FN Archimer Export Format
PT J
TI Structure and Dynamics of the Ras al Hadd Oceanic Dipole in the Arabian Sea
BT 
AF Ayouche, Adam
   De Marez, Charly
   MORVAN, Mathieu
   L'Hegaret, Pierre
   Carton, Xavier
   Le Vu, Briac
   Stegner, Alexandre
AS 1:1;2:3;3:3;4:3;5:3;6:2;7:2;
FF 1:PDG-ODE-LOPS-OC;2:;3:;4:;5:;6:;7:;
C1 Laboratoire d’Océanographie Physique et Spatiale, Institut Universitaire Européen de la Mer, Universite de Bretagne Occidentale, 29200 Brest, France
   Le Laboratoire de météorologie dynamique (LMD), Ecole Polytechnique, 91120 Palaiseau, France
   Laboratoire d’Océanographie Physique et Spatiale, Institut Universitaire Européen de la Mer, Universite de Bretagne Occidentale, 29200 Brest, France
C2 IFREMER, FRANCE
   ECOLE POLYTECH, FRANCE
   UBO, FRANCE
SI BREST
SE PDG-ODE-LOPS-OC
UM LOPS
IN WOS Ifremer UMR
   WOS Cotutelle UMR
   DOAJ
   copubli-france
   copubli-univ-france
TC 12
UR https://archimer.ifremer.fr/doc/00679/79107/81598.pdf
LA English
DT Article
DE ;ras al hadd oceanic dipole;arabian sea;cyclonic and anticyclonic eddies;altimetric data;angular momentum eddy detection and tracking algorithm (AMEDA);HYCOM model;ARGO floats
AB The Ras al Hadd oceanic dipole is a recurrent association of a cyclone (to the northeast) and of an anticyclone (to the southwest), which forms in summer and breaks up at the end of autumn. It lies near the Ras al Hadd cape, southeast of the Arabian peninsula. Its size is on the order of 100 km. Along the axis of this dipole flows an intense jet, the Ras al Had jet. Using altimetric data and an eddy detection and tracking algorithm (AMEDA: Angular Momentum Eddy Detection and tracking Algorithm), we describe the life cycle of this oceanic dipole over a year (2014–2015). We also use the results of a numerical model (HYCOM, the HYbrid Coordinate Ocean Model) simulation, and hydrological data from ARGO profilers, to characterize the vertical structure of the two eddies composing the dipole, and their variability over a 15 year period. We show that (1) before the dipole is formed, the two eddies that will compose it, come from different locations to join near Ras al Hadd, (2) the dipole remains near Ras al Hadd during summer and fall while the wind stress (due to the summer monsoon wind) intensifies the cyclone, (3) both the anticyclone and the cyclone reach the depth of the Persian Gulf Water outflow, and (4) their horizontal radial velocity profile is often close to Gaussian but it can vary as the dipole interacts with neighboring eddies. As a conclusion, further work with a process model is recommended to quantify the interaction of this dipole with surrounding eddies and with the atmosphere. 
PY 2021
PD MAR
SO Oceans-switzerland
SN 2673-1924
PU MDPI AG
VL 2
IS 1
UT 001008175200001
BP 105
EP 125
DI 10.3390/oceans2010007
ID 79107
ER

EF