A nested pre-operational model for the Egyptian shelf zone: Model configuration and validation/calibration |
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| Institution: | 1. Oceanography Department, Faculty of Science University of Alexandria, Egypt;2. Department of Physics and Astronomy, Alma Mater Studiorum University of Bologna, Bologna, Italy;3. Centro EuroMediterraneo sui Cambiamenti Climatici, Bologna, Italy;4. CMRE, Centre for Maritime Research and Experimentation, La Spezia, Italy;1. Department of Geosciences, Tel Aviv University, Tel Aviv, Israel;2. Department of Meteorology and Atmospheric Science, Pennsylvania State University, University Park, PA, USA;3. German Remote Sensing Data Center – German Aerospace Center (DLR), Oberpfaffenhofen, Germany;4. Institute of Physics, University of Augsburg, Germany;5. National Institute of Geophysics and Volcanology (I.N.G.V.), Osservatorio Etneo, Section of Catania, Catania, Italy;1. Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA 90095, USA;2. Environmental Science and Engineering, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125, USA;1. Key Laboratory of Meteorological Disaster of Ministry of Education (KLME)/Joint International Research Laboratory of Climate and Environment Change (ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), College of Atmospheric Science, Nanjing University of Information Science and Technology, Nanjing, 210044, China;2. Earth System Modeling Center, College of Atmospheric Science, Nanjing University of Information Science and Technology, Nanjing, 210044, China;3. China-US joint Atmosphere-Ocean Research Center and International Pacific Research Center, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, Honolulu, Hawaii, 96822, USA;1. Earth System Research Division, National Institute of Meteorological Sciences, Korea;2. Department of Earth and Marine Science, College of Ocean Sciences, Jeju National University, Korea |
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| Abstract: | We explored the variability of the Egyptian shelf zone circulation connected to atmospheric forcing by means of a numerical simulation of the general circulation. A high resolution model grid was used at 1/60° horizontal resolution and 25 sigma layers. The simulation was carried out using the most recent version of the Princeton Ocean Model (POM). The initialised model was run the whole year of 2006 using the analysis forcing data for the same year obtained from ECMWF and MFS (Mediterranean Forecasting System, Pinardi et al., 2003). The model skills were evaluated by means of the root mean square error (RMSE) and correlations. The Egyptian Shelf Model (EGYSHM) simulation suggests the presence of an Egyptian Shelf Slope Current (ESSC), which is flowing eastward at different depths in the domain. We found that the maximum velocity of the ESSC 0.25 m/s] is located near the continental slope during the summer time, while in winter the velocity of ESSC is weaker 0.12 m/s] in the same location. The ESSC appears to be directly affected by Mersa-Matruh gyre system. EGYSHM reproduced the main region circulation patterns, especially after adding the Nile River outflow. We found that wind stress is crucial to force the circulation of the Egyptian shelf zone. EGYSHM SST was significantly correlated to satellite SST in all months at a 95% confidence limit, with a maximum of 0.9743 which was obtained in May 2006. The RMSE between EGYSHM and Argo floats salinity data was about 0.09. We compared our results with satellite altimetry to verify the positions and shapes of mesoscale features. |
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| Keywords: | Egyptian shelf model Nile river Argo floats SST data Mesoscale features |
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