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| Titel |
The sensitivity of the atmospheric flow to Greenland in a case of extreme winds |
| VerfasserIn |
B. Tveita, H. Ólafsson, A. D. Sandvik, B. Hagen |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250029422
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| Zusammenfassung |
| A case of extreme northerly winds north of Iceland is detected by QuikSCAT and studied by numerical simulations. The study reveals:
• Extreme winds in northerly flow north of Iceland are linked to orographic damming of cold air east of Greenland. The damming extends almost all the way to N-Norway.
• Low level temperature gradients may also be enhanced by advection of warm air from the Greenland wake, SW of Iceland towards the cold blocked air east of Greenland.
• Greenland increases:
– the ageostrophic wind close to the barrier
– the geostrophic wind in agreement with the increased low level temperature gradient.
• Investigation of different forecasts of different lead-times indicates that it may be of great importance for the downstream development to simulate the cold air outflow at Cape Tobin accurately |
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