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  • Springer  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Coupling an ocean wave model to an atmospheric general circulation model (1993)
    Springer
    Climate dynamics 9 (1993), S. 63-69 
    Details
    ISSN: 1432-0894
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract A coupled model, consisting of an ocean wave model and an atmospheric general circulation model (AGCM), is integrated under permanent July conditions. The wave model is forced by the AGCM wind stress, whereas the wind waves modify the AGCM surface fluxes of momentum, sensible and latent heat. We investigate the following aspects of the coupled model: how realistic are the wave fields, how strong is the coupling, and how sensitive is the atmospheric circulation to the spatially and temporally varying wave field. The wave climatology of the coupled model compares favorably with observational data. The interaction between the two models is largest (although weak) in the storm track in the Southern Hemisphere. Young windsea, which is associated with enhanced surface fluxes is generated mostly in the equatorward “frontal” area of an individual cyclone. However, the enhancement of the surface fluxes is too small to significantly modify the climatological mean atmospheric circulation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00210009
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The sensitivity of winter evaporation to the formulation of aerodynamic resistance in the ECMWF model (1994)
    Springer
    Boundary layer meteorology 71 (1994), S. 135-149 
    Details
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract In atmospheric models, the roughness length for momentum, heat and moisture are often taken equal, and tuned to the momentum budget problem. In this paper, it is shown that the roughness lengths have considerable impact on the evaporation in winter. One-column simulations of the land-surface scheme are driven with a long time series of observations for Cabauw in The Netherlands. It is shown that with the operational roughness lengths for this location (as in use at ECMWF in May 1993), evaporation in January, February and March is overestimated by more than a factor 2. More realistic parameters, as documented for this site, virtually eliminate the error. This study shows the importance of the surface roughness lengths in determining evaporation from wet surfaces. It also illustrates the strength of long observational time series in identifying model deficiencies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00709223
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    Paper (German National Licenses)
    Fulltext
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