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| Titel |
Are gravity waves important for climate? |
| VerfasserIn |
Haraldur Ólafsson, Marius O. Jonassen, Olafur Rognvaldsson, Hálfdán Ágústsson |
| 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 |
250043367
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| Zusammenfassung |
| In stably stratified flow that impinges an obstacle, gravity waves are generated. In many parts of the world, the atmosphere is predominantly stably stratified and winds are persistent. Yet, gravity-wave dominated weather is considered to be an exception and gravity waves are generally not a part of the patterns described by wind climatology. This has been explained by the presence of surface friction in the real world, but friction has a destructive impact on gravity waves. Recent observations during FLOHOF over Hofsjokull glacier in Iceland and during the MOSO project in SW-Iceland as well as long-term numerical simulations of winds over glaciers in Iceland indicate that gravity waves are indeed a persistent feature of the low level wind climate in the real atmosphere. This may be related to the roughness being low over the ice and land with no trees. |
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