AON: Continuing the Beaufort Gyre Observing System to Document and Enhance Understanding Environmental Change in the Arctic

该奖项是根据2009年《美国复苏和再投资法案》(公法111-5)资助的。该北极观测网络(AON)项目将在2009-2014年间进行始于2003年的Beaufort Gyre观测系统(BGOS)操作，以记录目前在Beaufort Gyre(BG)地区发生的史无前例的海冰和海洋参数变化。该项目将使用底部系泊和船上测量来测量温度、盐度、洋流、地球化学示踪剂、海冰吃水和海平面的时间序列。三个系泊设施将获得关于以下地点海水性质、海底压力和海冰吃水垂直分布变化的准确数据：75N和150W；78N和150W；以及77N和140W。覆盖整个BG的船基采样将与加拿大和日本的科学家合作进行，分担后勤费用，以加强全年的系泊测量。从2003年开始，将在140W、150W、~75N和~78N断面上的30个标准点使用船载CTD/ROSETTE测量和分析温度、盐度、氧气、营养物质、Ba2和Delta-18O，以提供长期的时间序列。提供更长时间尺度信息的样本，如氯氟化碳和四氯化碳、碱度、总二氧化碳、溶解无机碳和氚/3He的收集频率将会降低。在CTD/玫瑰花结铸模之间，将使用剖面深度为1100米的消耗型CTD，以提高温度和盐度场的空间分辨率。拟议的工作将与全日空的基本要素相协调，以加强观测活动的有效性和相互联系。

Abstract This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).This Arctic Observing Network (AON) project will conduct Beaufort Gyre Observational System (BGOS) operations begun in 2003 during 2009-2014 to document the unprecedented changes in sea ice and ocean parameters that are presently occurring in the Beaufort Gyre (BG) region. The project will measure time series of temperature, salinity, currents, geochemical tracers, sea ice draft, and sea level using bottom-tethered moorings and shipboard measurements. Three moorings will acquire precise data on the variations of the vertical distribution of seawater properties, bottom pressures and sea ice draft at sites: 75N and 150W; 78N and 150W; and 77N and 140W. Ship-based sampling covering the entire BG, will be performed in collaboration with scientists in Canada and Japan with shared logistics expenses, to augment the year-round mooring measurements. Temperature, salinity, oxygen, nutrients, barium and delta-18O will be measured and analyzed at 30 standard locations along 140W, 150W, ~ 75N and ~78N sections using shipboard CTD/rosette to provide long-term time series started in 2003. Samples that provide information on longer time-scales, such as CFCs and carbon tetrachloride, alkalinity, total CO2, dissolved inorganic carbon and tritium/3He, will be collected less frequently. Between CTD/rosette casts, expendable CTDs that profile to 1100 m depth will be used to increase spatial resolution of the temperature and salinity fields. The proposed work will be coordinated with the basic elements of AON to enhance effectiveness and interconnections of observational activities.