2008
DOI: 10.1175/2008mwr2590.1
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A Reduced Radiation Grid for the ECMWF Integrated Forecasting System

Abstract: A specific interface between the radiation transfer calculations and the rest of the ECMWF model was introduced in 2003, potentially providing substantial economy in computer time by reducing the spatial resolution at which radiation transfer is evaluated, without incurring some of the deficiencies produced by the sampling strategy previously used in the ECMWF model. The introduction of a new more-computerintensive radiation package (McRad) in June 2007 has led to a differentiated use of this interface dependi… Show more

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Cited by 48 publications
(41 citation statements)
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“…Further, many NWP models still apply relatively simple radiation schemes, but in conditions of stable stratification the turbulent fluxes are small and the relative importance of radiative fluxes on T2m accordingly increases, suggesting the use of more sophisticated schemes, such as Morcrette et al (2008b) applied in IFS. The main challenges remain, however, in the ABL scheme.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…Further, many NWP models still apply relatively simple radiation schemes, but in conditions of stable stratification the turbulent fluxes are small and the relative importance of radiative fluxes on T2m accordingly increases, suggesting the use of more sophisticated schemes, such as Morcrette et al (2008b) applied in IFS. The main challenges remain, however, in the ABL scheme.…”
Section: Discussionmentioning
confidence: 99%
“…Savijärvi, 1990) or by full integration schemes with coarse horizontal and/or time resolutions (e.g. Morcrette et al, 2008b). These simplifications impose inaccuracies in calculation of the long-wave radiation and turbulent fluxes.…”
Section: Introductionmentioning
confidence: 99%
“…This is a relatively expensive component of the atmospheric physics, and is usually run at a much coarser time step than the rest of the atmosphere (temporal subsampling), purely for expediency rather than any physical justification. Other approaches to reducing the computational burden of radiative transfer include subsampling in the spectral domain (Pincus and Stevens, 2009;Bozzo et al, 2014) or in the spatial as well as the temporal domain (Morcrette, 2000;Morcrette et al, 2008). Some of these methods have been shown to be effective over short timescales (e.g., numerical weather prediction and medium-range forecasting) but contribute to model bias V. Balaji et al: Coarse-grained component concurrency 3607 over climate timescales.…”
Section: Balaji Et Al: Coarse-grained Component Concurrencymentioning
confidence: 99%
“…To reduce the cost further, calculations are usually made at lower temporal and spatial resolutions (e.g. Morcrette et al, 2008). Quite drastic reductions in temporal resolution are often made (e.g.…”
Section: Introductionmentioning
confidence: 99%