1st CIPM STG-CENV • Stakeholder meeting • 16-18 September 2024 • BIPM • Sèvres (France)

Meeting organization

Theme 1: Metrology in support of the physical science basis of climate change and climate Observations

Code Topic Co-chair 1 Co-chair 2

Atmosphere Physics and Chemistry

Betsy Weatherhead
Fabio Madonna

Oceans and Hydrology

George Petihakis
Johannes Karstensen

Earth Energy Balance

Laurent Vuilleumier
Thorsten Fehr

Biosphere Monitoring

Julia Marrs
Rubén Urraca

Cryosphere Monitoring

Emma Woolliams
Filomena Catapano

Cross-cutting issues

Dolores del Campo


Emma Woolliams
Fabio Madonna

Theme 1: recommendations






Theme 2: Metrology as an integral component of operational systems to estimate greenhouse gas emissions based on accurate measurements and analyses

Code Topic Co-chair 1 Co-chair 2

Accuracy requirements for atmospheric composition measurements across economic sectors, and temporal and spatial scales

Robert Wielgosz
Sergi Moreno Valero

State of play in integrated approaches for advanced GHG emission estimates and the way forward to operational services.

Leonard Rivier
Phil de Cola

Novel GHG concentration and flux methods and sensors

Hong Lin
Kevin Cossel

Strengthening the linkage of remote sensing GHG concentration measurements to emission fluxes

Richard Barker
Annmarie Eldering

Emerging Metrology Issues (Oceans, CCUS, CDR, Agricultural Emissions…)

Maribel Garcia-Ibañez
Pamela Chu

Chairs and co-chairs

Laurent Vuilleumier

Senior scientist at MeteoSwiss
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Laurent Vuilleumier is a senior scientist at the Swiss Federal Office of Meteorology and Climatology (MeteoSwiss). He is a specialist of precision ground surface radiation monitoring for climate change research. He is responsible for MeteoSwiss activities within the Baseline Surface Radiation Network (BSRN) and, for UV radiation, within the Global Atmosphere Watch (GAW). Laurent Vuilleumier studied physics at EPFL, the Swiss Federal Institute of Technology in Lausanne. In 1994, he obtained his PhD in high energy physics within the L3 collaboration at CERN. Between 1995 and 2001 he worked at the US DoE Lawrence Berkeley National Laboratory in the Environmental Energy Technologies division where he conducted research in the domain of air quality modelling focusing on summer smog in cities. In this framework, he researched how uncertainty should be accounted in air quality models and how it affects the reliability of the model predictions. Since end of 2001, Laurent Vuilleumier works at MeteoSwiss as responsible of the Swiss Alpine Climate Radiation Monitoring network and is the BSRN site scientist. He directed, or collaborated to, studies of aerosol and cloud effects on radiation, cloud detections studies and trend analysis for solar and terrestrial radiation time series as well as aerosol optical depth. Laurent Vuilleumier also participated in European collaborations aiming at improving forecasts of solar radiation for the renewable energy sector. At the Swiss national level, he participated in multidisciplinary studies for assessing UV radiation doses on humans and their impact on public health. Since 2013, he is member of the Advisory Commission of the PMOD/WRC whose Word Radiation Centre is in charge of maintaining the primary references for solar and terrestrial radiation. Since 2018, he is the chair of the WMO Expert Team on Radiation References (ET-RR) whose task is assessing the current status of the solar and terrestrial radiation references and address implications of proposed changes to those references.