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A comparison of circulation statistics based on FGGE level III-B analyses produced by GFDL and ECMWF for the special observing periods
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1984
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Series: NOAA Data Report ERL GFDL ; 6
[PDF-483.96 MB]
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Description:GFDL (Geophysical Fluid Dynamics Laboratory) and ECMWF (European Centre for Medium Range Weather Forecasts) have both been designated as official data producers of Level III-B global analyses for FGGE (First GARP Global Experiment). The data assimilation schemes used in the two centers are described in detail by Ploshay et al. (1983) for the GFDL system, and by Bengtsson et al. (1982) for the ECMWF system. Essential differences between the two systems are summarized in Table 1. The daily global analyses of selected meteorological fields for the entire FGGE year (December 1978 through November 1979) are also presented in data reports (see Ploshay et al., 1983, for the GFDL set; and Bjorheim et al., 1981, for the ECMWF set). In the present report, an attempt is made to assess the extent to which differences in various stages of the data handling procedures adopted by the two centers, such as those pertaining to data input, quality control, data insertion, model structure, assimilation and initialization, affect the final analyses.
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Rights Information:CC0 Public Domain
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