Mesoscale eddies in the Gulf of Aden and their impact on the spreading of Red Sea Outflow Water

Bower, Amy S.; Furey, Heather H.

doi:10.1016/j.pocean.2011.09.003

Cited by 45 publications

(64 citation statements)

References 62 publications

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“…This water was contained in the large cyclone which lay around 47 • E, 12 • 30 N at day 40 of the mission. This confirms the conclusion drawn by Bower and Furey (2011) that westward drifting eddies can transport ICW into the Gulf of Aden and mix it with RSOW there.…”

Section: Methodssupporting

confidence: 90%

“…Indeed, gyres in the Gulf of Aden have a noticeable barotropic component (Bower et al, 2002;Bower and Furey, 2011).…”

Section: Methodsmentioning

confidence: 99%

“…In the Gulf of Aden, the Somali Current Ring and the Gulf of Aden Eddy appear at the end of the summer and winter monsoons respectively, and the Gulf of Aden eddy propagates westward into the Gulf while the Somali Current Ring remains relatively stationary at the entrance of the Gulf. Recently, Bower and Furey (2011) have shown the existence of two other eddies in the Gulf of Aden: the Lee Eddy and the Summer Eddy which form early during the summer monsoon due to strong winds blowing through the Socotra Passage.…”

Section: Carton Et Al: Mesoscale Variability In the Arabian Seamentioning

confidence: 99%

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Mesoscale variability of water masses in the Arabian Sea as revealed by ARGO floats

2012

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Abstract. By analysing ARGO float data over the last four years, a few aspects of the mesoscale variability of water masses in the Arabian Sea are described.The Red Sea Outflow Water (RSOW) is concentrated in the Southwestern Gulf of Aden, in particular when a cyclonic gyre predominates in this region. Salinities of 36.5 and temperatures of 16 • C are found in this area at depths between 600 and 1000 m. RSOW is more dilute in the eastern part of the Gulf, where intense and relatively barotropic gyres mix it with Indian ocean Central Water. RSOW is also detected along the northeastern coast of Socotra, and fragments of RSOW are found between one and three degrees of latitude north of this island. In the whole Gulf of Aden, the correlation between the deep motions of the floats and the sealevel anomaly measured by altimetry is strong, at regional scale. The finer scale details of the float trajectories are not sampled by altimetry and are often related to the anomalous water masses that the floats encounter.The Persian Gulf Water (PGW) is found in the float profiles near Ras ash Sharbatat (near 57 • E, 18 • N), again with 36.5 in salinity and about 18-19 • C in temperature. These observations were achieved in winter when the southwestward monsoon currents can advect PGW along the South Arabian coast. Fragments of PGW were also observed in the Arabian Sea between 18 and 20 • N and 63 and 65 • E in summer, showing that this water mass can escape the Gulf of Oman southeastward, during that season.Kinetic energy distributions of floats with respect to distance or angle share common features between the two regions (Gulf of Aden and Arabian Sea), in particular peaks at 30, 50 and 150 km scales and along the axis of monsoon currents. Hydrological measurements by floats are also influenced by the seasonal variations of PGW and RSOW in these regions.

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Section: Methodssupporting

confidence: 90%

“…Indeed, gyres in the Gulf of Aden have a noticeable barotropic component (Bower et al, 2002;Bower and Furey, 2011).…”

Section: Methodsmentioning

confidence: 99%

Section: Carton Et Al: Mesoscale Variability In the Arabian Seamentioning

confidence: 99%

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Mesoscale variability of water masses in the Arabian Sea as revealed by ARGO floats

2012

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“…The most energetic currents are observed around C1, A2 and along the coastal "belt". In Bower and Furey (2012), Carton et al (2012) andL'Hégaret et al (2013), correlations are found between the surface circulation induced by the eddies and the structure of the salty outflows from the Red Sea and the Persian Gulf. The velocity map gives a first glimpse of the pathway of the PGW: in the western Sea of Oman, the water mass equilibrated and flowed along the southern coast; then, it was ejected northward from the coast at Ra's Al Hamra, under the influence of A1.…”

Section: Structure Of Mesoscale Eddies and Their Relation To The Pgw mentioning

confidence: 99%

“…These eddies are known to dominate the near-surface circulation offshore (see Fischer et al, 2002) and to induce horizontal transports. They have a vertical influence on the water masses at depth (see Furey, 2012, andCarton et al, 2012). Other processes can lead to the formation of such eddies, depending on the location and the season.…”

Section: Introductionmentioning

confidence: 99%

Mesoscale eddies and submesoscale structures of Persian Gulf Water off the Omani coast in spring 2011

et al. 2016

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Seasonal overturning circulation in the Red Sea: 1. Model validation and summer circulation

Yao

Hoteit

Pratt

et al. 2014

J. Geophys. Res. Oceans

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The overturning circulation in the Red Sea exhibits a distinct seasonally reversing pattern and is studied using high-resolution MIT general circulation model simulations. In the first part of this study, the vertical and horizontal structure of the summer overturning circulation and its dynamical mechanisms are presented from the model results. The seasonal water exchange in the Strait of Bab el Mandeb is successfully simulated, and the structures of the intruding subsurface Gulf of Aden intermediate water are in good agreement with summer observations in 2011. The model results suggest that the summer overturning circulation is driven by the combined effect of the shoaling of the thermocline in the Gulf of Aden resulting from remote winds in the Arabian Sea and an upward surface slope from the Red Sea to the Gulf of Aden set up by local surface winds in the Red Sea. In addition, during late summer two processes associated, respectively, with latitudinally differential heating and increased salinity in the southern Red Sea act together to cause the reversal of the contrast of the vertical density structure and the cessation of the summer overturning circulation. Dynamically, the subsurface northward pressure gradient force is mainly balanced by vertical viscosity resulting from the vertical shear and boundary friction in the Strait of Bab el Mandeb. Unlike some previous studies, the three-layer summer exchange flows in the Strait of Bab el Mandeb do not appear to be hydraulically controlled.

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Mesoscale eddies in the Gulf of Aden and their impact on the spreading of Red Sea Outflow Water

Cited by 45 publications

References 62 publications

Mesoscale variability of water masses in the Arabian Sea as revealed by ARGO floats

Mesoscale variability of water masses in the Arabian Sea as revealed by ARGO floats

Mesoscale eddies and submesoscale structures of Persian Gulf Water off the Omani coast in spring 2011

Seasonal overturning circulation in the Red Sea: 1. Model validation and summer circulation

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