Dynamical studies of the Mersa Matruh Gyre: intense meander and ring formation events

Golnaraghi, Maryam

doi:10.1016/0967-0645(93)90069-y

Cited by 11 publications

(5 citation statements)

References 16 publications

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“…The Mersa–Matruh gyre, located at 28°30′–29°30′ E and 33–34° N, is one of the strongest sub-basin scale features in the Eastern Mediterranean (Golnaraghi 1993 ; Taupier-Letage 2008 ), here showing typical upper thermocline velocities on the order of 30 cms − 1 . The structure and strength of the gyre varies between the CTRL and TRAJ velocity fields (cf.…”

Section: Resultsmentioning

confidence: 89%

On the assessment of Argo float trajectory assimilation in the Mediterranean Forecasting System

et al. 2011

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The Mediterranean Forecasting System (MFS) has been operational for a decade, and is continuously providing forecasts and analyses for the region. These forecasts comprise local- and basin-scale information of the environmental state of the sea and can be useful for tracking oil spills and supporting search-and-rescue missions. Data assimilation is a widely used method to improve the forecast skill of operational models and, in this study, the three-dimensional variational (OceanVar) scheme has been extended to include Argo float trajectories, with the objective of constraining and ameliorating the numerical output primarily in terms of the intermediate velocity fields at 350 m depth. When adding new datasets, it is furthermore crucial to ensure that the extended OceanVar scheme does not decrease the performance of the assimilation of other observations, e.g., sea-level anomalies, temperature, and salinity. Numerical experiments were undertaken for a 3-year period (2005–2007), and it was concluded that the Argo float trajectory assimilation improves the quality of the forecasted trajectories with ~15%, thus, increasing the realism of the model. Furthermore, the MFS proved to maintain the forecast quality of the sea-surface height and mass fields after the extended assimilation scheme had been introduced. A comparison between the modeled velocity fields and independent surface drifter observations suggested that assimilating trajectories at intermediate depth could yield improved forecasts of the upper ocean currents.

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Section: Resultsmentioning

confidence: 89%

On the assessment of Argo float trajectory assimilation in the Mediterranean Forecasting System

et al. 2011

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“…The generation of such small transient cyclonic features close to the buoy area may explain the above described high frequency variability of 2-4 days duration. A similar mechanism of intense meandering and ring formation due to interaction between strong jets and mesoscale features has been described by GOLNARAGHI (1993) …”

Section: Discussionmentioning

confidence: 96%

“…A large part of the NE Aegean (south of the Dardanelles straits) is occupied by warm and saline waters since this area is influenced by the branch of Asia Minor that enters the Aegean Sea from the eastern straits transferring Levantine waters towards the north. The presence of such different water-masses creates strong temperature and , 1993, THEOCHARIS & GEORGOPOULOS 1993ZODIATIS, 1994, ZERVAKIS & GEORGOPOULOS, 2002.…”

Section: Discussionmentioning

confidence: 99%

Circulation and hydrological characteristics of the North Aegean Sea: a contribution from real-time buoy measurements

Nittis

Perivoliotis

2002

Medit. Mar. Sci.

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In the framework of the POSEIDON Project, a network of open sea oceanographic buoys equipped with meteorological and oceanographic sensors has been operational in the Aegean Sea since 1998. The analysis of upper-ocean physical data (currents at 3m, temperature and salinity at 3-40m depths) collected during the last 2 years from the stations of the North Aegean basin indicates a strong temporal variability of flow field and hydrological characteristics in both synoptic and seasonal time scales. The northern part of the basin is mainly influenced by the Black Sea Water outflow and the mesoscale variability of the corresponding thermohaline fronts, while the southern stations are influenced by the general circulation of the Aegean Sea with strong modulations caused by the seasonally varying atmospheric forcing.

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“…According to other studies, this feature is a permanent gyre called "Egypt gyre" (Said, 1984) or "Mersa-Matruh gyre" (Robinson et al, 1991;Tziperman and Malanotte-Rizzoli, 1991;Malanotte-Rizzoli and Bergamasco, 1991). Golnaraghi (1993) claims it is the strongest gyre in the eastern basin (up to 350 km in diameter) frequently interacting with the "MMJ". "Mersa-Matruh" is also described as a complex system composed of several mesoscale eddies (Özsoy et al, 1989;Horton et al, 1994;Ayoub, 1997) or as a meander of the "MMJ" (Larnicol et al, 2002).…”

Section: D) "Mersa-matruh"mentioning

confidence: 99%

The surface circulation in the eastern basin of the Mediterranean Sea

Hamad¹,

Millot²,

Taupier‐Letage³

2006

Sci. Mar.

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Dynamical studies of the Mersa Matruh Gyre: intense meander and ring formation events

Cited by 11 publications

References 16 publications

On the assessment of Argo float trajectory assimilation in the Mediterranean Forecasting System

On the assessment of Argo float trajectory assimilation in the Mediterranean Forecasting System

Circulation and hydrological characteristics of the North Aegean Sea: a contribution from real-time buoy measurements

The surface circulation in the eastern basin of the Mediterranean Sea

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