ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=http://apps.aims.gov.au/metadata/view/603c548f-883d-4895-9052-c020efcc23c1&rft.title=Ocean Acidification and Dissolved Carbon Dioxide Sensors - Davies Reef CO2/pH&rft.identifier=http://apps.aims.gov.au/metadata/view/603c548f-883d-4895-9052-c020efcc23c1&rft.publisher=Australian Institute of Marine Science (AIMS)&rft.description=The Australian Institute of Marine Science (AIMS) maintains a weather station tower at Davies Reef east of Townsville in the great barrier reef. Measurements of near-surface ocean acidity (pH), dissolved carbon dioxide (pCO2) and dissolved oxygen (DO) are taken from instrumentation mounted on a buoy adjacent to the weather station tower. All data records include sampling time (UCT), position (Latitude, Longitude). The data is records in near real time using a microwave communications link back to AIMS at Cape Ferguson. Data are recorded at 10 minute intervals for DO and pH, 3 hourly for pCO2. The sampling intakes are located at depths of 1.9m. The data is ingested in near real time by the AIMS Data Centre via the Real Time Data System (RTDS). Components of the RTDS also provide visualisation techniques like charting services, mapping services, and download services where appropriate. The purpose for collecting this data can be summarised as follows. 1. To document anthropogenic changes in pH and aragonite saturation state as a result of ocean acidification. 2. To determine key biogeochemical processes that affect the resilience of the Great Barrier Reef shelf to ocean acidification and to pinpoint areas of high and low resilience to ocean acidification. Calibration and Servicing is a necessary component for obtaining quality data sets. A spare pH sensor is calibrated at AIMS and rotated into the buoy on a regular basis. Each pH probe is recalibrated on its return to AIMS, the pre-calibration values providing a check of the probe stability and allowing for calibration correction factors to be calculated. The Battelle pCO2 system has an internal WMO standard gas which calibrates the instrument prior to each 3 hourly reading of the seawater and air. The DO instrument is factory calibrated every 6 months. The CO2 gas equilibration device (GED), is inspected during monthly visits and swabbed to remove algae or other contaminants. A shutter on the DO instrument opens for readings and remains closed for the intervals between measurements, keeping the optical aperture surface very clean.Statement: See each of the sub-components for details of the quality control for that data.&rft.creator=Australian Institute of Marine Science (AIMS) &rft.date=2015&rft.coverage=northlimit=-19.268855; southlimit=-19.268855; westlimit=147.054534; eastLimit=147.054534&rft.coverage=northlimit=-19.268855; southlimit=-19.268855; westlimit=147.054534; eastLimit=147.054534&rft.coverage=northlimit=-18.83; southlimit=-18.83; westlimit=147.63; eastLimit=147.63&rft.coverage=northlimit=-18.83; southlimit=-18.83; westlimit=147.63; eastLimit=147.63&rft_rights=All AIMS data, products and services are provided as is and AIMS does not warrant their fitness for a particular purpose or non-infringement. While AIMS has made every reasonable effort to ensure high quality of the data, products and services, to the extent permitted by law the data, products and services are provided without any warranties of any kind, either expressed or implied, including without limitation any implied warranties of title, merchantability, and fitness for a particular purpose or non-infringement. AIMS make no representation or warranty that the data, products and services are accurate, complete, reliable or current. To the extent permitted by law, AIMS exclude all liability to any person arising directly or indirectly from the use of the data, products and services.&rft_rights=The data was collected under contract between AIMS and another party(s). Specific agreements for access and use of the data shall be negotiated separately. Contact the AIMS Data Centre (adc@aims.gov.au) for further information&rft_subject=Oceans&rft.type=dataset&rft.language=English Access the data

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All AIMS data, products and services are provided "as is" and AIMS does not warrant their fitness for a particular purpose or non-infringement. While AIMS has made every reasonable effort to ensure high quality of the data, products and services, to the extent permitted by law the data, products and services are provided without any warranties of any kind, either expressed or implied, including without limitation any implied warranties of title, merchantability, and fitness for a particular purpose or non-infringement. AIMS make no representation or warranty that the data, products and services are accurate, complete, reliable or current. To the extent permitted by law, AIMS exclude all liability to any person arising directly or indirectly from the use of the data, products and services.

The data was collected under contract between AIMS and another party(s). Specific agreements for access and use of the data shall be negotiated separately. Contact the AIMS Data Centre (adc@aims.gov.au) for further information

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Brief description

The Australian Institute of Marine Science (AIMS) maintains a weather station tower at Davies Reef east of Townsville in the great barrier reef. Measurements of near-surface ocean acidity (pH), dissolved carbon dioxide (pCO2) and dissolved oxygen (DO) are taken from instrumentation mounted on a buoy adjacent to the weather station tower. All data records include sampling time (UCT), position (Latitude, Longitude). The data is records in near real time using a microwave communications link back to AIMS at Cape Ferguson.

Data are recorded at 10 minute intervals for DO and pH, 3 hourly for pCO2. The sampling intakes are located at depths of 1.9m. The data is ingested in near real time by the AIMS Data Centre via the Real Time Data System (RTDS). Components of the RTDS also provide visualisation techniques like charting services, mapping services, and download services where appropriate.

The purpose for collecting this data can be summarised as follows.
1. To document anthropogenic changes in pH and aragonite saturation state as a result of ocean acidification.
2. To determine key biogeochemical processes that affect the resilience of the Great Barrier Reef shelf to ocean acidification and to pinpoint areas of high and low resilience to ocean acidification.

Calibration and Servicing is a necessary component for obtaining quality data sets. A spare pH sensor is calibrated at AIMS and rotated into the buoy on a regular basis. Each pH probe is recalibrated on its return to AIMS, the pre-calibration values providing a check of the probe stability and allowing for calibration correction factors to be calculated. The Battelle pCO2 system has an internal WMO standard gas which calibrates the instrument prior to each 3 hourly reading of the seawater and air. The DO instrument is factory calibrated every 6 months.

The CO2 gas equilibration device (GED), is inspected during monthly visits and swabbed to remove algae or other contaminants. A shutter on the DO instrument opens for readings and remains closed for the intervals between measurements, keeping the optical aperture surface very clean.

Notes

John Pfitzner
Fabricius, Katharina E, Dr (Principal Investigator)
Smith, Joy (Point Of Contact)

Lineage

Statement: See each of the sub-components for details of the quality control for that data.

Modified: 20190704

Data time period: 2017-08-06

This dataset is part of a larger collection

Click to explore relationships graph

147.054534,-19.268855

147.054534,-19.268855

147.63,-18.83

147.63,-18.83

text: northlimit=-19.268855; southlimit=-19.268855; westlimit=147.054534; eastLimit=147.054534

text: northlimit=-18.83; southlimit=-18.83; westlimit=147.63; eastLimit=147.63

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oceans |

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