Over het archief
Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.
Dit archief wordt uitgebouwd en beheerd volgens de principes van de Open Access Movement, en het daaruit ontstane Open Archives Initiative.
Basisinformatie over ‘Open Access to scholarly information'.
| one publication added to basket [395755] |
Widespread longitudinal snow dunes in Antarctica shaped by sintering
Poizat, M.; Picard, G.; Arnaud, L.; Narteau, C.; Amory, C.; Brun, F. (2024). Widespread longitudinal snow dunes in Antarctica shaped by sintering. Nature Geoscience 17(9): 889-895. https://dx.doi.org/10.1038/s41561-024-01506-1
In: Nature Geoscience. Nature Publishing Group: London. ISSN 1752-0894; e-ISSN 1752-0908, meer
|  |
| Auteurs | | Top |
- Poizat, M.
- Picard, G.
- Arnaud, L.
|
- Narteau, C.
- Amory, C., meer
- Brun, F.
|
|
| Abstract |
The surface of Antarctica is continuously shaped by erosion, blowing snow and deposition, resulting in diverse aeolian bedforms akin to those observed in subtropical sand deserts. However, although dunes are universally recognized as a climate and environmental proxy, the properties of snow dunes are not well understood. Here, using satellite images covering most of Antarctica, we report the widespread occurrence (>95% of the area studied) of linear dunes that are between 100 and 1,000 m in length and aligned with the local resultant snow drift direction (61% are longitudinal dunes). On the basis of sand dune theory, we suggest that these snow dunes grow by elongation, often under unidirectional wind regimes. The predominance of the elongating mode indicates a low availability of mobile snow particles. This limited availability prevails at the continental scale due to a subtle balance between snow sintering, which limits erosion, and strong winds, which rapidly remove snowfall. These characteristics result from specific meteorological conditions that distinguish Antarctica from other snow-covered regions, and may shift with future climate changes. We suggest that snow sintering not only influences Antarctic aeolian landform evolution but also regulates the amount of snow sublimated during transport, an uncertain term in the ice-sheet mass balance. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
