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• W3107781719 abstract "Abstract The study tests and further develops a previously presented method for adjusting initial clouds in the HARMONIE mesoscale numerical weather prediction (NWP) model. The method uses satellite‐observed cloud properties from the Nowcasting and very short range forecasting Satellite Application Facility (NWCSAF) together with ground‐based synoptic stations (SYNOP) observations, adjusting the humidity profile of the model based on the available cloud information with the overall aim to improve the forecast, in particular as regards clouds and solar radiation. A reference set‐up of the HARMONIE model is used as a baseline against which the cloud initialization experiments are compared. All HARMONIE experiments are run for July 2016, with a model run starting at 06Z each day. The HARMONIE outputs are compared with cloud fraction and solar radiation observations from ground‐based stations, while satellite cloud observations are also used for inspecting the behaviour of the forecasts. The performance of other generally used verification parameters is also studied. The results as regards clouds are encouraging. Symmetrical extremal dependence index (SEDI) skill scores show improvement in initial cloud conditions in 84% and 74% of the cases, when evaluated for cloud‐free (0–1 octas) and cloudy conditions (7–8 octas), respectively. The improvement lasts 2–4 hr into the forecast. Other parameters, however, show somewhat degraded skill as compared with the reference model run, while for solar radiation, the cloud initialization scheme exhibits somewhat ambiguous results. The distribution of solar radiation values is improved for relatively sunny conditions, while at the other end of the distribution, the cloud initialization scheme produces too many cases with relatively strongly attenuated radiation." @default.
• W3107781719 created "2020-12-07" @default.
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• W3107781719 date "2020-11-01" @default.
• W3107781719 modified "2023-10-18" @default.
• W3107781719 title "The use of satellite and surface observations for initializing clouds in the <scp>HARMONIE NWP</scp> model" @default.
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• W3107781719 doi "https://doi.org/10.1002/met.1965" @default.
• W3107781719 hasPublicationYear "2020" @default.
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