FN Archimer Export Format
PT J
TI A model of the general circulation in the Persian Gulf and in the Strait of Hormuz: Intraseasonal to interannual variability
BT 
AF POUS, Stephane
   LAZURE, Pascal
   CARTON, Xavier
AS 1:1,4,5;2:2;3:3,5;
FF 1:;2:PDG-ODE-DYNECO-PHYSED;3:;
C1 Sorbonne Universités (UPMC, Univ Paris 06)-CNRS-IRD-MNHN, LOCEAN Laboratory, 4 place Jussieu, F-75005 Paris, France
   DYNECO, IFREMER, BP 70, 29280 Plouzané, France
   LPO, IUEM, Univ. Bretagne Occ., 6 Av. Le Gorgeu, 29200 Brest, France
   Department of Oceanography, University of Cape Town, South Africa
   Ifremer, France
C2 UNIV PARIS 06, FRANCE
   IFREMER, FRANCE
   UBO, FRANCE
   UNIV CAPE TOWN, SOUTH AFRICA
   IFREMER, FRANCE
SI BREST
SE PDG-ODE-DYNECO-PHYSED
UM LOPS
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
   copubli-sud
IF 2.011
TC 74
UR https://archimer.ifremer.fr/doc/00244/35563/35324.pdf
LA English
DT Article
DE ;Persian Gulf;Strait of Hormuz;Numerical model;Hydrology;Currents;Interannual variability
AB Previous studies modeling the circulation and thermohaline structure in the Persian Gulf have suggested that interannual variability and vertical mixing processes could explain the model biases when compared to the few observations available. Here, a realistic, interannual, high-resolution model of the Persian Gulf is presented, validated against observations and then used to describe the intraseasonal to interannual variability in the circulation, water mass formation and exchange through the Strait of Hormuz. Sensitivity experiments to model settings, in particular vertical mixing parameterizations, have been performed in order to have the best comparison with all available observations. Main circulation and water mass characteristics correspond well to observations and previous modeling studies on the seasonal timescale. A barotropic cyclonic gyre dominates the general circulation in the Gulf from April to July then breaks down into smaller features as wind intensifies and stratification decreases due to winter cooling. Dense salty water is formed in the northwest part of the Gulf and in the southern banks, but the latter reaches the Strait of Hormuz from November to April only. While temperature fluctuations are mostly seasonal, salinity has substantial fluctuations on the interannual timescale that cannot be directly related to atmospheric fluxes because of the importance of the exchanges at Hormuz for the salt budget within the Gulf. This advocates the use of atmospheric conditions including interannual variations when running models of the Persian Gulf. On the other hand, the interannual variations in the net transport at Hormuz directly follow variations in the evaporation minus precipitation over the Gulf. Thermohaline structure and circulation also vary on intraseasonal timescale, induced by the high-frequency tidal and atmospheric forcings. Finally, some biases remain in the simulations presented here, mostly due to the lack of observations of the evaporation rate, precipitation and river discharges.
PY 2015
PD FEB
SO Continental Shelf Research
SN 0278-4343
PU Elsevier
VL 94
UT 000349804200006
BP 55
EP 70
DI 10.1016/j.csr.2014.12.008
ID 35563
ER

EF