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DIVA software
DIVA〔(DIVA homepage )〕 (Data-Interpolating Variational Analysis) allows the spatial interpolation/gridding of data (''analysis'') in an optimal way, comparable to optimal interpolation (OI), taking into account uncertainties on observations. In comparison to standard OI, used in Data assimilation, DIVA, when applied to ocean data, takes into account coastlines, sub-basins and advection because of its variational formulation on the real domain.〔(DIVA formulation )〕 Calculations are highly optimized and rely on a finite element resolution. Tools to generate the finite element mesh are provided as well as tools to optimize the parameters of the analysis. Quality control of data can be performed and error fields can be calculated.〔Troupin, C, Barth, A, Sirjacobs, D, Ouberdous, M, Brankart, J.-M, Brasseur, P, Rixen, M, Alvera Azcarate, A, Belounis, M, Capet, A, Lenartz, F, Toussaint, M.-E, & Beckers, J.-M. (2012). Generation of analysis and consistent error fields using the Data Interpolating Variational Analysis (Diva). Ocean Modelling, 52-53, 90-101. doi:10.1016/j.ocemod.2012.05.002〕 Also detrending of data is possible. Finally 3D and 4D extensions are included with emphasis on direct computations of climatologies from (ODV )〔(ODV homepage )〕 spreadsheet files.
The software whose first version was available since 1996,〔Brasseur, P., Beckers, J.-M., Brankart, J.-M., and Schoenauen, R. (1996a). Seasonal temperature and salinity fields in the Mediterranean Sea: Climatological analyses of an historical data set. Deep-Sea Research, 43(2):159-192.()〕 can now be downloaded at the (DIVA ) site and is the reference tool for calculating climatologies within the SeaDataNet projects. It has also been included as the state-of-the art gridding method in Ocean Data View.
== Notes and references ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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