CMIP Community Workshop 2026 – call for side sessions

The CMIP Community Workshop 2026 will be held in Kyoto, Japan from 9-13^th March 2026.  The call for side session is now open.  The Scientific Organising Committee seeks to co-create CMIP26 as a bottom-up community effort driven by scientists, practitioners, and stakeholders. We are asking you to take an active part in organising the scientific programme of the workshop by proposing engaging side sessions by 12:00 UTC, 21 July 2025.

🔗 Link to CMIP26 event webpage

🔗 Link to Call for Side Session Proposals

📅 Deadline: 21 July 2025

CMIP Community Workshop 2026 – call for abstracts

The CMIP Community Workshop 2026 will be held in Kyoto, Japan from 9-13^th March 2026.  The call for abstracts for CMIP26 is now open! You can submit your abstract through our online system – please note you will need to set up an Oxford Abstracts account if you do not already have one. Details of the workshop sessions can be found on the Call for abstracts page.

The deadline for abstract submission is 12:00 UTC, 13 August 2025.

🔗 Link to CMIP26 event webpage

🔗 Link to Call for Abstracts

📅 Deadline: 13 August 2025

Registration and abstract submission for the next CACTI workshop, due to take place from Tuesday 16th September to Thursday 18th September 2025 inclusive in person at the UK Met Office (Exeter, United Kingdom) and online, are now open. 

Registration with the option to submit an abstract can be done by completing this form:

Abstract and Registration. The closing date for registration and abstract submissions is 

Friday 11 July 2025. 

If you’re planning to travel to the UK to attend the workshop in person, please check any requirements for a visa or an electronic travel authorization (ETA) at: https://www.gov.uk/check-uk-visa

If you need a formal letter from us for your travel approval and/or visa, please let us know and we can provide one. 

The scope of the workshop includes trace gas and aerosol composition responses to changes in natural and/or anthropogenic emission changes, air quality, radiative forcing, global and regional climate responses to emission perturbations, and climate feedbacks on trace gases and aerosols. Contributions on atmospheric composition process representation, model evaluation, as well as Earth system interactions are also in scope. We anticipate that the workshop will be of interest to those working on model intercomparison projects (MIPs) and community projects such as HTAP, CCMI, TOAR, and Aerocom, as well as CMIP7 community MIPs such as DAMIP, GeoMIP and RFMIP. The workshop will include oral presentations, poster presentations, and there will be breakout groups to discuss plans for analysis of the CMIP7 simulations, including Fast Track and other relevant community MIPs such as AerChemMIP2. 

Further details on CACTI activities can be found on our webpage (Workshop details will appear shortly!) and all further announcements on the workshop will be done via the CACTI and AerChemMIP2 mailing lists. These are low-traffic mailing lists and you can subscribe by sending an email to and , respectively.

The call for nominations to APARC’s Scientific Steering Group (SSG) is now open. During recent years, the project’s scope has been broadened to now include dynamical and chemical processes in the whole atmosphere. APARC strives to understand atmospheric dynamics and composition, as well as its implications for climate variability and climate change. The SSG currently comprises 12-14 researchers from around the world with a wide range of expertise in atmospheric dynamics and chemistry. They guide APARC’s priorities and activities, working together with
the SSG co-chairs and the APARC project office.
Please note that you can either nominate a candidate or nominate yourself. The SSG takes a strategic view of APARC’s role, so we are looking for individuals with a broad view of atmospheric science and climate change as well as expertise in their own field. Scientific expertise, career stage as
well as gender and geographical balance are considered. The initial term of service is for four years
(January 2026 – December 2029), with a possible extension of two years.
You find all relevant information and the online form to submit your nomination at the APARC website.
In case you have any questions, do not hesitate to contact the IPO:

An International Symposium Celebrating 35 Years of Global Atmospheric Research Enhanced by NDACC/NDSC Observations

The 2025 NDACC Symposium, hosted by Hampton University, celebrating 35 years of atmospheric research fostered by Network observations, will provide a forum to exchange information on the latest scientific achievements using NDACC and related observations, and to present NDACC’s measurement strategy for the future. We expect 150-200 scientists to participate in person, with more joining online.

We are pleased to announce the opening of abstract submissions for the NDACC 2025 Symposium. Abstract submission will remain open until 7 May 2025.  Please submit abstracts at https://ndacc.cas.hamptonu.edu/

The 13th International Limb Workshop will be organized by the Institute of Meteorology and Climate Research (IMKASF) of Karlsruhe Institute of Technology (KIT), Germany, the home of MIPAS, GLORIA and CAIRT. It will take place on 2-6 June 2025 in Karlsruhe Palace, in the heart of Karlsruhe City, Germany.

The workshop aims to inform the community of the status of upcoming and existing missions and their data products, bring together limb-sounding communities from Earth and planetary atmospheres, and share their latest results.

