Collaborative Research: Observation and Prediction of Ocean Acidification in the Western Arctic Ocean - Impacts of Physical and Biogeochemical Processes on Carbonate Mineral States

调查人员将评估北冰洋西部的海洋酸化，使用目前计划在博福特海进行年度停泊周转的船舶时间。在2011 - 2013年9月的这些巡航中，调查人员将收集样品用于测量碳酸盐系统参数、无机营养物、溶解氧、氧同位素和氧/氩比，以及持续测量溶解氧、氧/氩比和pCO2。这些数据将用于深入了解和透视北冰洋西部海洋酸化的程度;影响文石和方解石饱和状态的关键物理、化学和生物过程;以及对水层和底栖群落的潜在影响。水柱观测结果将与相关NSF AON（北极观测网络）资助的系泊数据合成，包括温度，盐度，硝酸盐，氧气，pCO2和pH值，以及该地区其他巡航收集的碳和水文数据。在每个实地考察季节，PI将前往几个土著村庄，在城镇会议和课堂上讨论海洋酸化的潜在影响。这项工作将有助于在各种科学计划和实施结构下协调的碳循环研究，旨在建立对碳预算和通量的准确估计以及对其进行监管的基本机制。一名博士后科学家将直接参与这项工作，其结果将纳入由首席研究员教授的一门本科课程和两门研究生课程。

The investigators will assess ocean acidification in the western Arctic Ocean, using ship time that is currently scheduled for annual mooring turnarounds in the Beaufort Sea. On these cruises, in September of 2011-2013, the investigators will collect samples for measurement of carbonate system parameters, inorganic nutrients, dissolved oxygen, oxygen isotopes, and oxygen/argon ratios, as well as continuous underway measurements of dissolved oxygen, oxygen/argon ratios, and pCO2. These data will be used to gain insights and perspectives into the extent of ocean acidification in the western Arctic Ocean; the key physical, chemical, and biological processes influencing the saturation states of aragonite and calcite; and potential impacts to pelagic and benthic communities. Water column observations will be synthesized with data from the associated NSF AON (Arctic Observing Network)-funded mooring, including temperature, salinity, nitrate, oxygen, pCO2, and pH, as well as carbon and hydrographic data collected on other cruises in the region. During each field season the PI will travel to several native villages to discuss the potential impacts of ocean acidification at town meetings and in classrooms. The work will contribute to carbon cycle studies coordinated under a variety of science plans and implementation structures that aim to establish accurate estimates of carbon budgets and fluxes and the underlying mechanisms that regulate them. A postdoctoral scientist will participate directly in this work, and results will be incorporated in one undergraduate level course and two graduate level courses taught by the lead investigator.