This topic will be used for announcements to the Atmosphere Working Group by the leadership team. 📅 Atmosphere Working Group meeting · November 25, 2026 11:30 AM → November 25, 2026 12:30 PM (Australia/Sydney) We will announce meetings, workshops and events through this topic. There will not be an email list. You need to watch this topic to receive new announcements via email notifications. This youtube video explains how to watch a topic on the ACCESS-Hive Forum. To avoid individuals accidentally spamming the whole group, this topic is closed and only the leadership team will be able to post replies. If you have questions check if the question has already been asked in the Atmosphere Category, and if not open a topic on the forum or reply to the Atmosphere Working Group description topic.

Self-nominations for the ACCESS-NRI Scientific Advisory Committee (SAC) The ACCESS-NRI Scientific Advisory Committee (SAC) is changing the way it operates, and we are now inviting self-nominations for new members. We encourage applications from across the ACCESS Community. We are seeking a diverse committee that includes representatives from each of the ACCESS Community Working Groups, as well as members from different career stages and areas of research, technical or infrastructure expertise. To apply and for more information go to: Self-nominations for the ACCESS-NRI Scientific Advisory Committee (SAC) We are also seeking your recommendations for potential international members to join our SAC. Please send their details (name, organisation and email and a brief rationale for why you’re recommending them) to access.nri@anu.edu.au.

Atmosphere WG meeting 25.02.2026 For a calendar invite, simply click on the relevant calendar link below When: 25/02/2026 11:30 to 25/02/2026 12:30 Zoom Meeting Link Add to Google Calendar Add to Office365 Calendar Agenda: Admin: Volunteer for taking today’s meeting minutes to post here on the Forum. Brief update from WG co-chairs and ACCESS-NRI: Yi Huang, Charmaine Franklin, Matt Woodhouse, Heidi Nettelbeck (5mins) ACCESS-NRI 2026/27 Work Plan: Community input Claire Courage/Kelsey Druken (5mins) ACCESS-NRI is keen to involve the community more closely in planning their next Annual Work Plan (FY2026-27). If you have any ideas, priorities or suggestions of what to include, please use this online form - submission closes on 16 March, 2026. To help inform your feedback, you may wish to refer to our Current-Year Status Report (FY2025-26). Community Seamless Evaluation Toolkit (CSET) (35+5mins) Jorge Bornemann, Vinod Kumar CSET is a community-developed open source toolkit for evaluation, verification, and investigation of weather and climate models. It supports the evaluation of physical numerical models, machine learning models, and observations seamlessly across time and space scales. Jorge and Vinod will give an overview of CSET followed by a demo of how to use it. Compute/storage resources: Heidi Nettelbeck (5mins) Any experiment proposals for Q1/2026 (1.5 MSU allocation)? → See here for how to apply for Atmosphere WG Resources. Next Atmosphere WG meeting: March 2026

!!Reminder: Atmosphere WG meeting 25.02.2026 For a calendar invite, simply click on the relevant calendar link below When: 25/02/2026 11:30 to 25/02/2026 12:30 Zoom Meeting Link Add to Google Calendar Add to Office365 Calendar Agenda: Admin: Volunteer for taking today’s meeting minutes to post here on the Forum. Brief update from WG co-chairs and ACCESS-NRI: Yi Huang, Charmaine Franklin, Matt Woodhouse, Heidi Nettelbeck (5mins) ACCESS-NRI 2026/27 Work Plan: Community input Claire Courage/Kelsey Druken (5mins) ACCESS-NRI is keen to involve the community more closely in planning their next Annual Work Plan (FY2026-27). If you have any ideas, priorities or suggestions of what to include, please use this online form - submission closes on 16 March, 2026. To help inform your feedback, you may wish to refer to our Current-Year Status Report (FY2025-26). Community Seamless Evaluation Toolkit (CSET) (35+5mins) Jorge Bornemann, Vinod Kumar CSET is a community-developed open source toolkit for evaluation, verification, and investigation of weather and climate models. It supports the evaluation of physical numerical models, machine learning models, and observations seamlessly across time and space scales. Jorge and Vinod will give an overview of CSET followed by a demo of how to use it. Compute/storage resources: Heidi Nettelbeck (5mins) Any experiment proposals for Q1/2026 (1.5 MSU allocation)? → See here for how to apply for Atmosphere WG Resources. Next Atmosphere WG meeting: March 2026

