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Snow density along the route traversed by the Japanese-Swedish Antarctic Expedition 2007/08
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2012 (English)In: Journal of Glaciology, ISSN 0022-1430, Vol. 58Article in journal (Refereed) Published
Abstract [en]

During the Japanese-Swedish Antarctic traverse expedition of 2007/08, we measured the surface snow density at 46 locations along the 2800 km long route from Syowa station to Wasa station in East Antarctica. The mean snow density for the upper 1 (or 0.5) m layer varied from 333 to 439 kg m(-3) over a region spanning an elevation range of 365-3800 m a.s.l. The density variations were associated with the elevation of the sampling sites; the density decreased as the elevation increased, moving from the coastal region inland. However, the density was relatively insensitive to the change in elevation along the ridge on the Antarctic plateau between Dome F and Kohnen stations. Because surface wind is weak in this region, irrespective of elevation, the wind speed was suggested to play a key role in the near-surface densification. The results of multiple regression performed on the density using meteorological variables were significantly improved by the inclusion of wind speed as a predictor. The regression analysis yielded a linear dependence between the density and the wind speed, with a coefficient of 13.5 kg m(-3) (m s(-1))(-1). This relationship is nearly three times stronger than a value previously computed from a dataset available in Antarctica. Our data indicate that the wind speed is more important to estimates of the surface snow density in Antarctica than has been previously assumed.

Place, publisher, year, edition, pages
2012. Vol. 58
Keyword [en]
dronning maud land surface mass-balance polar firn air east antarctica temporal variability dome fuji stake method accumulation densification model Physical Geography Geology
Research subject
SWEDARP 2007/08, JASE
Identifiers
URN: urn:nbn:se:polar:diva-1933DOI: 10.3189/2012JoG11J201OAI: oai:DiVA.org:polar-1933DiVA: diva2:810355
Note

ISI Document Delivery No.: 959KB Times Cited: 3 Cited Reference Count: 54 Sugiyama, Shin Enomoto, Hiroyuki Fujita, Shuji Fukui, Kotaro Nakazawa, Fumio Holmlund, Per Surdyk, Sylviane Sugiyama, Shin/C-2511-2012 National Institute of Polar Research, Tokyo; Swedish Polar Research Secretariat; Japanese Ministry of Education, Science, Sports and Culture [20241007] We thank the members of the Japanese-Swedish Antarctic Expedition 2007/08 for help in the field. The field activity was part of the 48th and 49th Japanese Antarctic Research Expedition, and was supported by the National Institute of Polar Research, Tokyo, and the Swedish Polar Research Secretariat. The wind-speed data, computed using a regional climate model, were kindly provided by J.T.M. Lenaerts and M.R. van den Broeke; we gratefully acknowledge their contribution. The surface elevation and 10 m snow temperature data were provided by the US National Snow and Ice Data Center. We thank two anonymous reviewers for comments on the manuscript, and the scientific editor, P. Bartelt. This study was funded by the Japanese Ministry of Education, Science, Sports and Culture, Grant-in-Aid for Scientific Research (A), 20241007, 2008-2010. 3 Int glaciol soc Cambridge Geography, Physical; Geosciences, Multidisciplinary

Available from: 2015-05-07 Created: 2015-05-06 Last updated: 2015-05-28

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