USGS Arctic Ocean Carbon Cruise 2010: Discrete Lab data

Models project the Arctic Ocean will become undersaturated with respect to carbonate minerals in the next decade. Recent field results indicate parts may already be undersaturated in late summer months, when ice melt is at its greatest extent. However, few comprehensive datasets of carbonate system parameters in the Arctic Ocean exist. Researchers from the U.S. Geological Survey (USGS) and University of South Florida (USF) collected high-resolution measurements of pCO2, pH, total dissolved inorganic carbon (DIC), total alkalinity (TA), and carbonate (CO3-2) from the Chukchi Sea and Canada Basin that fill critical information gaps concerning Arctic carbon variability. A Multiparameter Inorganic Carbon Analyzer (MICA) was used to collect over 22,000 measurements of air and sea pCO2, pH, and DIC along a 9,450-km trackline during August 2010. In addition, 240 discrete surface water samples were taken. These data are being used to characterize and model regional pCO2, pH, and carbonate mineral saturation state. A high-resolution, three-dimensional map of these results will be presented.现有模型预测，北冰洋将在未来十年内出现碳酸盐矿物（carbonate minerals）不饱和状态。近期野外观测结果显示，在海冰消融至最大范围的夏末时段，部分海域或许已处于碳酸盐矿物不饱和状态。然而，目前针对北冰洋碳酸盐系统参数的综合数据集仍较为匮乏。来自美国地质调查局（U.S. Geological Survey, USGS）与南佛罗里达大学（University of South Florida, USF）的研究人员，在楚科奇海与加拿大海盆开展了高分辨率观测，获取了二氧化碳分压（pCO2）、pH、总溶解无机碳（DIC）、总碱度（TA）以及碳酸根离子（CO3^2-）的相关测量数据，填补了北冰洋碳循环变异研究中的关键信息空白。2010年8月，研究团队借助多参数无机碳分析仪（Multiparameter Inorganic Carbon Analyzer, MICA），沿9450公里的测线完成了超过22000组大气与海水pCO2、pH及DIC的观测记录。此外，研究人员还采集了240份离散表层海水样本。上述数据正被用于表征区域pCO2、pH及碳酸盐矿物饱和度状态，并构建相关预测模型。本数据集将呈现该研究结果的高分辨率三维分布图。