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Mediterranean Forecasting System: An improved assimilation scheme for sea-level anomaly and its validation

TitoloMediterranean Forecasting System: An improved assimilation scheme for sea-level anomaly and its validation
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2005
AutoriDobricic, S., Pinardi N., Adani Mario, Bonazzi A., Fratianni C., and Tonani M.
RivistaQuarterly Journal of the Royal Meteorological Society
Volume131
Paginazione3627-3642
ISSN00359009
Parole chiaveAccuracy of analysis, Assimilation system diagnostics, Barotropic, data assimilation, Data processing, Empirical orthogonal function, Error correlation, Forecast systems, Forecasting, Fourier analysis, In-situ data, Mediterranean forecasting system, Nanofluidics, Oceanography, Operational oceanography, Operational schemes, Optimal interpolation, Physical oceanography, Sea level anomaly, Streamfunctions, Time and space, Time-scales, Vertical modes
Abstract

The assimilation of satellite and in situ data in the Mediterranean Forecast System (MFS) is based on an optimal interpolation scheme which uses empirical orthogonal functions (EOFs) to represent vertical modes of the background-error correlation matrix. In this study we present a new methodology to estimate, and the calculation of, these multivariate EOFs. The new EOFs are considered time and space varying (seasonal time-scales and subregional). They examine the vertical-error cross-variance between temperature, salinity, barotropic stream function and sea-level anomaly. These EOFs are used to assimilate four years of along-track sea-level anomaly data. The validation of MFS analyses and forecasts using the assimilation system diagnostics and the comparison with independent observations show that, in relation to an old operational scheme which was using only one EOF, the use of several multivariate EOFs significantly improves the accuracy of analyses and forecasts in the Mediterranean. © Royal Meteorological Society, 2005.

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cited By 21

URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-33947121194&doi=10.1256%2fqj.05.100&partnerID=40&md5=14e635cb92e03331179af434273947b6
DOI10.1256/qj.05.100
Citation KeyDobricic20053627