Structure and Dynamics of the Ras al Hadd Oceanic Dipole in the Arabian Sea
| العنوان: | Structure and Dynamics of the Ras al Hadd Oceanic Dipole in the Arabian Sea |
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| المؤلفون: | Alexandre Stegner, Mathieu Morvan, Pierre L'Hégaret, Briac Le Vu, Charly de Marez, Xavier Carton, Adam Ayouche |
| المساهمون: | Laboratoire d'Océanographie Physique et Spatiale (LOPS), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Météorologie Dynamique (UMR 8539) (LMD), Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris, École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL) |
| المصدر: | Oceans Oceans, MDPI, 2021, 2 (1), pp.105-125. ⟨10.3390/oceans2010007⟩ Volume 2 Issue 1 Pages 7-125 Oceans, Vol 2, Iss 7, Pp 105-125 (2021) Oceans-switzerland (2673-1924) (MDPI AG), 2021-03, Vol. 2, N. 1, P. 105-125 Oceans, 2021, 2 (1), pp.105-125. ⟨10.3390/oceans2010007⟩ |
| بيانات النشر: | HAL CCSD, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | ras al hadd oceanic dipole, 010504 meteorology & atmospheric sciences, altimetric data, angular momentum eddy detection and tracking algorithm (AMEDA), Wind stress, arabian sea, Monsoon, 01 natural sciences, Physics::Geophysics, cyclonic and anticyclonic eddies, lcsh:Oceanography, ARGO floats, HYCOM model, lcsh:GC1-1581, 14. Life underwater, Arabian sea, Argo, Physics::Atmospheric and Oceanic Physics, [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography, 0105 earth and related environmental sciences, 010505 oceanography, Geophysics, Dipole, Eddy, 13. Climate action, Anticyclone, Cyclone, Outflow, Geology |
| الوصف: | International audience; 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. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 2673-1924 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dccfebc3dfe8a932bece69656a2de624 https://hal.archives-ouvertes.fr/hal-03484679 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....dccfebc3dfe8a932bece69656a2de624 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 26731924 |
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