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| Titel |
Forcing at different spatial scales, leading to an extreme precipitation event in Central-Norway |
| VerfasserIn |
Birthe Marie Steensen, Haraldur Ólafsson, Marius Jonassen |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250041705
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| Zusammenfassung |
| An extreme precipitation event in Central-Norway is simulated, and the sensitivity of the precipitation to topography at different scales is explored.
Even though the event is extreme in terms of precipitation amounts, the synoptic-scale forcing described by quasi-geostrophic theory is only moderate.
The simulations reveal that most of the extreme precipitation is a result of forced ascent on a relatively small scale, embedded in close to stationary synoptic-scale flow. The topographic forcing is twofold: firstly, there is direct forcing as the flow impinges the topography. Secondly, the flow that impinges S-Norway is blocked and diverted towards Central-Norway, leading to greater wind speed and an enhancement of the direct forcing. |
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