Physical/chemical and biological measurements of properties of sea ice and under-ice water collected near Barrow, AK in spring 2011 and 2012

The data file summarizes field observations of ice properties and constituents. All field observations of ice properties, snow, ice algae and under ice water in this study were conducted on landfast, first-year sea ice located within 10 km of Point Barrow, Alaska (71.38°, 156.48°) on the near-shore Beaufort and Chukchi Sea shelf (< 3 km from shore). Samples were collected May - early June 2011-2012 at a water depth of approximately 6-8 m. The stations selected were free of rubble and pressure ridges, decreasing the chance of contaminating debris from the shore and/or re-suspended sediment. During 2011, field work was conducted from May 3 to May 26. Stations were selected and sampled from a range of overlying snow depths (0 - 42 cm). The snow depth at each station was measured with a meter stick and snow depth was consistent (± 2 cm) within a radius of approximately 2 m. In 2012, four stations were sampled from May 15 to June 4 every 3 â 7 days. Stations were selected according to the initial snow depths. Station 1 started with 5 cm, Station 2 with 1.5 cm, Station 3 with 21 cm, and Station 4 with 30 cm.

本数据文件汇总了海冰特性与组成成分的野外实地观测结果。本研究中所有涉及海冰特性、积雪、冰藻及冰下水体的野外观测，均开展于阿拉斯加巴罗角（Point Barrow，71.38°，156.48°）周边10公里范围内的固定一年期海冰（landfast first-year sea ice）之上，采样区域位于距海岸不足3公里的近岸波弗特海（Beaufort Sea）与楚科奇海（Chukchi Sea）大陆架海域。采样工作于2011年至2012年的5月至6月初开展，采样水深约为6-8米。所选站位均无碎石堆积与压力冰脊（pressure ridges），以此降低海岸碎屑及再悬浮沉积物造成污染的可能性。2011年的野外作业时段为5月3日至5月26日，采样站位覆盖了0-42厘米的覆雪厚度区间。每处站位的积雪厚度采用米尺测量，且在约2米的半径范围内，积雪厚度偏差不超过±2厘米。2012年，研究团队于5月15日至6月4日期间，每隔3至7天对4处站位进行采样。站位选取依据初始积雪厚度确定：1号站位初始积雪厚度为5厘米，2号为1.5厘米，3号为21厘米，4号为30厘米。