A novel experimental study of aeolian snow transport in Adelie Land (Antarctica)

None of the previous aeolian snow transport campaigns in Antarctica meet the requirements in terms of temporal resolution, long-term series and qualified instruments for evaluations of meteorological and climate models including parameterization for aeolian snow transport. Consequently, determining...

Full description

Bibliographic Details
Published in:Cold Regions Science and Technology
Main Authors: Trouvilliez, A., Naaim Bouvet, F., Genthon, C., Piard, L., Favier, V., Bellot, H., Agosta, C., Palerme, C., Amory, C., Gallée, H.
Other Authors: CNRS UMR 5183 LGGE SAINT MARTIN DHERES FRA, IRSTEA GRENOBLE UR ETGR FRA
Format: Article in Journal/Newspaper
Language:English
Published: 2014
Subjects:
Online Access:https://irsteadoc.irstea.fr/cemoa/PUB00043706
Description
Summary:None of the previous aeolian snow transport campaigns in Antarctica meet the requirements in terms of temporal resolution, long-term series and qualified instruments for evaluations of meteorological and climate models including parameterization for aeolian snow transport. Consequently, determining the quantity of snow transported remains a challenge. A field campaign was therefore launched in January 2009, in Adelie Land, Antarctica, to acquire new model-evaluation-oriented observations within the European ICE2SEA project, with the logistical support of the French polar Institute (IPEV). The available aeolian snow transport sensors are reviewed and the sensor that best suited our specific needs was chosen: FlowCapt (TM) acoustic sensors. Three automatic weather stations were deployed with FlowCapts (TM) close to the coast. The stations' locations are distinct, ranging from 1 to 100 km inland, one of them with a 7-m mast with six levels of anemometers and thermohygrometers. The fluid and impact threshold friction velocities recorded were 0.48 +/- 0.09 m s(-1) and 0.4 +/- 0.09 m s(-1), respectively, with a high standard deviation of 0.12 +/- 0.03 m s(-1) and 0.13 +/- 0.03 m s(-1), respectively. The aeolian snow transport frequency in Adelie Land was very high with seasonal variation of transport occurring with minima during the austral summer. Seven percent of the aeolian snow transport events were drifting snow (maximum particle's height, < 1 m above the surface). The snow quantity transported was above 1 kiloton per year in the first meter above the surface.