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Project details
| Title: | National Facility External Users: C. Hassler (UTS) |
| Id: | 2371 |
| Acronym: | National Facility user: Hassler, C |
| Investigator(s): | Christel Hassler
University of Technology, Sydney [details] |
| Description: | |
| Description (full): | National Facility External User Christel Hassler |
| Years: | 2010 |
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 | Investigator | Description |
|---|---|---|
| SS2010_V01 [details] |
C Hassler (UTS) | Southern Surveyor research voyage ss2010_v01 PINTS - primary Productivity induced by Nitrogen and Iron in the Tasman Sea. Role of iron and other micronutrients in controlling primary productivity in the Tasman Sea: bioavailability, biogeochemical cycling and sources. Scientific Objectives -Macro- and micronutrients, mainly iron and nitrate, control oceanic primary productivity, phytoplankton community composition and subsequently carbon uptake and generation of radiatively important gases for climate. Assessing key underlying processes that control primary productivity and carbon export to the ocean's interior such as micro and macro-nutrient bioavailability is required to fully understand the ocean role in controlling climate change and improve modelling approaches. Indeed, data allowing an accurate modelling of iron bioavailability in the oceans is sparse. Although large dust deposition from eastern Australia to the ocean may occur, the Tasman Sea presents a region of great contrast: northern waters are nutrient poor while southern waters are nutrient rich, but low in iron. Consequently, the input of iron via dust to the northern and southern regions may influence nutrient uptake, primary production and nitrogen fixation. The proposed research voyage will study iron bioavailability, sources and its biogeochemical cycling in the surface waters of the Tasman Sea, along with the role of other micronutrients. Our proposed voyage track will provide measurements on the effect of variable sources of iron (Australian continental dust, shelf sediments) on iron biogeochemistry. Results from this voyage will also provide modellers at CMAR with a key dataset to predict the biological control of the oceans on climate. This project will develop new methods for measuring iron bioavailability (e.g. iron dependent bioreporter) and limitation (e.g. photophysiological parameters) in the ocean, with potentially wide application to the growth of Australian and international |