ET‐ACDM 2025‐2: 28 May 2025 - wmo-im/et-acdm GitHub Wiki

Date and Time

28 May 2025 11:00 UTC (13:00 CET)

Venue

telecon

Participants

Jörg Klausen, Kaisa Lakkala, Kentaro Ishijima, Gao Chen, Debra Kollonige, Judd Welton, Paolo Laj (WMO Secretariat), Sergi Moreno (WMO Secretariat)

Agenda

1. Approval of minutes from previous meeting

https://github.com/wmo-im/et-acdm/wiki/ET%E2%80%90ACDM-2025%E2%80%901:-18-March-2025

2. GAW updates from Secretariat

  • New ex-officio member Kentaro Ishijima (JMA) introduced, successor to Teruo Kawasaki.

  • A new GAW Science and Implementation Plan has been published.

  • New WMO Science and Innovation Director: Véronique Bouchet (arriving from Environment and Climate Change Canada).

  • Xin Lan (NOAA) appointed as Chair of the GHG SAG.

  • An online course on atmospheric composition for weather forecasters has been launched via WMO Moodle platform.

  • Recent joint meeting has been held on urban atmospheric issues with several SAGs and external programmes (WCRP, WWRP, GAFIS, GURME, APP, etc).

  • A discussion on refreshing ET-ACDM membership is proposed for a future in-person meeting.

  • GAW Symposium tentatively scheduled 13-17 April 2026.

3. User report from WDC, WDCs reported differently in the past, can we agree in common metrics?

  • Paolo Laj vision of the ET-ACDM mandate:

    • To ensure the collection and storage of atmospheric composition data

    • facilitating access and coordination of atmospheric composition data, linking regional and world data centres, and maintaining the data chain

    • aligning data services with GCOS ECVs and improving data visibility and accessibility

    • identifying improvements that can make the data more accessible by offering services and ensuring that users worldwide can access it

    This mandate must be translated into metrics to demonstrate impact (e.g., reports, fact sheets, policy briefs). These materials can be planned as short term goals (6 months)

    Another important topic is how the AI can impact the accessibility to the AC data, is there an evolution in that direction by the GAW data management?**

  • Reactions:

    • Noting the importance of data sharing between NASA field campaigns and the GAW network and the need for common tools and standards.

    • GCOS (AOPC) is trying to rationalise ECVs to avoid duplications, suggestions from the experts can be made via GAW Programme.

4. Update about iCLIMATE and CAMS25

  • iClimateAction

    • A request from EU to WMO, GCOS and GEO to align their strategies:

    • WP2 is about mapping and identifying gaps, identifying problems in the data, in the data chain;

    • WP4 s about ways to enhance use of of data;

    • Documents to be delivered: Guidance on what should be funded next (in collaboration with EUMETSAT, ESA or Copernicus); data chain organisation;

    • Experts required to participate on a voluntary basis, meetings expected to take place in Europe-paid by the project

    Action: Experts interested in participating to contact Secretariat

  • CAMS25

    • WMO monitors WIGOS network with WIGOS Data Quality Monitoring System (WDQMS) webtool.

    • At the moment GAWSIS has in many cases not reliable information.

    • The idea of CAMS25 is be able to monitor GAW network. GHOST tool by BSC has been identified as a solution.

    • A subset of variables within the 690 entries in WMO codes registry for atmospheric composition variables needs to be selected. Proposed GAW variables for monitoring GAW network:

      • carbon dioxide (point, column)
      • methane mole (point, column)
      • nitrous oxide (point, column)
      • hydrogen (point)
      • Trichlorofluoromethane (point)
      • Dichlorodifluoromethane (point)
      • sulfur hexafluoride (point)
      • ozone (point, column, profile)
      • carbon monoxide (point, column)
      • formaldehyde (point, column)
      • sulfur dioxide (point, column)
      • nitrogen dioxide (point, column)
      • aerosol optical depth (Q: wavelengths?)
      • aerosol particle light scattering, back scattering (Q: wavelengths?)
      • particulate matter (TSP, PM1, PM2,5, PM10)
      • total number concentration by one instrument (Q: size fraction?)
      • particle absorption coefficient (Q: size fraction, wavelengths?)
      • isoprene (point)
      • formaldehyde (point)
      • benzene (point)
      • wet deposition
      • solar radiation UV

    • At the moment, different WDCs use different metrics making difficult to assess the GAW network status, see presentation

    • Comments from the audience

      • Assessment of GAW network needs to follow GAW SIP station requirements, which at the same time should be updated.

      • GAWSIS must be separated from OSCAR, the purpose of GAWSIS must be identified and use a standard metadata reporting.

      • Meteoswiss cannot support OSCAR/GAWSIS in the same way as before in future due to budget restrictions.

      • Suggestion the SAGs review the proposed GAW variables.

      • Suggestion to possibly track DOI citation. problems with migration of data pointed out.

Action: To open an issue in github about metrics

6. AOB, next meeting

  • 19 August 11:00 UTC