The workshop will cover the themes of metrology in support of the physical science basis of climate change and climate observations, as well as metrology towards a coordinated system to evaluate greenhouse gas emission budgets based on accurate observations. The output of the workshop will be a set of recommendations on key technical challenge areas for metrology over the next decade. To register your interest or find more information visit: https://www.bipm.org/en/bipm-workshops/bipm-wmo-workshop-2022. There will be a call for papers and posters shortly.