FN Archimer Export Format
PT J
TI Coupling physical and biogeochemical processes in the Rio de la Plata plume
OT Modélisation couplée physique-biogéochimie des processus du panache du Rio de la Plata
BT 
AF HURET, Martin
   DADOU, Isabelle
   DUMAS, Franck
   LAZURE, Pascal
   GARCON, Véronique
AS 1:;2:;3:;4:;5:;
FF 1:PDG-DOP-DCB-DYNECO-PELAGOS;2:;3:PDG-DOP-DCB-DYNECO-PHYSED;4:PDG-DOP-DCB-DYNECO-PHYSED;5:;
C1 CNRS, LEGOS, F-31401 Toulouse, France.
   IFREMER, Ctr Brest, F-29280 Plouzane, France.
C2 CNRS, FRANCE
   IFREMER, FRANCE
SI BREST
SE PDG-DOP-DCB-DYNECO-PELAGOS
   PDG-DOP-DCB-DYNECO-PHYSED
IN WOS Ifremer jusqu'en 2018
IF 1.694
TC 51
UR https://archimer.ifremer.fr/doc/2005/publication-334.pdf
LA English
DT Article
DE ;Rio de la Plata;SeaWiFS;Primary production;Chlorophyll;River plumes;Biogeochemical modelling;Physical
AB A coupled three-dimensional physical-biogeochemical model was developed in order to simulate the ecological functioning of the Rio de la Plata estuary and plume. The biogeochemical model reproduces the nitrogen cycle between five compartments: dissolved inorganic nitrogen, phytoplankton, zooplankton, detritus and dissolved organic nitrogen. The coupling is tested in seasonal climatological configurations and for the particular year 1999. The circulation is forced with Parana and Uruguay rivers discharges, NCEP wind and tide. The biogeochemical model includes loads of inorganic and organic nitrogen from both rivers. The model reproduces the correct tidal amplitudes in the estuary, as well as the most outstanding features of the observed horizontal and vertical structures of the salinity plume. Simulated surface chlorophyll a concentrations exhibit maximum values all year long seaward of the turbidity front, between the 0.5 and 15 isohalines, in agreement with SeaWiFS images of the area. The model simulates well the low primary production in the light-limited highly turbid tidal river (20 gC/m(2)/yr), the high production area in the frontal zone where it can reach 500 gC/m(2)/yr, and the nutrient-limited production in the outer estuary and inner shelf (300 gC/m(2)/yr), with realistic values in each case. According to the 1999 model simulation, the tidal river is the location of organic nitrogen remineralization with a consequent increase of the inorganic pool. At the entrance of the frontal zone, inorganic nitrogen represents about 75% of the whole nitrogen pool, it is reduced to 50% at its sea end-member. The outer estuary has the same sink role for inorganic nitrogen, suggesting that organic nitrogen is the major form exported to the shelf.
PY 2005
PD MAR
SO Continental Shelf Research
SN 0278-4343
PU Elsevier
VL 25
IS 5-6
UT 000227549000004
BP 629
EP 653
DI 10.1016/j.csr.2004.10.003
ID 334
ER

EF