GEOTRACES Pacific Section: Measurement of CFCs and SF6

GEOTRACES 太平洋部分：CFC 和 SF6 的测量

• 批准号: 1234351
• 负责人: Rana Fine
• 金额: $ 52.72万
• 依托单位: University of Miami
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1234351&HistoricalAwards=false
• 关键词: GEOTRACES; Pacific; Section; Measurement; CFCs

A scientist from the University of Miami, Rosenstiel School of Marine and Atmospheric Science, will make high quality chlorofluorocarbon (CFC) and sulfur hexafluoride (SF6) measurements during the 2013 GEOTRACES cruise to the Eastern Tropical South Pacific Ocean. These measurements will provide an overall oceanographic context for the cruise, as well as contribute to the interpretation of GEOTRACES trace elements and their isotopes (TEIs) by characterizing the physical processes which can affect their speciation and internal cycling. In addition, for the low oxygen waters in the oxygen minimum zone (OMZ), the researcher will distinguish water that is old as a result of physical circulation processes from recently renewed, yet low oxygen waters due to biochemical processes. Tracer ages will help constrain the residence times of the OMZ layers. Secondly, rates of biochemically important processes such as apparent oxygen utilization and denitrification in upwelling areas, the OMZ, and low nitrate regions will be compared with estimates from historical data. Lastly, ventilated thermocline and intermediate water masses within which TEIs reside will be identified and their effective time scales of circulation from the source regions will be estimated.In terms of the broader impacts, the scientist will continue her active participation in the National Science Foundation ADVANCE program, as well as the Mentoring Physical Oceanography Women to Increase Retention (MPOWIR) program. One graduate student will be supported and trained as part of this project.

迈阿密大学罗森斯蒂尔海洋与大气科学学院的一位科学家将在 2013 年 GEOTRACES 前往热带南太平洋东部的航行期间进行高质量的氯氟碳化合物 (CFC) 和六氟化硫 (SF6) 测量。 这些测量将为巡航提供整体海洋学背景，并通过表征可能影响其形态和内部循环的物理过程，有助于对 GEOTRACES 微量元素及其同位素 (TEI) 的解释。 此外，对于最低氧区（OMZ）的低氧水，研究人员将区分由于物理循环过程而导致的陈旧水和最近更新的、由于生化过程而导致的低氧水。 示踪剂年龄将有助于限制 OMZ 层的停留时间。 其次，上升流区域、OMZ 和低硝酸盐区域的表观氧利用和反硝化等生化重要过程的速率将与历史数据的估计值进行比较。 最后，将确定 TEI 所在的通风温跃层和中间水团，并估计它们从源区循环的有效时间尺度。就更广泛的影响而言，科学家将继续积极参与国家科学基金会 ADVANCE计划，以及指导物理海洋学女性以提高保留率 (MPOWIR) 计划。 作为该项目的一部分，一名研究生将得到支持和培训。