Zooplankton Abundances from near Point Barrow Alaska, August and September 2007

The Arctic Ocean ecosystem may respond dramatically to climate change through modification of the physical environment (e.g., hydrography and ice cover). A better understanding of the coupled biological-physical ocean ecosystem, and its interannual variability, is necessary to predict and understand these potential impacts of climate change on the Arctic ecosystem. The Chukchi-Beaufort Sea region near Barrow, Alaska, including coastal waters, has been identified as key because it lies at the junction of several ocean regions and is downstream of the Pacific Arctic gateway and hence is influenced physically and ecologically by input from the northern Bering Sea through Bering Strait. Furthermore, the shelf near Point Barrow is a known feeding hotspot for bowhead whales during their fall migration from the Canadian Arctic to the Bering Sea. To address interannual variability in ocean conditions and the formation of the fall bowhead whale feeding hotspot, oceanographic sampling in the Chukchi and near-shore Beaufort Seas was conducted annually using boat-based surveys during August-September 2005-2015 as part of multiple research programs. This data set contains the mesozooplankton abundances from plankton tows conducted at stations on the Chukchi and Beaufort Shelves and in Barrow Canyon, Alaska, during August and September of 2007. See the file ZooplanktonMethods_2007.txt and the on-line information for a description the sampling and analysis methods. Two data files are included: one in Microsoft Excel (.xls) format and the second in ASCII (.txt) format.北极海洋生态系统可通过物理环境改造（如水文状况与冰盖覆盖）对气候变化产生剧烈响应。深入理解耦合生物-物理海洋生态系统及其年际变率，乃是预测、解析气候变化对北极生态系统潜在影响的必要前提。阿拉斯加巴罗附近的楚科奇-博福特海区域（涵盖近岸水域）已被认定为关键研究区域，因其地处多个大洋区域的交汇点，且位于太平洋北极通道的下游，故而在物理与生态层面均受到经白令海峡输入的北白令海物质的影响。此外，巴罗角附近的陆架区域是弓头鲸在从加拿大北极地区前往白令海的秋季洄游过程中的已知觅食热点。为探究海洋状况的年际变率与秋季弓头鲸觅食热点的形成机制，作为多项研究计划的组成部分，研究团队于2005至2015年每年8-9月开展船基调查，对楚科奇海及近岸博福特海进行海洋学采样。本数据集收录了2007年8-9月期间，在阿拉斯加楚科奇海、博福特陆架及巴罗峡谷各站位通过浮游生物拖网（plankton tows）获取的中型浮游动物（mesozooplankton）丰度数据。采样与分析方法详见ZooplanktonMethods_2007.txt文件及在线补充资料。本数据集包含两份数据文件：一份为Microsoft Excel（.xls）格式，另一份为ASCII（.txt）格式。