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| Titel |
Assimilation of radar precipitation in the DMI-HIRLAM now-casting system - initial results |
| VerfasserIn |
Ulrik Korsholm, Claus Petersen |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250075871
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| Zusammenfassung |
| The pre-operational DMI now-casting system provides rapid update cycles with new forecasts every hour. Each forecast is initialized by three-dimensional variational and surface assimilation while radar precipitation and satellite derived cloud cover and cloud-top height are nudged every 10 and 15 minutes. For non-precipitating clouds nudging of temperature, humidity and cloud condensate are performed while for precipitating clouds nudging of precipitation is also included in the first two hours of each forecast. Precipitation nudging is based on a dynamical adjustment scheme of the wind field. The poster displays the general methodology and shows new results from system output. |
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