From Australian Oceans Data Network
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IMOS - Argo Profiles - biogeochemical data

Created 13/03/2025

Updated 13/03/2025

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The IMOS Biogeochemical Argo sub-facility aims to undertake real time monitoring of the broad ocean state around Australia by deploying Biogeochemical Argo floats in scientifically important areas of Australia's Exclusive Economic Zone, surrounding seas and the Southern Ocean. The data presented here, includes all Biogeochemical Argo profiles collected since 2002, and covers the oceans worldwide. In collaboration with the US SOCCOM project, the first IMOS Australia Biogeochemical Argo floats were deployed in the East Australia Current in September 2019. Biogeochemical Argo floats are profiling floats that, in addition to temperature and salinity (this data is provided by the IMOS - Argo Profiles - core data collection, https://catalogue-imos.aodn.org.au/geonetwork/srv/eng/catalog.search#/metadata/4402cb50-e20a-44ee-93e6-4728259250d2), carry sensors to measure any combination of dissolved oxygen, pH, dissolved nitrate, chlorophyll fluorescence, particulate backscatter and incoming solar radiation (data provided for the first 4 variables only). A typical Argo float mission is to profile from 2000 m depth to the sea surface every 10 days. On deployment, the float sinks to a depth of 1000 m and drifts with the ocean currents for 9 days. Then the float sinks deeper to its profile depth (usually 2000 m) before starting to ascend through the water column measuring parameters as it rises. Once at the surface it transmits location and profile data via satellite to land-based Argo data centres. After transmission the float sinks again and repeats the cycle. Each Argo float is identified by a unique identification number called a WMO ID. WMO (World Meteorological Organisation) ID Numbers are assigned to measurement stations and observing platforms to enable researchers to keep track of, and uniquely identify their floats. The average life of the latest model APEX Argo floats are around 3.7 years or approximately 135 cycles. These statistics are for floats with the standard alkaline battery configuration from an analysis by Kobayashi et al (2009). In the Australian Argo program, the floats are deployed with a combination of lithium and alkaline battery packs which extends float lifetime. Argo Australia floats usually last 5 years.

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Title IMOS - Argo Profiles - biogeochemical data
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/da4303fc-cdd7-4304-9fc7-c9762548dc3a
Contact Point
CSIRO Oceans & Atmosphere
Tom.Trull@csiro.au
Reference Period 02/07/2024
Data Portal data.gov.au

Data Source

This dataset was originally found on data.gov.au "IMOS - Argo Profiles - biogeochemical data". Please visit the source to access the original metadata of the dataset:
https://devweb.dga.links.com.au/data/dataset/imos-argo-profiles-biogeochemical-data

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