Atmosphere WG meeting 25.03.2026 For a calendar invite, simply click on the relevant calendar link below When: 25/03/2026 11:30 to 25/03/2026 12:30 Zoom Meeting Link Add to Google Calendar Add to Office365 Calendar Agenda: Admin: Volunteer for taking today’s meeting minutes to post here on the Forum. Brief update from WG co-chairs and ACCESS-NRI: Yi Huang, Charmaine Franklin, Matt Woodhouse, Heidi Nettelbeck (5mins) Machine Learning/Atmosphere Workshop (Melbourne, Aug 2026): Heidi Nettelbeck (10mins) Discussion: Which aspects of ML interests the Atmosphere WG community? (e.g., parameterisation with ML techniques, evaluation aspects of ML to better understand systemic biases, climate projected variables, drivers of climate extremes) Compute/storage resources: Heidi Nettelbeck (5mins) Any experiment proposals for Q1/2026 (1.5 MSU allocation)? → See here for how to apply for Atmosphere WG Resources. Atmosphere WG co-chair shake-up Matt Woodhouse, Heidi Nettelbeck (5mins) → Are you interested in becoming an Atmosphere WG co-chair? Implementation of aerosol-aware ice nucleation particle (INP) parameterizations in the high resolution regional UM model over the Southern Ocean Zhangcheng Pei (10mins) Inferring long-term cloud responses to warming from their short-term variability Qinggang Gao, Yi Huang (10mins) A key challenge in climate science remains reducing uncertainties in the estimates of equilibrium climate sensitivity (ECS), typically quantified as the increase in global mean surface air temperature at an equilibrium state after doubling CO2 concentrations. CMIP6 simulations show a wide spread of ECS estimates, with several models exceeding 5 K, which was not observed in earlier CMIP studies. Climate models based on the latest UKMO UM are among the ‘hot’ models with large ECS. Radiative forcings and feedbacks in these models have been investigated, and the large ECS was partly attributed to large positive midlatitude cloud feedback. Recent studies suggest that long-term cloud responses to warming can be inferred from their diurnal cycle and seasonal variations. This work investigates cloud responses to environmental condition changes at diurnal, seasonal, and interannual time scales and their link to longer-term cloud feedback. Qinggang will show results from new ACCESS-AM3 N96 simulations (1982-2012) with the ISCCP and CALIPSO satellite simulators. An SST+4K simulation is run in addition to the control simulation to investigate cloud responses to large-scale forcings. Next Atmosphere WG meeting: April 2026

Hi, A reminder that the first period for community input on the ACCESS‑NRI Work Plan for FY26–27 is now open and will close on Monday, 16 March . If you haven’t already, please take a moment to share your feedback, through this form—your insights are essential to shaping the upcoming work plan. We welcome all input, big or small, new ideas or projects already discussed, ideas on model development, usability, release, accessibility, evaluation, tools, etc. You can find more information on the ACCESS-Hive forum. Claire

