Development of Instrumentation for Continuous Field-Based Measurements of Atmospheric and Oceanic Ar/N2, O2/N2, and CO2/N2 ratios and related isotopic tracers

开发用于连续现场测量大气和海洋 Ar/N2、O2/N2 和 CO2/N2 比率及相关同位素示踪剂的仪器

• 批准号: 0421546
• 负责人: Ralph Keeling
• 金额: --
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-10-01 至 2009-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0421546&HistoricalAwards=false
• 关键词: Development; Instrumentation; Continuous; Field; Based

0421546KeelingThis Major Research Instrumentation development award to Scripps Institution of Oceanography at the University of California San Diego campus provides funds for the development of a capability to make continuous, extremely high precision measurements of atmospheric Ar/N2 , O2/N2, and CO2/N2 ratios and related isotopic tracers. The goal is to use the measurement of changes in the Ar/N2 ratio, combined with other constraints on atmospheric mixing, to remotely sense the large-scale exchanges of heat between the atmosphere and ocean, thus providing an inexpensive complement to observations made by ships, floats and satellites. Rapid atmospheric mixing rates mean that a modest program of Ar/N2 observations can potentially constrain the heat exchange integrated over wide areas, such as full ocean basins or an entire hemisphere. The proposed approach uses two isotope ratio mass spectrometers, one deployed at Scripps Institution and one aboard a research vessel, to provide the geographic and temporal sampling needed to observe predicted change in isotope ratios due to changes in heat flux. The sampling procedures include a customized inlet system, and are designed to address concerns identified with errors in precision associated with flask sampling. The shipboard system will include underway collection of gases dissolved in surface sea water, and will have ten collectors spanning masses 28 to 45, providing simultaneous measurement of a number of important tracers. The broader impacts of the development are in the ability to improve global climate models, improving our ability to predict how anthropogenic inputs impact climate change. The project will also involve students and a postdoctoral investigator in a cutting edge research development. Scripps Institution of Oceanography is providing 30% of the equipment costs of the project from non-federal funds. This proposal is supported by the Division of Ocean Sciences at NSF. ***

0421546 Keeling这一重大研究仪器开发奖授予了位于加州圣地亚哥校区的斯克里普斯海洋学研究所，为开发对大气Ar/N2、O2/N2和CO2/N2比率以及相关同位素示踪剂进行连续、极高精度测量的能力提供资金。 目标是利用对Ar/N2比率变化的测量，结合对大气混合的其他限制，遥感大气和海洋之间的大规模热交换，从而为船舶、浮标和卫星进行的观测提供廉价的补充。 快速的大气混合速率意味着适度的Ar/N2观测计划可能会限制广泛区域（如整个海洋盆地或整个半球）的热交换。所提出的方法使用两个同位素比质谱仪，一个部署在斯克里普斯研究所，一个在研究船上，提供所需的地理和时间采样，以观察由于热通量的变化而导致的同位素比的预测变化。取样程序包括定制的入口系统，旨在解决与烧瓶取样相关的精度误差问题。 该船载系统将包括正在进行的溶解在表面海水中的气体收集，并将有10个收集器，跨越质量28至45，提供同时测量的一些重要的示踪剂。 这一发展的更广泛影响是改善全球气候模型的能力，提高我们预测人为输入如何影响气候变化的能力。 该项目还将涉及学生和博士后研究人员在前沿的研究发展。 斯克里普斯海洋研究所将从非联邦基金中提供该项目30%的设备费用。 这项建议得到了NSF海洋科学部的支持。***