Antarctic Science



Remotely sensed primary production in the western Ross Sea: results of in situ tuned models


R. BARBINI a1, F. COLAO a1, R. FANTONI a1, L. FIORANI a1, A. PALUCCI a1c1, E.S. ARTAMONOV a2 and M. GALLI a3
a1 ENEA, Via Fermi 45, 00044 Frascati, Italy
a2 Institute of Atmospheric Optics, SB RAS, Akademicheskii Av., 1, Tomsk 634055, Russia
a3 ENEA guest

Abstract

The Southern Ocean plays an important role in the global carbon cycle and, as a consequence, in the planetary climate equilibrium. The Ross Sea is one of the more productive regions in the Southern Ocean, due to strong phytoplankton blooms occurring during summer. Satellite remote sensing is a powerful tool for investigating such phenomena, especially if the bio-optical algorithms are tuned with in situ data. In this paper, after having compared the Sea-viewing Wide Field-of-view Sensor (SeaWiFS) and the ENEA Lidar Fluorosensor (ELF), the SeaWiFS chlorophyll a (Chl a) algorithm is tuned in the Ross Sea by means of the ELF measurements. The Chl a concentrations obtained in this way have been the basis for estimating productivity values and their evolution during summer 1997–98. Three primary production models have been used, providing information on their accuracy and performance in the Antarctic environment. Our investigations suggest that the primary production was lower than usual during the period 3 December 1997–16 January 1998.

(Received February 13 2002)
(Accepted October 5 2002)


Key Words: Antarctica; lidar fluorosensor; oceanography; phytoplankton; satellite radiometer.

Correspondence:
c1 corresponding author


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