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Radiative transfer for inhomogeneous atmosphere: RRTM, a validated correlated-k model for the longwave.
The deal also crates aftermarket business opportunities relating to the existing fleet, Safran said earlier.Country: UKSector: Aerospace/DefenceTarget: RTM322 programme, Rolls-Royce-Turbomeca (RRTM) Buyer: Safran SA , Turbomeca Vendor: Rolls-Royce Holding PLCDeal size in USD: 387mType: DivestmentStatus: Closed
Clough, 1997: Radiative transfer for inhomogeneous atmosphere: RRTM, a validated correlated-k model for the longwave.
Skin firmness, the primary efficacy variable, was assessed at the start of the trial and after treatment for 28 days using a devise to measure shear wave propagation in the skin, Reviscometer RVM 600[R] (Courage + Khazaka Electronic, Cologne, Germany), for recording Resonance Running Time, RRTM, expressed in arbitrary time units.
The model configuration was the same as the highly tested University of Washington real-time WRF configuration, using WRF-ARW V3.7.1, Yonsei University (YSU) planetary boundary layer (PBL), Thompson microphysics, RRTM for GCMs (RRTMG) radiation, and the Noah land surface model with multiple parameterization options (Noah-MP), but with one exception: the number of vertical levels was increased from 38 to 75.
The radiation model was the RRTMG (rapid radiative transfer model for general circulations models) , which is a relatively recent version of the RRTM (rapid radiative transfer model) , with a better representation of cloudiness, unresolved by the mesh of the model.
Physical options Cumulus parameterization Grell 3D ensemble cumulus scheme Short-wave radiation RRTM scheme Long-wave radiation Dudhia scheme Surface layer physics Eta similarity Land surface processes Fractional sea-ice Planetary boundary layer Mellor-Yamada-Janjic scheme TABLE 2: Performance comparison between the WRF-SLFN and the four pdf-SLFN methods.
For type RRTM there has not been any improvement observed, and given the resource consumption, it should be considered whether or not to study its use depending on the specific application desired.
The transaction also includes the intellectual property rights related to the programme as well as Rolls-Royce's 50% stake in the Rolls-Royce-Turbomeca (RRTM) joint venture.
WRF version 3.2 Dynamical core Advanced Research core of the WRF (ARW) Horizontal resolution (km) 27, 9, 3, 1 Nesting method One way Vertical grid 42 sigma levels, 10-m spacing in the first 100 m Upper boundary (hPa) 50 Model topography SRTM Time step (s) 40,40, 13.33,4.44 Time period simulated 2010 calendar year Data save interval (min) 60 Lateral boundary condition 6-h operational analyses from the Global Forecast System Planetary boundary layer QNSE Surface layer Monin-Obukhov Solar radiation Rapid Radiative Transfer Model (RRTM) Longwave radiation RRTM Cloud microphysics WRF single moment (5 class) Convection scheme Kain-Fritsch (27- and 9-km grids only) Table 2.
Other physical schemes included a WRF SingleMoment 3-class (WSM3) scheme for microphysics; a Rapid Radiative Transfer Model (RRTM) for longwave radiation; a Dudhia scheme for shortwave radiation; and a Kain-Fritsch cumulus parameterization scheme.
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