# \#atmosphere **URL:** https://forum.access-hive.org.au/tag/atmosphere/176.md [Latest](https://forum.access-hive.org.au/latest.md) · [Categories](https://forum.access-hive.org.au/categories.md) · [Tags](https://forum.access-hive.org.au/tags.md) --- ## [Meeting Minutes 2026: Atmosphere Working Group](https://forum.access-hive.org.au/t/meeting-minutes-2026-atmosphere-working-group/6284)
**Author:** [@cnf](https://forum.access-hive.org.au/u/cnf)\ **Replies:** 12\ **Last updated:** [21 October 2026 04:27 UTC](https://forum.access-hive.org.au/t/meeting-minutes-2026-atmosphere-working-group/6284 "2026-10-21T04:27:10Z")
Atmosphere WG meeting minutes 25/02/2026 18 participants on Zoom ACCESS-NRI workplan Claire Courage Asking for community input for the new FY plan - what could/should ACCESS-NRI work on that would most benefit the com… --- ## [ACCESS-rAM3 2.0-beta Feedback](https://forum.access-hive.org.au/t/access-ram3-2-0-beta-feedback/5675)
**Author:** [@heidi](https://forum.access-hive.org.au/u/heidi)\ **Replies:** 13\ **Last updated:** [3 September 2026 00:29 UTC](https://forum.access-hive.org.au/t/access-ram3-2-0-beta-feedback/5675 "2026-09-03T00:29:11Z")
About This topic is a catch-all location for feedback for the ACCESS-rAM3 2.0-beta Release. Please reply to this topic if you have feedback on the ACCESS-rAM3 2.0-beta. Feedback can be to point out problems encountered,… --- ## [ACCESS-rAM3 2.0-alpha Feedback](https://forum.access-hive.org.au/t/access-ram3-2-0-alpha-feedback/5402)
**Author:** [@Aidan](https://forum.access-hive.org.au/u/Aidan)\ **Replies:** 5\ **Last updated:** [2 February 2026 03:49 UTC](https://forum.access-hive.org.au/t/access-ram3-2-0-alpha-feedback/5402 "2026-02-02T03:49:33Z")
About This topic is a catch-all location for feedback for the ACCESS-rAM3 2.0 Alpha Release. Please reply to this topic if you have feedback on the ACCESS-rAM3 Alpha. Feedback can be to point out problems encountered, o… --- ## [Running complex numpy-based code in parallel with xarray/dask](https://forum.access-hive.org.au/t/running-complex-numpy-based-code-in-parallel-with-xarray-dask/5377)
**Author:** [@robwarren](https://forum.access-hive.org.au/u/robwarren)\ **Replies:** 10\ **Last updated:** [15 October 2025 23:17 UTC](https://forum.access-hive.org.au/t/running-complex-numpy-based-code-in-parallel-with-xarray-dask/5377 "2025-10-15T23:17:47Z")
Background I have written a Python library called atmos for performing thermodynamic calculations and deriving various convective parameters. The code works with numpy arrays and is designed to perform calculations in… --- ## [Experiment Proposal: Extending sensitivity tests on marine low cloud and radiation bias in BARRA-C2 (4.4km, RAL3.2)](https://forum.access-hive.org.au/t/experiment-proposal-extending-sensitivity-tests-on-marine-low-cloud-and-radiation-bias-in-barra-c2-4-4km-ral3-2/5231)
**Author:** [@qinggangg](https://forum.access-hive.org.au/u/qinggangg)\ **Replies:** 8\ **Last updated:** [16 September 2025 00:01 UTC](https://forum.access-hive.org.au/t/experiment-proposal-extending-sensitivity-tests-on-marine-low-cloud-and-radiation-bias-in-barra-c2-4-4km-ral3-2/5231 "2025-09-16T00:01:21Z")
It is an extension to the previous experiments proposed here Summary We found that reducing a key parameter Cloud Droplet Number Concentration (CDNC) can reduce model bias in low clouds and radiation for a case study p… --- ## [ACCESS-rAM3 Release 1.0 Feedback](https://forum.access-hive.org.au/t/access-ram3-release-1-0-feedback/4459)
**Author:** [@heidi](https://forum.access-hive.org.au/u/heidi)\ **Replies:** 18\ **Last updated:** [16 July 2025 05:16 UTC](https://forum.access-hive.org.au/t/access-ram3-release-1-0-feedback/4459 "2025-07-16T05:16:44Z")
About This topic is a catch-all location for feedback for the ACCESS-rAM3 Release 1.0. Please reply to this topic if you have feedback on the ACCESS-rAM3 release. Feedback can be to point out problems encountered, or po… --- ## [How do I plot a streamfunction for the UM?](https://forum.access-hive.org.au/t/how-do-i-plot-a-streamfunction-for-the-um/4685)
