The importance of wind blown snow redistribution to snow accumulation on and mass balance of Bellingshausen Sea ice

Leonard, Katherine.C.; Maksym, Ted. 2011 The importance of wind blown snow redistribution to snow accumulation on and mass balance of Bellingshausen Sea ice. Annals of Glaciology, 52 (57). 271-278.

Before downloading, please read NORA policies.
[img] Text
s33.pdf - Published Version
Restricted to NORA staff only

Download (392kB) | Request a copy


Snow distribution is a dominating factor in sea-ice mass balance in the Bellingshausen Sea, Antarctica, through its roles in insulating the ice and contributing to snow-ice production. The wind has long been qualitatively recognized to influence the distribution of snow accumulation on sea ice, but the relative importance of drifting and blowing snow has not been quantified over Antarctic sea ice prior to this study. The presence and magnitude of drifting snow were monitored continuously along with wind speeds at two sites on an ice floe in the Bellingshausen Sea during the October 2007 Sea Ice Mass Balance in the Antarctic (SIMBA) experiment. Contemporaneous precipitation measurements collected on board the RVIB Nathaniel B. Palmer and accumulation measurements by automated ice massbalance buoys (IMBs) allow us to document the proportion of snowfall that accumulated on level ice surfaces in the presence of high winds and blowing-snow conditions. Accumulation on the sea ice during the experiment averaged <0.01mw.e. at both IMB sites, during a period when European Centre for Medium-Range Weather Forecasts analyses predicted >0.03mw.e. of precipitation on the ice floe. Accumulation changes on the ice floe were clearly associated with drifting snow and high winds. Drifting-snow transport during the SIMBA experiment was supply-limited. Using these results to inform a preliminary study using a blowing-snow model, we show that over the entire Southern Ocean approximately half of the precipitation over sea ice could be lost to leads.

Item Type: Publication - Article
Programmes: BAS Programmes > Polar Science for Planet Earth (2009 - ) > Climate
ISSN: 0260-3055
NORA Subject Terms: Glaciology
Earth Sciences
Date made live: 13 May 2011 11:32 +0 (UTC)

Actions (login required)

View Item View Item

Document Downloads

Downloads for past 30 days

Downloads per month over past year

More statistics for this item...