Comparison of seasonal sea-ice thickness change in the Transpolar Drift observed by local ice mass-balance observations and floe-scale EM surveys
Comparison of seasonal sea-ice thickness change in the Transpolar Drift observed by local ice mass-balance observations and floe-scale EM surveys
复制标题
通过当地冰质量平衡观测和浮冰规模电磁调查观测到的跨极漂移中季节性海冰厚度变化的比较
作者：
C. Haas;H. L. Goff;Samuel Audrain;D. Perovich;J. Haapala
摘要2007年5月至11月，利用冰质量平衡浮标和电磁感应（EM）探测，在北冰洋跨极漂移区的浮冰上进行了局部和横断面冰厚测量。重复EM调查沿着原来的2160米长的配置文件，包括水平和变形冰显示，6月至9月之间的模态和平均厚度分别减少了0.6和0.86米。模态厚度减小与同期在无积水冰上的一个位置由冰质量平衡浮标观测到的0.6m减薄非常一致，尽管当地观测没有捕捉到水平冰和粗糙冰的不同融化速率。文件讨论了在几个月的时间内维持这两种计量的方法和业务挑战，并得出结论认为，需要做更多的工作，以更好地了解其代表性。
Abstract Local and transect ice-thickness measurements were performed between May and November 2007 on an ice floe in the Transpolar Drift of the Arctic Ocean using an ice mass-balance buoy and electromagnetic induction (EM) sounding. Repeated EM surveys along an originally 2160m long profile including level and deformed ice showed that between June and September modal and mean thicknesses decreased by 0.6 and 0.86m respectively. the modal thickness decrease is in good agreement with the thinning of 0.6m observed by the ice mass-balance buoy at one location on unponded ice during the same period, although the local observations do not capture the different melt rates on level and rough ice. the paper discusses methodological and operational challenges in sustaining both measurements over periods of several months, and concludes that more work needs to be done to better understand their representativeness.