!!Reminder: Atmosphere WG meeting 25.03.2026 For a calendar invite, simply click on the relevant calendar link below When: 25/03/2026 11:30 to 25/03/2026 12:30 Zoom Meeting Link Add to Google Calendar Add to Office365 Calendar Agenda: Admin: Volunteer for taking today’s meeting minutes to post here on the Forum. Brief update from WG co-chairs and ACCESS-NRI: Yi Huang, Charmaine Franklin, Matt Woodhouse, Heidi Nettelbeck (5mins) ACCESS-NRI PhD Internship Program - Applications now open! Heidi Nettelbeck 3-month internship is an opportunity to work alongside ACCESS-NRI staff on activities related to the development, testing, and release of climate models as well as the supporting software and data that underpin them. This is the first of two rounds this year and is open to PhD students from the ANU, UNSW, and the UTas. We expect to open a second internship round later in 2026 that will also include Monash University and the University of Melbourne. Application deadline: 10 April 2026 Machine Learning/Atmosphere Workshop (Melbourne, Aug 2026): Heidi Nettelbeck (10mins) Discussion: Which aspects of ML interests the Atmosphere WG community? (e.g., parameterisation with ML techniques, evaluation aspects of ML to better understand systemic biases, climate projected variables, drivers of climate extremes). Also need clear Aims of workshop. Compute/storage resources: Heidi Nettelbeck (5mins) Any experiment proposals for Q1/2026 (1.5 MSU allocation)? → See here for how to apply for Atmosphere WG Resources. Atmosphere WG co-chair shake-up Matt Woodhouse, Heidi Nettelbeck (5mins) → Are you interested in becoming an Atmosphere WG co-chair? Implementation of aerosol-aware ice nucleation particle (INP) parameterisations in the high-resolution regional UM model over the Southern Ocean Zhangcheng Pei (10mins) Inferring long-term cloud responses to warming from their short-term variability Qinggang Gao, Yi Huang (10mins) A key challenge in climate science remains reducing uncertainties in the estimates of equilibrium climate sensitivity (ECS), typically quantified as the increase in global mean surface air temperature at an equilibrium state after doubling CO2 concentrations. CMIP6 simulations show a wide spread of ECS estimates, with several models exceeding 5 K, which was not observed in earlier CMIP studies. Climate models based on the latest UKMO UM are among the ‘hot’ models with large ECS. Radiative forcings and feedbacks in these models have been investigated, and the large ECS was partly attributed to large positive midlatitude cloud feedback. Recent studies suggest that long-term cloud responses to warming can be inferred from their diurnal cycle and seasonal variations. This work investigates cloud responses to environmental condition changes at diurnal, seasonal, and interannual time scales and their link to longer-term cloud feedback. Qinggang will show results from new ACCESS-AM3 N96 simulations (1982-2012) with the ISCCP and CALIPSO satellite simulators. An SST+4K simulation is run in addition to the control simulation to investigate cloud responses to large-scale forcings. Next Atmosphere WG meeting: April 2026

Applications now open for the ACCESS-NRI PhD Internship Program! This 3-month internship provides an opportunity to work alongside ACCESS-NRI staff on activities related to the development, testing, and release of climate models as well as the supporting software and data that underpin them. This is the first of two rounds this year and is open to PhD students from the Australian National University, UNSW, and the University of Tasmania. We expect to open a second internship round later in 2026 that will also include Monash University and the University of Melbourne. Application deadline: 10 April 2026 Full information and details for this round can be found on the ACCESS-NRI internship webpage.

Atmosphere WG meeting 29.04.2026 For a calendar invite, simply click on the relevant calendar link below When: 29/04/2026 11:30 to 29/04/2026 12:30 Zoom Meeting Link Add to Google Calendar Add to Office365 Calendar Agenda: Admin: Volunteer for taking today’s meeting minutes to post here on the Forum. Brief update from WG co-chairs and ACCESS-NRI: Yi Huang, Charmaine Franklin, Matt Woodhouse, Heidi Nettelbeck (5mins) ACCESS-NRI FY26-27 Work plan: Heidi Nettelbeck First draft released! Seeking feedback from the community - see this announcement. Accessing UKMO licensed models: Heidi Nettelbeck :globe_showing_asia_australia: If you run any ACCESS-NRI supported models: ACCESS-AM, ACCESS-CM, ACCESS-ESM, ACCESS-rAM, or ACCESS-rCM, you will need to agree to the Terms of Use for the new End User Licence Agreement (EULA) with UKMO by 8 May. This EULA allows ACCESS-NRI to distribute proprietary UKMO software to Australian research institutions. For more information, see this ACCESS-Hive forum post. Note: this does not apply to users affiliated with the BoM or CSIRO. ACCESS Community Workshop: Connecting Machine Learning to Earth System Science Heidi Nettelbeck (5mins) Melbourne, 19-21 Aug 2026 → Abstract submissions are now open! See forum post for more information. Now collating ideas for Machine Learning tutorial and breakouts - have your say before 8 May! Do we want to hold our annual Atmosphere WG meeting during this workshop on 21.08.? Atmosphere WG co-chair shake-up Matt Woodhouse (5mins) → Announce new Atmosphere WG co-chairs. AM3 and rAM3 plans Claire Courage and Chermelle Engel (20+5mins) Priorities for the upcoming beta release of ACCESS-AM3 and beyond will be presented along with development plans for ACCESS-rAM3. How AM3, rAM3 and CM3 plans will intertwine on the technical side will also be discussed. rCM3 coupled model development update Ashley Barnes (12+3mins) The prototype rCM3 ‘frankenmodel’ is up and running. Ashley will give an update on work towards the automation of coupled model setup and putting together the first science run. Compute/storage resources: Heidi Nettelbeck (5mins) Any experiment proposals for Q2/2026 (2 MSU allocation)? → See here for how to apply for Atmosphere WG Resources. Atmosphere WG meeting time Matt Woodhouse (5mins) Review if 11:30am Wednesday is still suitable for most or needs changing. Next Atmosphere WG meeting: May 2026

