World Library  

Add to Book Shelf
Flag as Inappropriate
Email this Book

Impact of Sla Assimilation in the Sicily Channel Regional Model: Model Skills and Mesoscale Features : Volume 9, Issue 2 (01/02/2012)

By Olita, A.

Click here to view

Book Id: WPLBN0003984171
Format Type: PDF Article :
File Size: Pages 22
Reproduction Date: 2015

Title: Impact of Sla Assimilation in the Sicily Channel Regional Model: Model Skills and Mesoscale Features : Volume 9, Issue 2 (01/02/2012)  
Author: Olita, A.
Volume: Vol. 9, Issue 2
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


APA MLA Chicago

Dobricic, S., Dufau, C., Ribotti, A., Fazioli, L., Olita, A., Sorgente, R., & Cucco, A. (2012). Impact of Sla Assimilation in the Sicily Channel Regional Model: Model Skills and Mesoscale Features : Volume 9, Issue 2 (01/02/2012). Retrieved from

Description: Consiglio Nazionale delle Ricerche – Istituto per l'Ambiente Marino Costiero, Loc. Sa Mardini, 09170 Oristano, Italy. The impact of the assimilation of MyOcean Sea Level Anomalies along track data on the analyses of the Sicily Channel Regional Model was studied. The numerical model has a resolution of 1/32° degrees and is capable to reproduce mesoscale and sub-mesoscale features. The impact of the SLA assimilation is studied by comparing a simulation (SIM, which does not assimilate data) with two analyses, AN0 and AN1, assimilating different reprocessing versions (V0 and V1) of the same set of Along Track altimetric measurements. The quality of the analyses was evaluated by computing RMSE of the misfits between analyses background and observations (sea level) before assimilation. A qualitative evaluation of the ability of the analyses to reproduce mesoscale structures is accomplished by comparing model results with Ocean Color and SST satellite data, able to detect such features on the ocean surface. CTD profiles allowed to evaluate the impact of the SLA assimilation along the water column. We found a significant improvement for AN1 solution in terms of SLA rmse in respect to SIM (the averaged RMSE of AN1 SLA misfits over 1.5 years is about 0.5 cm smaller than SIM) and a weaker improvement in respect to the assimilation of the V0 dataset (0.1 cm average over the same period). Comparison with CTD data shows a questionable improvement produced by the assimilation process in terms of vertical features: AN1 is better in temperature while for salinity it get worse than SIM at the surface. The qualitative comparison of simulation and analyses with synoptic satellite independent data proves that SLA assimilation of V1 data allows to correctly reproduce some dynamical features (above all the circulation in the Ionian portion of the domain) and mesoscale structures otherwise misplaced or neglected both by SIM and AN0.

Impact of SLA assimilation in the Sicily Channel Regional Model: model skills and mesoscale features

Auclair, F., Marsaleix, P., and Estournel, C.: Sigma Coordinate Pressure Gradient Errors: Evaluation and Reduction by an Inverse Method, J. Atmos. Oceanic Technol., 17, 1348–1367, 2000.; Castellari, S., Pinardi, N., and Leaman, K.: A model study of air-sea interaction in the Mediterranean Sea, J. Marine Syst., 18, 89–114, 1998.; Blumberg, A. and Mellor, G.: A description of a three-dimensional coastal ocean circulation model, Coastal Estuarine Science, edited by: Heaps, N. S., Americ. Geophys. Union, Three-dimensional Coastal Ocean Models, 1–16, 1987.; Dobricic, S. and Pinardi, N.: An oceanographic three-dimensional variational data assimilation scheme, Ocean Modelling, 22, 89–105, doi:10.1016/j.ocemod.2008.01.004, 2008.; Dobricic, S., Pinardi, N., Adani, M., Tonani, M., Fratianni, C., Bonazzi, A., and Fernandez, V.: Daily oceanographic analyses by Mediterranean Forecasting System at the basin scale, Ocean Sci., 3, 149–157, doi:10.5194/os-3-149-2007, 2007.; Gaberšek, S., Sorgente, R., Natale, S., Ribotti, A., Olita, A., Astraldi, M., and Borghini, M.: The Sicily Channel Regional Model forecasting system: initial boundary conditions sensitivity and case study evaluation, Ocean Sci., 3, 31–41, doi:10.5194/os-3-31-2007, 2007.; Manzella, G. M. R., Gasparini, G. P., and Astraldi, M.: Water exchange between the eastern and western Mediterranean through the Strait of Sicily, Deep-Sea Res., 35, 1021–1035, 1988.; Mellor, G. L. and Yamada, T.: Development of a turbulence closure submodel for geophysical fluid problems, Rev. Geophys. Space Phys., 20, 851–875, 1982.; Millot, C. and Taupier-Letage, I.: Additional evidence of LIW entrainment across the Algerian subbasin by mesoscale eddies and not by a permanent westward flow, Progress in Oceanography, 66, 231–250, doi:10.1016/j.pocean.2004.03.002, 2005.; Olita, A., Sorgente, R., Natale, S., Gaberšek, S., Ribotti, A., Bonanno, A., and Patti, B.: Effects of the 2003 European heatwave on the Central Mediterranean Sea: surface fluxes and the dynamical response, Ocean Sci., 3, 273–289, doi:10.5194/os-3-273-2007, 2007.; Pujol, M.-I., Dobricic, S., Pinardi, N., and Adani, M.: Impact of Multialtimeter Sea Level Assimilation in the Mediterranean Forecasting Model, J. Atmos. Oceanic Technol., 27, 2065–2082, doi:10.1175/2010JTECHO715.1, 2010.; Robinson, A. R., Sellschopp, J., Warn-Varnas, A., Anderson, L. A., and Lermusiaux, P. F. J.: The Atlantic Ionian Stream, J. Marine System, 20, 129–156, 1999.; Smagorinsky, J.: Large eddy simulations of complex engineering and geophysical flows, edited by: Galperin, B. and Orszag, S., 1993.; Sorgente, R., Drago, A. F., and Ribotti, A.: Seasonal variability in the Central Mediterranean Sea circulation, Ann. Geophys., 21, 299–322, doi:10.5194/angeo-21-299-2003, 2003.; Sorgente, R., Olita, A., Oddo, P., Fazioli, L., and Ribotti, A.: Numerical simulation and decomposition of kinetic energy in the Central Mediterranean: insight on mesoscale circulation and energy conversion, Ocean Sci., 7, 503–519, doi:10.5194/os-7-503-2011, 2011.; Tonani, M., Pinardi, N., Fratianni, C., Pistoia, J., Dobricic, S., Pensieri, S., de Alfonso, M., and Nittis, K.: Mediterranean Forecasting System: forecast and analysis assessment through skill scores, Ocean Sci., 5, 649–660, doi:10.5194/os-5-649-2009, 2009.


Click To View

Additional Books

  • Distributions of Mixed Layer Properties ... (by )
  • Sea Surface Height and Mixed Layer Depth... (by )
  • Transit and Residence Times in the Adria... (by )
  • Investigation of Suitable Sites for Wave... (by )
  • Laminae Type and Possible Mechanisms for... (by )
  • Modeling Long-term Changes of the Black ... (by )
  • Impact of Hydrographic Data Assimilation... (by )
  • A Century of Sea Level Data and the Uk's... (by )
  • Freshwater Components and Transports in ... (by )
  • The 2011 Marine Heat Wave Off Southwest ... (by )
  • Modelling Survival and Connectivity of M... (by )
  • Corrigendum to Observed and Simulated Es... (by )
Scroll Left
Scroll Right


Copyright © World Library Foundation. All rights reserved. eBooks from Hawaii eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.