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  • 标题:Wind-blown flux rates derived from drifts at arctic snow fences
  • 本地全文:下载
  • 作者:Matthew Sturm ; Svetlana Stuefer
  • 期刊名称:Journal of Glaciology
  • 印刷版ISSN:0022-1430
  • 电子版ISSN:1727-5652
  • 出版年度:2013
  • 卷号:59
  • 期号:213
  • 页码:21-34
  • DOI:10.3189/2013JoG12J110
  • 出版社:Cambridge University Press
  • 摘要:Historically, there has been considerable interest in establishing the relationship between wind-blown snow flux ( Q ) and wind speed. By monitoring the drift growth at snow fences in Arctic Alaska during three winters, we computed Q for 36 distinct transport events. Each fence was instrumented with depth sounders to measure deposition rates. The majority of events (31) occurred between November and February, despite winter extending from October to June. On average, five substantial snow deposition events (SDEs) occurred at each fence per winter. The mean flux during SDEs was 0.16, 0.19 and 0.29 kg s −1 m −1 at Barrow, Imnavait Creek and Franklin Bluffs, respectively, the differences in Q explained by the different wind regimes at the three sites. To place these flux measurements in perspective, we reviewed all previous experimental values of Q , with special attention to height and time over which the fluxes were measured. The new data help fill a range of wind speeds (12–18 m s −1 ) where prior results have been sparse. Combined, the full data define a diffuse cloud best represented by upper and lower bounding equations Q U = 1.3 × 10 −3 w 2.5 and Q L = 3.3 × 10 −9 w 6.55 m s −1 ). We suggest that these bounds, rather than a single equation, provide the best way to estimate snow fluxes.
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