Are you running an ACCESS-NRI supported model? :globe_showing_asia_australia: Are you running any of these ACCESS-NRI supported models: ACCESS-AM, ACCESS-CM, ACCESS-ESM, ACCESS-rAM, or ACCESS-rCM? :globe_showing_asia_australia: :link: UKMO EULA signing page If so, you will need to hold a valid MOSRS account and agree to the Terms of Use for the End User Licence Agreement (EULA) with the UK Met Office (UKMO) that allows ACCESS-NRI to distribute proprietary UKMO software to Australian research institutions. ACCESS-NRI partner universities ANU, UNSW, UTas (including AAD), Monash Uni and UniMelb have recently signed an updated agreement outlining the conditions in this new EULA. Individuals affiliated with these partner universities are now being asked to read and accept the Terms of Use for the Agreement so they can continue accessing UKMO software and documentation. If this applies to you, please complete the UKMO Licensing process by following the steps on the UKMO EULA signing page. For verification purposes, you must have AAF Authentication on your ACCESS-Hive Forum account. Please complete this by 8 May 2026 so that you can continue to use and access UKMO software and licensed material. For more information and FAQs, see the post Accessing UKMO licensed models on the ACCESS-Hive Forum. If you encounter any problems, please send a message to the UKMO_Admin group on the ACCESS-Hive Forum.

!!Reminder: Atmosphere WG meeting 29.04.2026 For a calendar invite, simply click on the relevant calendar link below When: 29/04/2026 11:30 to 29/04/2026 12:30 Zoom Meeting Link Add to Google Calendar Add to Office365 Calendar Agenda: Admin: Volunteer for taking today’s meeting minutes to post here on the Forum. Brief update from WG co-chairs and ACCESS-NRI: Yi Huang, Charmaine Franklin, Matt Woodhouse, Heidi Nettelbeck (5mins) ACCESS-NRI FY26-27 Work plan: Heidi Nettelbeck First draft released! Seeking feedback from the community - see this announcement. Accessing UKMO licensed models: Heidi Nettelbeck :globe_showing_asia_australia: If you run any ACCESS-NRI supported models: ACCESS-AM, ACCESS-CM, ACCESS-ESM, ACCESS-rAM, or ACCESS-rCM, you will need to agree to the Terms of Use for the new End User Licence Agreement (EULA) with UKMO by 8 May. This EULA allows ACCESS-NRI to distribute proprietary UKMO software to Australian research institutions. For more information, see this Hive forum post. Note: this does not apply to users affiliated with the BoM or CSIRO. ACCESS Community Workshop: Connecting Machine Learning to Earth System Science Heidi Nettelbeck (5mins) Melbourne, 19-21 Aug 2026 → Abstract submissions are now open! See forum post for more information. Now collating ideas for Machine Learning tutorial and breakouts - have your say before 3 May! Do we want to hold our annual Atmosphere WG meeting during this workshop on 21 Aug? Atmosphere WG co-chair shake-up Matt Woodhouse (5mins) → Announce new Atmosphere WG co-chairs. AM3 and rAM3 plans Claire Courage and Chermelle Engel (20+5mins) Priorities for the upcoming beta release of ACCESS-AM3 and beyond will be presented along with development plans for ACCESS-rAM3. How AM3, rAM3 and CM3 plans will intertwine on the technical side will also be discussed. rCM3 coupled model development update Ashley Barnes (12+3mins) The prototype rCM3 ‘frankenmodel’ is up and running. Ashley will give an update on work towards the automation of coupled model setup and putting together the first science run. Compute/storage resources: Heidi Nettelbeck (5mins) Any experiment proposals for Q2/2026 (2 MSU allocation)? → See here for how to apply for Atmosphere WG Resources. Atmosphere WG meeting time Matt Woodhouse (5mins) Review if 11:30am Wednesday is still suitable for most or needs changing. Next Atmosphere WG meeting: 27 May 2026

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