ET‐ACDM 2025‐1: 18 March 2025 - wmo-im/et-acdm GitHub Wiki

Date and Time

18 March 2025 12:00 UTC (13:00 CET)

Venue

telecon

Participants

Jörg Klausen, Tom Kralidis, Markus Fiebig, Kaisa Lakkala, Gao Chen, Debra Kollonige, Alex Vermeulen, Yuri Brugnara (Empa), Sara Basart (WMO Secretariat), Lingaona Zhu (WMO Secretariat), Paolo Laj (WMO Secretariat), Anna Milan (WMO Secretariat), Timo Proescholdt (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-2024%E2%80%908:-5-December-2024

2. GAW updates from Secretariat

  • WMO Secretariat is facing budget reductions: 35% this year.
  • GAW Secretariat is sourcing resources. Two projects will offer some support:

-iClimateAction funded by EU started in March 2025: https://cordis.europa.eu/project/id/101216980. Request for better alignment of the activities from WMO, GEO and GCOS. Focused on ECVs:

        - is there a home for each of the ECVs and how the information is made available?

        - enhancing data exploitation

iClimate Action project intends to support GCOS IP, there is a plan to meet in UK at the beginning of 2026 with the participation of members from the Expert Teams.

-CAMS25, in preparation, funded by Copernicus, in collaboration with Barcelona Supercomputer Center. Two main outputs expected: update of GAWSIS with real status of the GAW network and provision of NRT data by some selected stations. Part of the funds can be allocated for ET-ACDM in person meetings, allowing discussion with WDC.

Action: to block dates for a possible ET-ACDM in person meeting: 5-7 November 2025

3. Update about the implementation of changes in ozone cross-section

  • Based on scientific publications WOUDC has decided to implement Dobson cross section corrections. Two applications: one time application for the archived data and one on-going application for any incoming data. test are performed on the beta website and will cut over its operations by 31 May.

  • A status table showing which stations are a) doing corrections, b) not doing corrections or c) planning to do corrections will be published in the website.

  • SAG will be consulted before moving to operations. Still no plans for Brewer data.

  • Changes must be reported in the metadata.

*About WOUDC website update: Tom sent a mail 18/03/2025 with the switchover information and here is the link to the beta website

Action: ET-ACDM to provide feedback on the new WOUDC website

3. Presentation about GAW-QC

Yuri's presentation

  • GAW-QC will support the GAW quality control. Examples: before submitting the data to the WDC or to spot instruments malfunction.

  • GAW-QC supports the work of operators in flagging data not replacing them.

  • Another disclaimer alerting anomalies in data not necessarily means wrong data.

  • Suggestion to include stations' wind data when available to support to explain time series behavior.

  • Suggestion to include GAW-QC as part of WDC routine data ingestion for data flagging.

  • Comment from Alex (ICOS): You can get all the ICOS GHG data NRT (daily updated) with all metadata you need also machine 2 machine, though that passed already some automatic QC like this spike detection and has a set of QC tools at ICOS ATC (like here for JFJ: https://www.icos-atc.lsce.ipsl.fr/panelboard/JFJ/)

5. AOB, topics for the next meeting

Next meeting 28 May