Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/5803
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dc.contributor.authorallStorto, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italiaen
dc.contributor.authorallDobricic, S.; Centro Euro-Mediterraneo per i Cambiamenti Climatici, Bologna, Italyen
dc.contributor.authorallMasina, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italiaen
dc.contributor.authorallDi Pietro, P.en
dc.date.accessioned2010-01-22T14:00:48Zen
dc.date.available2010-01-22T14:00:48Zen
dc.date.issued2009-10-05en
dc.identifier.urihttp://hdl.handle.net/2122/5803en
dc.description.abstractThe study of global climatological trends requires the accurate analysis surface and sub-surface ocean state. In the last two decades, altimetric satellite missions have been launched with the aim of monitoring the sea level height variability, in time and space. This information may in turn be used, within data assimilation systems, for adjusting the column-integrated density fields in synergy with in-situ observations. The impact of the Sea Level Anomaly (SLA) data has been recently proved positive in many regional and global data assimilation system. However, gaining a positive impact from altimetric data needs i) the establishment of a correct strategy for updating temperature and salinity fields accordingly; ii) the correct assessment of the Mean Dynamic Topography to add to the anomaly data; iii) the consistency between the scales represented by the SLA data and those resolved by the ocean model. At the National Institute for Geophysics and Volcanology (INGV) and the Euro-Mediterranean Centre for Climate Change (CMCC), the former reduced-rank Optimal Interpolation (OI) analysis system (Bellucci et al., 2007) was used to produce ocean reanalysis for the last four decades. It has recently been replaced with a three-dimensional variational data assimilation system, which uses a First Guess at appropriate Time (FGAT) algorithm. The 3DVAR/FGAT formulation is adapted from the one operationally used for producing daily analysis in the Mediterranean basin (Dobricic et al., 2008), and is able to successfully assimilate satellite sea-level anomaly observations.en
dc.language.isoEnglishen
dc.relation.ispartof5th WMO Symposium on Data Assimilationen
dc.subjectocean modellingen
dc.subjectdata assimilationen
dc.subjectreanalysisen
dc.subjectupper ocean variabilityen
dc.subjectsea level heighten
dc.subjecttemperatureen
dc.subjectsalinityen
dc.titleGlobal oceanographic variational data assimilation of in-situ observations and space-borne altimeter data for reanalysis applicationsen
dc.typeExtended abstracten
dc.description.statusUnpublisheden
dc.subject.INGV03. Hydrosphere::03.01. General::03.01.04. Ocean data assimilation and reanalysisen
dc.description.ConferenceLocationMelbourne, Australiaen
dc.relation.referencesBellucci, A., S. Masina, P. Di Pietro, and A. Navarra, 2007: Using temperature–salinity relations in a Global Ocean implementation of a multivariate data assimilation scheme. Mon. Wea. Rev.,135, 3785–3807. Cooper, M. and K. Haines, 1996: Altimetric assimilation with water property conservation. J. Geophys. Res., 101, 1059–1077. Dobricic, S., 2005: New mean dynamic topography of the Mediterranean calculated from assimilation system diagnostics. Geophys. Res. Lett., 32, L11606. Dobricic, S. and N. Pinardi, 2008: An oceanographic three-dimensional assimilation scheme. Ocean Modelling, 22, 89–105. Dobricic, S., N. Pinardi, M. Adani, C. Fratianni, A. Bonazzi, and V. Fernandez, 2008: Daily oceanographic analyses by the Mediterranean basin scale assimilation system. Ocean Science, 3, 149–157. Hayden, C. M. and R. J. Purser, 1995: Recursive filter objective analysis of meteorological fields: Applications to NESDIS operational processing. J. Appl. Meteor., 34, 3–15. Le Traon, P., F. Nadal, and N. Ducet, 1998: An improved mapping method of multi-satellite altimeter data. J. Atmos. Ocean. Technol., 15 , 522–534. Madec, G., P. Delecluse, M. Imbard, and C. Levy, 1998: OPA 8.1 Ocean General Circulation Model reference manual. Note du pole de modélisation no 11, Institut Pierre-Simon Laplace. Pp. 91. Rio, M. H. and F. Hernandez, 2004: A mean dynamic topography computed over the world ocean from altimetry, in-situ measurements and a geoid model. J. Geophys. Res., 109, C12032. Roullet, G. and G. Madec, 2000: Salt conservation, free surface, and varying levels: a new formulation for ocean general circulation models. J. Geophys. Res., 105, 23927–23942. Vidard, A., M. Balmaseda, and D. Anderson, 2009: Assimilation of altimeter data in the ECMWF Ocean Analysis System 3. Mon. Wea. Rev., 137, 1393–1408. Wijffels, S. E., J. Willis, C. M. Domingues, P. Barker, N. J. White, A. Gronell, K. Ridgway, and C. J. A., 2008: Changing expendable bathythermograph fall rates and their impact on estimates of thermosteric sea level rise. J. Climate, 21, 5657–5672.en
dc.description.obiettivoSpecifico3.7. Dinamica del clima e dell'oceanoen
dc.description.fulltextopenen
dc.contributor.authorStorto, A.en
dc.contributor.authorDobricic, S.en
dc.contributor.authorMasina, S.en
dc.contributor.authorDi Pietro, P.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italiaen
dc.contributor.departmentCentro Euro-Mediterraneo per i Cambiamenti Climatici, Bologna, Italyen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italiaen
item.openairetypeExtended abstract-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptCNR-Ismar-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia-
crisitem.author.orcid0000-0001-6273-7065-
crisitem.author.orcid0000-0002-4068-1256-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent03. Hydrosphere-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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