Cruise support: the CROZEX experiment

The Crozet natural iron bloom and Export experiment (CROZEX) was an National Oceanography Centre project that employed two 5-week studies of the Crozet Plateau in the Southern Ocean where iron from shallow sediments initiates phytoplankton blooms in an otherwise iron-limited region (Fig. 1). NEODAAS provided near-real time support for the cruises.

Raymond Pollard, the principal investigator, noted: "20 papers have been published in Deep-Sea Research II......the whole CROZEX cruise, and hence all papers arising from it, depended on your real time services to find optimum bloom and non-bloom sites. We reached the area AFTER the peak of the bloom, so have reconstructed the bloom from satellite data alone. A PhD thesis was also heavily dependent on satellite data provided by NEODAAS."

MODIS chl-a composite showing bloom at Crozet Plateau

Figure 1: MODIS chl-a composite 7-13 Jan 2005 showing bloom at Crozet Plateau;

Five papers in the special issue of Deep-Sea Research II explicitly acknowledged the support of NEODAAS:

Bakker, D.C.E., Nielsdottir, M.C., Morris, P.J., Venables, H.J. & Watson, A.J. (2007) The island mass effect and biological carbon uptake for the subantarctic Crozet Archipelago. Deep Sea Research Part II: Topical Studies in Oceanography, 54(18-20), 2174-2190.

Fielding, S., Ward, P., Pollard, R.T., Seeyave, S., Read, J.F., Hughes, J.A., Smith, T. & Castellani, C. (2007) Large-scale circulation around the Crozet Plateau controls an annual phytoplankton bloom in the Crozet Basin. Deep Sea Research Part II: Topical Studies in Oceanography, 54(18-20), 2106-2125.

Pollard, R.T., Venables, H.J., Read, J.F. & Allen, J.T. (2007) Large-scale circulation around the Crozet Plateau controls an annual phytoplankton bloom in the Crozet Basin. Deep Sea Research Part II: Topical Studies in Oceanography, 54(18-20), 1915-1929.

Popova, E.E., Pollard R.T., Lucas, M.I., Venables, H.J. & Anderson, T.R. (2007) Real-time forecasting of ecosystem dynamics during the CROZEX experiment and the roles of light, iron, silicate, and circulation. Deep Sea Research Part II: Topical Studies in Oceanography, 54(18-20), 1966-1988.

Venables, H.J., Pollard, R.T. & Popova, E.E. (2007) Physical conditions controlling the development of a regular phytoplankton bloom north of the Crozet Plateau, Southern Ocean. Deep Sea Research Part II: Topical Studies in Oceanography, 54(18-20), 1949-1965.