Nutrient, oxygen 18/16 ratio, and chlorophyll data measured from water samples collected aboard the Sir Wilfred Laurier, Bering and Chukchi Seas, 2015

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. Note: This is version 2 of the data. Version 1 is available at the following links: Metadata: https://arcticdata.io/catalog/#view/urn:uuid:7039fe5d-a649-4147-af66-f45eac53738d Data File: https://cn.dataone.org/cn/v2/resolve/arctic-data.9443.1 Data Readme: https://cn.dataone.org/cn/v2/resolve/arctic-data.9444.1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上升。该区域的关键不确定性之一，是海洋生态系统将如何响应春季海冰消退时间的季节性偏移，以及秋季海冰形成的延迟。上层海洋水文、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退及相关环境变化引发的全域生物响应，一支国际科学家合作团队搭建了协同式分布式生物观测站（Distributed Biological Observatory, DBO），该观测站涵盖多营养级的选定生物测量项目，同时配套卫星与锚系测量手段。目前，DBO聚焦沿纬度梯度分布的5处区域生物“热点”位点，可在跨纬度梯度的5个高生物生产力位点开展标准化采样与监测：DBO 1（SLIP）——圣劳伦斯岛（St. Lawrence Island, SLI）以南区域；DBO 2（奇里科夫）——圣劳伦斯岛以北区域；DBO 3（楚科奇海南部）；DBO 4——楚科奇海东北区域；DBO 5——巴罗峡谷。注：本数据集为版本2。版本1可通过以下链接获取：元数据：https://arcticdata.io/catalog/#view/urn:uuid:7039fe5d-a649-4147-af66-f45eac53738d；数据文件：https://cn.dataone.org/cn/v2/resolve/arctic-data.9443.1；数据说明文档：https://cn.dataone.org/cn/v2/resolve/arctic-data.9444.1