Rapport BIPM-2024/01
Change in the value of the UV ozone absorption cross section: Recommendations for metadata provision
Christoph Zellweger, James E. Norris, Bernhard Niederhauser, Wilma Travnicek, Andrea Minkos, Xiaobin Xu, Sangil Lee, Sverre Solberg, Owen Cooper, Herman G.J. Smit, Leah R. Kauffman
Abstract
The international gas measurement community will adopt a new value for the ozone absorption cross section for calculating surface measurements made by Ultraviolet (UV) photometers. The new value enables ozone measurements with less uncertainty and higher accuracy than the current absorption cross section value. The implementation of the new value will start on 1 January 2025 and should be accomplished before 1 January 2026. It is recommended to use flags or metadata to note which absorption cross section value you used to generate your data.
DOI: 10.59161/Rapport202401