國際計量局（BIPM）化學部主任



報告題目：Certified Reference Materials for a Global Greenhouse Gas Monitoring Infrastructure 
報告摘要

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

個人簡介

Robert Wielgosz博士是位于法國的國際計量局（BIPM）化學部的主任，其氣體計量實驗室負責組織空氣質(zhì)量和溫室氣體標準國際比對。這些比對為由國家計量院（NMIs）和指定機構（DIs）組成的世全球大氣監(jiān)測網(wǎng)絡提供標準支撐。他是國際計量委員會（CIPM）氣候變化和環(huán)境領域任務組成員，也是國際計量局-世界氣象組織（WMO）“氣候行動中的計量”研討會指導委員會主席。他發(fā)表測量科學相關論文60余篇，包括世界氣象組織大氣氣體成分測量指南。他擁有劍橋大學伊曼紐爾學院（英國）的自然科學碩士學位，巴斯大學（英國）的博士學位，并在烏爾姆大學（德國）完成了皇家學會歐洲交流研究。