Data Trawler - Project details

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Project details

Title: Trace Element Cycling
Id: 2511
Investigator(s): Philip Boyd
University of Tasmania - Institute of Marine and Antarctic Studies [details]

Description: The voyage objective is to measure profiles of trace element dissolved and particulate concentrations, and to examine the processes that produce and recycle them. This work was trialled successfully during IN2016_v02 SOTS/Eddy/Capricorn voyage and will be expanded in a dedicated project during IN2018_V02. The work during IN2017_v02 will in combination with those efforts deliver observations from 3 successive years and thus contribute to defining the stability versus interannual variability in trace element levels.
Years: 2017


Journal Article

List of surveys that this project was on.

Use [details] link to view survey details (map, reports, metadata etc) including links to download data.

Survey InvestigatorDescription

Thomas W Trull (CSIRO/ACE CRC) Eric Schulz (BOM) The Southern Ocean Time Series provides world-leading automated observations from deep-ocean moorings of the exchanges of heat, water, carbon dioxide, and oxygen between the ocean and atmosphere, and the physical and biological processes that control them. These results contribute to forward projections of anthropogenic climate warming, inform the setting of emissions targets, illuminate controls on climate variability, and provide a baseline for impacts on ocean pelagic ecology. Sensor data is returned live to the internet and samples are returned annually for further study in shore laboratories. The primary objective is to first deploy a new set of SOTS moorings (SAZ-19 and SOFS-6) and then recover the existing SOTS moorings (FluxPulse-1 lower section, and SAZ-18). Additional work will obtain ancillary information on atmospheric and oceanographic conditions using CTD casts, underway measurements, the Triaxus towed body, and autonomous profiling "Bio-Argo" floats. Each of the SOTS moorings delivers to specific aspects of the atmosphere-ocean exchanges, with some redundancy: * the SAZ sediment trap mooring collects samples to quantify the transfer of carbon and other nutrients to the ocean interior by sinking particles, and investigate their ecological controls. * the Southern Ocean Flux Station (SOFS) measures meteorological properties and ocean properties important to air-sea exchanges, ocean stratification, waves, and currents. * the (now superceded) Pulse biogeochemistry mooring focused on processes important to biological CO2 consumption, including net community production from oxygen measurements and nitrate depletion, biomass concentrations from bio-optics and bio-acoustics, and collection of water samples for nutrient and plankton quantification. * the FluxPulse mooring combines some elements of Pulse onto the SOFS platform to create a combined mooring, and was deployed for the first time in 2016, but broke into two sections. The top section has been recovered. The bottom section remains to be recovered. This combined mooring was intended to meet financial constraints. In 2017 we will use the simpler SOFS design, while redesigning FluxPulse for relaunch in 2018. Piggyback projects: * International Nutrient Intercalibration Exercise * Spatial and Temporal Variability in the Distribution and Abundance of Seabirds * Trace Element Cycling * Acoustic estimates of zooplankton and fish distributions
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