The webcast and presentations from the BIPM Workshop on Global to Urban Scale Carbon Measurements are now available.

The workshop held on 30 June to 1 July 2015, focused on identifying requirements for advanced measurements, standards, reference data, and instrument comparisons for carbon measurement and other related climate variables to enable complete monitoring systems for greenhouse gases to be operational both at global and regional levels and useful for validating greenhouse gas flux and emission calculations and for the verification of emission inventories.

The workshop was organized around three topic areas:

• Carbon measurement and other related climate variables: Global systems, principles and traceability
• Megacities and Metrology Needs for Supporting Greenhouse Gas Mitigation - Urban Greenhouse Gas Domes
• Standards for greenhouse gas emission inventories.

Evolution of background carbon dioxide concentrations measured at the Mauna Loa Observatory over the last 60 years, presented by Dr James Butler (NOAA) as part of his presentation on 'Tracking the World's Carbon' and the challenges in developing a measurement system to measure CO₂ emissions and fluxes at a regional and local level around the globe.