BCEIA 2023 ‖ 大会报告特邀专家——Robert Wielgosz

Robert Wielgosz

国际计量局(BIPM)化学部主任

报告题目：Certified Reference Materials for a Global Greenhouse Gas Monitoring Infrastructure

报告摘要

Understanding sources and sinks of Greenhouse Gases (GHG) and the impact of policies to mitigate emissions provides a key tool for action against Climate Change. GHG emissions and uptake can be determined through measurement systems that include in situ measurement of GHG concentration at varying levels of spatial distribution. These measurements together with wind-speed measurements and numerical weather prediction and dispersion models can be used to determine spatially and time resolved GHG emissions and sinks. Maintaining a global system of such measurements, as envisaged, for example, by the WMO initiative on a coordinated global Greenhouse Gas Monitoring Infrastructure, requires close attention to quality assurance and equivalence of measurements from different sites. Significant emissions may lead to small changes in GHG concentration, requiring highly consistent calibration standards at different measurement sites. The presentation will cover the establishment and characterization of CO2 in air standards for the measurements of concentration as well as isotope ratio, for source apportionment, that are required in GHG measurement networks. Generating the highest precision measurements of CO2 in air requires adopting metrological traceability to defined sets of primary standards, the so-called scale approach. The conversion of CO2 in air amount fraction values from one scale to another requires the scale relationships to be well known, noting that the requirement for internal consistency of standards within a scale, such as the WMO-CO2-X2019 scale, is at the 0.01 μmol/mol level, and consistency between different scales should not exceed the 0.02 μmol/mol level [1]. Certified reference materials that are needed to calibrate both in-situ based optical/laser based GHG amount faction and isotope ratio measurements as well as mass spectrometric laboratory-based measurements of isotope ratio will be described, as well as on-going comparisons to verify their equivalence. These comparisons are supporting National

个人简介

Robert Wielgosz博士是位于法国的国际计量局(BIPM)化学部的主任，其气体计量实验室负责组织空气质量和温室气体标准国际比对。这些比对为由国家计量院(NMIs)和指定机构(DIs)组成的世全 球大气监测网络提供标准支撑。他是国际计量委员会(CIPM)气候变化和环境领域任务组成员，也是国际计量局-世界气象组织(WMO)“气候行动中的计量”研讨会指导委员会主席。他发表测量科学相关论文60余篇，包括世界气象组织大气气体成分测量指南。他拥有剑桥大学伊曼纽尔学院(英国)的自然科学硕士学位，巴斯大学(英国)的博士学位，并在乌尔姆大学(德国)完成了皇 家学会欧洲交流研究。

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