cchdo.ucsd.edu/manuals/pdf/90_1/chap4.pdf

Identifiers
  • global : ASAC_1302