RAPID: US Geotraces N. Atlantic: Measuring the 13C-DIC distribution and quantifying the impact of organic matter export on 13C, nutrients and biologically active trace metals

华盛顿大学的一个研究小组将利用快速反应研究基金（Rapid）的资助，参加2011年秋季的一次原本没有计划的海洋巡航，这是美国GEOTRACES北大西洋活动的一部分，目的是研究海洋水柱中的碳和氧同位素特征。最初的，不完整的巡航（在2010年秋天）由于船舶推进系统的故障而过早终止。2011年即将到来的后续巡航将沿着伍兹霍尔，马萨诸塞州和佛得角群岛之间的轨道进行。这些RAPID基金将只支付在未来巡航期间准备采集样本的费用，而不支付对海水样本进行实验室分析或数据合成的费用。这个团队最初是由ARRA奖资助的，他们将在未来的巡航中测量与最初巡航相同的海水特性，即溶解无机碳的13C/12C以及溶解O2和Ar气体的浓度。科学目标没有改变；也就是说，他们将使用两种不同的方法来量化有机物（OM）的输出速率，这两种方法依赖于测量的大气-海洋不平衡的del-13C和溶解的O2气体。该小组还将确定OM出口及其随后的再矿化对地表水和深水中生物活性微量元素（BTE）、del-13C-DIC和营养关系的影响。更广泛的影响：由于这些海洋碳系统数据将成为多研究者国际研究的一部分，它们将提供给参与海洋化学及其与全球气候变化关系研究的全球社区。项目结果也将纳入首席研究员的教学课程，项目本身将为本科生参与实验室分析工作提供条件。

With funding through a Grant for Rapid Response Research (RAPID), a research team at the University of Washington will participate in an originally unplanned oceanographic cruise in autumn 2011, as part of the U.S. GEOTRACES North Atlantic campaign to study carbon and oxygen isotopic signatures in the oceanic water column. The original, incomplete cruise (in autumn 2010) was terminated prematurely because of failure of the ship's propulsion system. The forthcoming follow-up cruise in 2011 will follow a track between Woods Hole, MA and Cape Verde Islands. These RAPID funds are being will cover only the costs of preparing for sample collection during the future cruise and not for laboratory analysis of the seawater samples or synthesis of the data. This team, originally supported through an ARRA award, will measure the same seawater characteristics on the future cruise as was proposed for the original cruise -- that is, the 13C/12C of dissolved inorganic carbon and the concentration of dissolved O2 and Ar gases. The scientific objectives have not changed; namely, they will quantify the rate of organic matter (OM) export using two separate methods that rely on the measured air-sea disequilibrium for del-13C and for dissolved O2 gas. The team will also determine the impact that OM export and its subsequent remineralization on the relationship between bioactive trace elements (BTE), del-13C-DIC and nutrient relationships in surface waters and at depth.Broader Impacts: Because these ocean carbon system data will become part of a multi-investigator international study, they will be made available to a worldwide community involved in the study of ocean chemistry and its relationship to global climatic change. Project results will also be incorporated into the principal investigator's teaching curricula, and the project itself will make provision for the participation of idergraduate students in the laboratory analytical work.