Document of bibliographic reference 69966

BibliographicReference record

Type

Bibliographic resource

Type of document

Journal article

BibLvlCode

AS

Title

Linking ocean biogeochemical cycles and ecosystem structure and function: results of the complex SWAMCO-4 model

Abstract

We present results obtained with SWAMCO-4, a complex model of the marine planktonic system calculating C, N, P, Si, Fe cycling within the upper ocean, the export production and the exchange of CO₂ between the ocean and atmosphere. The model, constrained by physical, chemical and biological (grazing, lysis) controls, explicitly details the dynamics of four relevant phytoplankton functional groups with respect to C, N, P, Si, Fe cycling and climate change. Those are diatoms, pico/nano phytoplankton, coccolithophorids, and Phaeocystis spp. whose growth regulation by light, temperature and nutrients has been obtained based on a comprehensive analysis of literature reviews on these taxonomic groups. The performance of SWAMCO-4 is first evaluated in a 1D physical frame throughout its cross application in provinces with contrasted key species dominance, export production, CO₂ air-sea fluxes and where biogeochemical time-series data are available for model initialisation and comparison of results. These are: (i) the ice-free Southern Ocean Time Series station KERFIX (50°40S, 68°E) for the period 1993-1994 (diatom-dominated); (ii) the sea-ice associated Ross Sea domain (Station S; 76°S, 180°W) of the Antarctic Environment and Southern Ocean Process Study AESOPS in 1996-1997 (Phaeocystis-dominated); and (iii) the North Atlantic Bloom Experiment NABE (60°N, 20°W) in 1991 (coccolithophorids). We then explore and compare the ocean response to increased atmospheric CO₂ by running SWAMCO-4 at the different locations over the last decade. Results show that at all tested latitudes the prescribed increase of atmospheric CO₂ enhances the carbon uptake by the ocean. However, the amplitude of the predicted atmospheric CO₂ sinks displays large regional and interannual variations due to the actual meteorological forcing that drives the local hydrodynamics. This is particularly true in the marginal ice zone of the Ross Sea (AESOPS) where the magnitude of the predicted annual CO₂ sink is positively related to the length of the surface ocean ice-cover period which determines the iron surface concentration at the time of ice melting.

WebOfScience code

https://www.webofscience.com/wos/woscc/full-record/WOS:000226392000006

Bibliographic citation

Pasquer, B.; Laruelle, G.; Becquevort, S.; Schoemann, V.; Goosse, H.; Lancelot, C. (2005). Linking ocean biogeochemical cycles and ecosystem structure and function: results of the complex SWAMCO-4 model. J. Sea Res. 53(1-2): 93-108. https://dx.doi.org/10.1016/j.seares.2004.07.001

location created

Ecologie des Systèmes Aquatiques, Université Libre de Bruxelles

Topic

Marine

Is peer reviewed

true