We welcome contributions from all teams involved in the development, data processing, and scientific research of atmospheric limb missions:

• Past: e.g., UARS-MLS, SAGE-II, HIRDLS, SMILES, SCIAMACHY, GOMOS, MIPAS
• Ongoing: e.g., SAGE-III/ISS, OSIRIS, OMPS-LP, ACE-FTS, Aura-MLS, MATS
• Future and Proposed: e.g., ALTIUS, ALI, CAIRT, HAWC, STRIVE, ESOTERIC, KEYSTONE.

Building on the success of the previous 12th Limb Workshop, this workshop will also include planetary limb missions (e.g., SOIR/VEx, NOMAD/TGO, OMEGA/MEx).

Solicited topics for both Earth and planetary missions include:

• Current and past limb and occultation instruments: algorithms, products, validation
• Upcoming Earth observation limb and occultation instruments
• Planetary missions: instruments and algorithms
• Atmospheric composition (Earth and planets), chemistry and transport
• Aerosols and clouds
• Gravity waves
• Applications (e.g., data assimilation, gridded products, spacecraft re-entry plumes)

Abstract submission is open until 15 March.

https://indico.scc.kit.edu/event/4811

This EPESC – LEADER Science Meeting will bring together the wider scientific community working on these two WCRP activities to share and discuss emerging topics and issues on the design and delivery of an integrated capability for quantitative observation, explanation, early warning and prediction of Earth System Change on global and regional spatial scales and annual to decadal (A2D) timescales. Both groups will share insights from analysis of large ensembles of climate model experiments to advance understanding and attribution of dynamically-driven extremes. Sessions are being planned to share the work and address the needs of each of the Working Groups.

Goals
• To bring together the full EPESC and LEADER communities for cross-working group coordination and pollination of ideas, approaches and results.
• To share progress on understanding the role of external forcing and internal variability in different regions of the world, and exchange ideas on overcoming challenges in assessing and attributing natural and anthropogenic drivers of climate hazards.
• To share research using the Large Ensemble Single Forcing Model Intercomparison Project (LESFMIP) to diagnose circulation responses to model forcing, the role of model error, and the predictability of large-scale circulations.
• To advance the vision of operationalization of decadal forecasts, and build towards the vision of an integrated capability for attribution, early warning and prediction of Earth System Change on global and regional spatial scales and annual to decadal (A2D) timescales.

In addition to presentations from the core working groups of LEADER/EPESC and ensuing discussions, the meeting will include contributed talks and posters. Should you be involved in analyses that are of relevance to EPESC and/or LEADER, or that will help inform future plans of LEADER/EPESC, please submit an abstract using this link. The abstract submission deadline is March 22, 2025. Presenters can request oral or poster formats for their presentation, and it is fine to submit multiple abstracts. We hope to send decisions on accepted abstracts within a few weeks of the closing date. Please feel free to forward this message more widely as you see fit.  

For additional details and for the form to submit your abstract, please see: https://www.wcrp-climate.org/epesc-leader-meeting2025 . The closing date is March 22nd.

As many of you probably already know, CliC is planning an open science conference in Wellington New Zealand, 9 – 12 February, 2026 (clic2026.com).  We very much hope to see many of you there and ask you to share the details with any relevant networks. 

APARC ATC Spring Meeting, 23–25 April 2025 in Graz, Austria at the Wegener Center for Climate and Global Change, University of Graz

The goal of our APARC ATC Spring meeting is to present our latest research results, to identify key science problems that we can collectively address, and to organize and contribute to community organized papers. Please fill out this form for attendance.

Second announcement and call for abstracts for the joint FISAPS – GW Symposium at Yonsei University, Seoul in June 2025

This call is purely for abstracts, and we will circulate a registration form for the meeting separately in early 2025. Please feel free to forward this message more widely as you see fit; all are welcome, and you do not need to be a formal member of either Activity to attend or present.

 We are happy to consider any abstract within the scientific remit of the GW Activity or FISAPS, whether in the area of modelling, theory, observations or other. You will be asked to specify if your abstract is closer to the area of FISAPS or GWs, but there is an option to say it is relevant to both and there will be joint sessions between the two meetings suitable for such topics. Presenters can request oral, poster or flash (up to two minutes, with slides) formats for their presentation, and it is fine to submit multiple abstracts. We hope to send decisions on accepted abstracts within a few weeks of the closing date.

 You can find a form to submit your abstract here: https://tinyurl.com/gwfiabstracts.  The closing date is Saturday 11^th of January.

An International Symposium Celebrating 35 Years of Global Atmospheric Research Enhanced by NDACC/NDSC Observations

The 2025 NDACC Symposium, hosted by Hampton University, celebrating 35 years of atmospheric research fostered by Network observations, will provide a forum to exchange information on the latest scientific achievements using NDACC and related observations, and to present NDACC’s measurement strategy for the future. We expect 150-200 scientists to participate in person, with more joining online.

Further information about the NDACC Symposium will be distributed through the ndacc.org webpage (starting in January 2025) with the abstract call coming in early spring of 2025.