Temporal Evolution of Chlorofluorocarbons and Inorganic Carbon in the Southern and Southwestern Pacific Oceans

摘要-0095960拟议测量的重点是更好地约束被动示踪剂氯氟烃（CFCs）的时间变化和人为CO2渗透到复杂的水团转换经历的表面和近表面沃茨南大洋地区。 南大洋吸收人为CO2的速率对全球碳清单和未来气候变化具有广泛的意义。目前的全球海洋三维大气环流模型（OGCM）在南大洋的比较不好，往往表明更高的CO2库存比观测允许。来自华盛顿大学的调查人员将参加澳大利亚研究人员（澳大利亚科学与工业研究组织-海洋研究，霍巴特）预定在南大洋两个部分进行的水文考察，并将专门测量氯氟烃和海洋碳系统参数（TCO 2、TA）。 对氟氯化碳数量的数据分析旨在评估已知水团表面通风率的近期变化。 将使用准保守示踪剂DC* 方法分析CO2的时间变化。

ABSTRACTOCE-0095960The focus of the proposed measurements is to better constrain temporal changes in passive tracer chloroflurocarbons (CFCs) and anthropogenic CO2 penetration into the complex water mass transformations undergone by surface and near-surface waters regions of the Southern Ocean. The rate at which the Southern Ocean takes up anthropogenic CO2 is of broad interest to the global carbon inventory and future climate change. Current global ocean 3D general circulation models (OGCMs) do not compare well in the Southern Ocean and often suggest higher CO2 inventories than observations allow. Investigators form the University of Washington will join scheduled hydrographic cruises to be undertaken by Australian researchers (CSIRO- Marine Research, Hobart) on two Southern Ocean sections, and will specifically measure chloroflurocarbons (CFC's) and ocean carbon system parameters (TCO2, TA). Data analysis of the CFC numbers will be aimed at assessing recent changes in surface ventilation rates in known water masses. Temporal changes in CO2 will be analysed using the quasi-conservative tracer DC* approach.