Upcoming voyages

 

 

 

 

  • FeCycle III: Understanding how fast the Ferrous wheel spins

 


 

 

 

 

 

Past voyages

 

 

 

This joint Australian-New Zealand expedition will undertake an integrated oceanographic transect and dust monitoring program for iron, other trace elements, and their isotopes (TEIs) along the western end of the GP13 zonal section (~30 oS) east of Australia. Station locations along the Australian leg of the GEOTRACES GP13 will be at 1o longitude spacing while super stations every 5o and mega stations every 10o.  Our start port will be Brisbane and finish port Auckland.

 

 

 

 

 

PINTS – Primary productivity induced by Iron and Nitrogen in the Tasman Sea

The main purpose of this voyage is to investigate the cycling of macro- and micronutrients, mainly iron and nitrate, in the Tasman Sea. 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.

 

  Spring Bloom /FeCycle II

Overarching question – what determines productivity & carbon export in NZ waters during the spring bloom

  SR3-GEOTRACES

Micronutrient trace elements exert an important influence on the growth and activity of microscopic life-forms in Southern Ocean surface waters. They in turn govern the drawdown of atmospheric carbon dioxide, a major factor in global climate change. This project joins with other international groups during the International Polar Year 2007-08 to carry out the first intensive circumpolar study of distribution and pathways of micronutrients in this important oceanic region

 
  SAZ-Sense (Sensitivity of the Sub-Antarctic Zone to Environmental Change)
The overall objective is to characterize Southern Ocean marine ecosystems, their influence on carbon dioxide exchange with the atmosphere and the deep ocean, and their sensitivity to past and future global change including climate warming, ocean stratification, and ocean acidification from anthropogenic CO2 emissions. In particular we plan to take advantage of naturally-occurring, persistent, zonal variations in Southern Ocean primary production and biomass in the Australian Sector to investigate the effects of iron addition from natural sources, and CO2 addition from anthropogenic sources, on Southern Ocean plankton communities of differing initial structure and composition.

 

Publications: Bowie et al 2009, Deep Sea Research II - special issue in press

  KEOPS KErguelen: compared study of the Ocean and the Plateau in Surface water

KEOPS is the study the effect of natural iron fertilisation of the ocean by the Kerguelen plateau, on the biological pump of CO2 and on the cycles of other chemical compounds relevant for climate. A multidisciplinary approach is used, coupling physics, biogeochemistry and ocean modelling.  This international project is a close collaboration between French and Australian teams.

 

 
  Ncycle voyage

Establish the processes and controls on the flux and cycling of the major limiting nutrient, nitrogen, at two/three in contrasting locations (N1 & S1), or at N1, N2, & S1 in NZ oligtrophic waters.  Video - Craig

Publications: Law et al. submitted, Ellwood et al. in prep, Stevens et al. in prep