Canadas Three Oceans (C3O) Conductivity-Temperature-Depth (CTD) data taken from the Canadian Coast Guard Ship (CCGS) Sir Wilfrid Laurier, Southern Chukchi Sea, 2011

The Pacific sector of the Arctic Ocean is experiencing major reductions in seasonal sea ice extent and increases in sea surface temperatures. One of the key uncertainties in this region is how the marine ecosystem will respond to seasonal shifts in the timing of spring sea ice retreat and/or delays in fall sea ice formation. Variations in upper ocean water hydrography, planktonic production, pelagic-benthic coupling and sediment carbon cycling are all influenced by sea ice and temperature change. To more systematically track the broad biological response to sea ice retreat and associated environmental change, an international consortium of scientists have developed a coordinated Distributed Biological Observatory (DBO) that includes selected biological measurements at multiple trophic levels, along with satellite and mooring measurements. The DBO currently focuses on five regional biological hotspot locations along a latitudinal gradient that allows for consistent sampling and monitoring at five biologically productive locations across a latitudinal gradient: DBO 1 (SLIP)-south of St. Lawrence Island (SLI), DBO2 (Chirikov)-north of SLI, DBO3 (southern Chukchi Sea), DBO4-NE Chukchi Sea, and DBO5-Barrow Canyon. This data has been collected and submitted as part of the Distributed Biological Observatory (DBO) program. Data were originally collected as part of the Canada Three Oceans (C3O) project. Conductivity-Temperature-Depth (CTD) data were taken aboard the CCGS Sir Wilfrid Laurier. During this cruise, data were taken along the established repeat hydrography transects, DBO3 and DBO5. This submission contains data from DBO3. There are 8 cnv data files containing the following parameters: pressure, depth, temperature, conductivity, oxygen, fluorescence, practical salinity, density, and potential temperature.北冰洋太平洋扇区正经历季节性海冰范围的大幅缩减与海表温度的显著上升。该区域的核心不确定性之一，是海洋生态系统将如何响应春季海冰消融时间的季节性偏移，以及/或秋季海冰形成的延迟。上层海洋水文状况、浮游生物生产力、浮游-底栖耦合作用以及沉积物碳循环的变化，均受海冰与温度变化的影响。为更系统地追踪海冰消融及相关环境变化引发的全域生物响应，一支国际科学家联盟牵头构建了协同式分布式生物观测站（Distributed Biological Observatory, DBO），该观测站包含多营养级生物测量项目，同时配套卫星与锚系观测手段。目前DBO沿纬度梯度选定了5处区域生物热点站位，以实现跨纬度梯度的5个高生物生产力区域的标准化采样与监测：DBO 1（SLIP）——圣劳伦斯岛（St. Lawrence Island, SLI）以南海域；DBO 2（Chirikov）——圣劳伦斯岛以北海域；DBO 3（楚科奇海南部）；DBO 4——楚科奇海东北部海域；DBO 5——巴罗峡谷。 本数据集作为分布式生物观测站（DBO）项目的一部分完成采集与提交。其原始采集工作隶属于“加拿大三洋”（Canada Three Oceans, C3O）项目。导电率-温度-深度（Conductivity-Temperature-Depth, CTD）数据由CCGS Sir Wilfrid Laurier号科考船采集获取。本航次期间，数据沿预设的重复水文断面DBO 3与DBO 5开展采集。本次提交的数据仅包含DBO 3站位的相关观测数据。本次提交包含8个cnv格式数据文件，涵盖以下参数：压力、深度、温度、电导率、溶解氧、荧光强度、实用盐度、密度与位温。