Application of an adaptive radiative transfer parameterisation in a mesoscale numerical weather prediction model. DWD Extramural research. Annika Schomburg 1) , Victor Venema 1) , Felix Ament 2) , Clemens Simmer 1) 1) Department of Meteorology, University of Bonn, Germany
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DWD Extramural research
Annika Schomburg1) , Victor Venema1), Felix Ament2), Clemens Simmer1)
1) Department of Meteorology, University of Bonn, Germany
2) University of Hamburg
Surface net flux
Atmospheric heating rate
Preliminary new results
in error fields of simplified computations
Schomburg, A., V. Venema, F. Ament, and C. Simmer. Application of an adaptive radiative transfer scheme in a mesoscale numerical weather prediction model. Quarterly Journal of the Royal Meteorological Society, accepted 2011.
Venema, V.K.C., A. Schomburg, F. Ament, and C. Simmer. Two adaptive radiative transfer schemes for numerical weather prediction models. Atmospheric Chemistry and Physics, 7, 5659-5674, doi: 10.5194/acp-7-5659-2007, 2007.
Errors in the solar heating rates (W m-2) in the LM at the surface for 12.30 h UTC.
(a) The two-stream calculation of the solar surface flux is the reference field
(b) Cloud cover of low clouds
(c) Total cloud cover
(d) the 1-h persistence assumption,
(e) the adaptive perturbation scheme,
(f) the adaptive search scheme. The corresponding errors are shown in the same order in the third row.
Grid points where…
fluxes with exact
estimator based on
radiation scheme for
each grid point
for surface fluxes
→ Multivariate linear regression
with different sets of predictors:
Implementation of adaptive scheme into LM
... in the same model run
The covariance functions of the errors in the solar (a) and infrared (b) fluxes at the surface.
with adaptive scheme smoother error curves
21 June 2004
Adaptive approach prevents „wavy“ structure of developing of variables with time