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

[0421546]基林：美国加州大学圣地亚哥分校斯克里普斯海洋学研究所获得的主要研究仪器开发奖，为开发一种能够对大气中Ar/N2、O2/N2和CO2/N2比率以及相关同位素示踪剂进行连续、高精度测量的能力提供了资金。目标是利用测量Ar/N2比率的变化，结合大气混合的其他限制条件，远程感知大气和海洋之间的大规模热量交换，从而为船舶、浮标和卫星的观测提供一种廉价的补充。快速的大气混合速率意味着一个适度的Ar/N2观测计划可能会限制大范围内的热交换，例如整个海洋盆地或整个半球。拟议的方法使用两台同位素比值质谱仪，一台部署在斯克里普斯研究所，另一台安装在一艘研究船上，以提供观测由于热通量变化而导致的同位素比值预测变化所需的地理和时间采样。采样程序包括一个定制的入口系统，旨在解决与烧瓶采样相关的精度错误所确定的问题。船载系统将包括正在进行的海水表面溶解气体收集，并将有10个收集器，覆盖质量28到45，同时提供许多重要示踪剂的测量。更广泛的影响是改进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一名博士后研究人员的前沿研究发展。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。该提案得到了美国国家科学基金会海洋科学部的支持。* * *

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. ***