Data Trawler - Project details

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Project details

Title: Properties of Southern Ocean Clouds and Aerosol
Id: 2541
Investigator(s): Alain Protat
Bureau of Meteorology [details]

Description: The scientific objectives are to characterize cloud and aerosol properties using physical and chemical sensor measurements and sample collections.
Years: 2015


Journal Article

List of surveys that this project was on.

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Survey InvestigatorDescription

T. Trull (CSIRO O&A); E. Schulz (BOM) MNF RV Investigator Research Voyage IN2015_v01. IMOS Southern Ocean Time Series(SOTS) Automated Moorings for Climate and Carbon Cycle Studies Southwest Of Tasmania. Scientific objectives: The Southern Ocean has a predominant role in the movement of heat and carbon dioxide into the ocean interior moderating Earth's average surface climate. SOTS uses a set of three automated mooring to measure these processes under extreme conditions, where they are most intense and have been least studied. The atmosphere-ocean exchanges occur on many timescales, from daily insolation cycles to ocean basin decadal oscillations and thus high frequency observations sustained over many years are required. The current context of anthropogenic forcing of rapid climate change adds urgency to the work. Voyage objectives: The primary objective is to deploy a full set of SOTS moorings (SOFS, Pulse, and SAZ) and to obtain ancillary information of the oceanographic conditions at the time of deployment using CTD casts, underway measurements, the Triaxus towed body, and deployment of autonomous profiling Bio-Argo floats. Each of the SOTS moorings delivers to specific aspects of the atmosphere-ocean exchanges, with some redundancy: i) the Southern Ocean Flux Station (SOFS) focuses on air properties, ocean stratification, waves, and currents. ii) the Pulse biogeochemistry mooring focuses 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. iii) the SAZ sediment trap mooring focuses on quantifying the transfer of carbon and other nutrients to the ocean interior by sinking particles, and collecting samples to investigate their ecological controls. Additional water sampling and sensor comparisons against shipboard systems provide quality control and spatial context, which is further augmented by Bio-Argo float and Triaxus towed body deployments, and satellite remote sensing. Please read voyage plan for full description.
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