**Author:** [@jemmajeffree](https://forum.access-hive.org.au/u/jemmajeffree)\ **Replies:** 1\ **Last updated:** [15 July 2025 00:15 UTC](https://forum.access-hive.org.au/t/how-do-i-plot-a-streamfunction-for-the-um/4685 "2025-07-15T00:15:11Z")
In theory I understand how streamfunctions work, but I’m having trouble migrating from ocean-model-land (where velocities are defined in m/s, and model levels are in m) to UM-atmosphere-model-land (where vertical velocit… --- ## [Experiment Proposal: Sensitivity tests on marine low cloud and radiation bias in BARRA-C2 (4.4km, RAL3.2)](https://forum.access-hive.org.au/t/experiment-proposal-sensitivity-tests-on-marine-low-cloud-and-radiation-bias-in-barra-c2-4-4km-ral3-2/4615)
**Author:** [@qinggangg](https://forum.access-hive.org.au/u/qinggangg)\ **Replies:** 0\ **Last updated:** [14 June 2025 01:06 UTC](https://forum.access-hive.org.au/t/experiment-proposal-sensitivity-tests-on-marine-low-cloud-and-radiation-bias-in-barra-c2-4-4km-ral3-2/4615 "2025-06-14T01:06:22Z")
Using ACCESS-rAM3 to investigate the impact of model resolution and key parameters on profound marine low cloud and top of atmosphere upward shortwave radiation bias in BARRA-C2. Scientific justification: We found prof… --- ## [ACCESS-rAM3 Beta Feedback](https://forum.access-hive.org.au/t/access-ram3-beta-feedback/4305)
**Author:** [@Aidan](https://forum.access-hive.org.au/u/Aidan)\ **Replies:** 25\ **Last updated:** [22 April 2025 04:44 UTC](https://forum.access-hive.org.au/t/access-ram3-beta-feedback/4305 "2025-04-22T04:44:15Z")
About This topic is a catch-all location for feedback for the ACCESS-rAM3 Beta Release. Please reply to this topic if you have feedback on the ACCESS-rAM3 Beta. Feedback can be to point out problems encountered, or posi… --- ## [Is there an ACCESS-AM3 prototype available?](https://forum.access-hive.org.au/t/is-there-an-access-am3-prototype-available/4146)
**Author:** [@alanah.chapman](https://forum.access-hive.org.au/u/alanah.chapman)\ **Replies:** 2\ **Last updated:** [25 February 2025 04:24 UTC](https://forum.access-hive.org.au/t/is-there-an-access-am3-prototype-available/4146 "2025-02-25T04:24:55Z")
Hi! I was hoping to get some information about whether there is a prototype version of ACCESS-AM3 that could be run in present day that I could run and potentially compare with ACCESS-AM2 outputs - I am planning to look… --- ## [ACCESS-CM2/AM2 DMS Ancillary file error](https://forum.access-hive.org.au/t/access-cm2-am2-dms-ancillary-file-error/2129)
**Author:** [@sonyafiddes](https://forum.access-hive.org.au/u/sonyafiddes)\ **Replies:** 7\ **Last updated:** [24 February 2025 03:14 UTC](https://forum.access-hive.org.au/t/access-cm2-am2-dms-ancillary-file-error/2129 "2025-02-24T03:14:08Z")
Hello, I have recently been looking at the aerosol fields in ACCESS-AM2. Following some interesting results I was digging in to the DMS ancillary files and have found that the ancillary file that the model is pointing t… --- ## [Um2nc: a utility for converting Unified Model files to netCDF](https://forum.access-hive.org.au/t/um2nc-a-utility-for-converting-unified-model-files-to-netcdf/3968)
**Author:** [@spencerwong](https://forum.access-hive.org.au/u/spencerwong)\ **Replies:** 0\ **Last updated:** [5 December 2024 04:12 UTC](https://forum.access-hive.org.au/t/um2nc-a-utility-for-converting-unified-model-files-to-netcdf/3968 "2024-12-05T04:12:00Z")
To receive email notifications when a new release is announced, please \[watch\] this topic. um2nc :rocket: Release: 1.0.0 um2nc is a Python utility for converting Unified Model (UM) data files to netCDF. um2nc is deve… --- ## [Meeting Minutes 2024: Atmosphere Working Group (Archived)](https://forum.access-hive.org.au/t/meeting-minutes-2024-atmosphere-working-group-archived/664)
**Author:** [@heidi](https://forum.access-hive.org.au/u/heidi)\ **Replies:** 8\ **Last updated:** [4 December 2024 04:33 UTC](https://forum.access-hive.org.au/t/meeting-minutes-2024-atmosphere-working-group-archived/664 "2024-12-04T04:33:25Z")
Notes from each meeting of the Atmosphere Working Group held in 2024 are added as a reply to this topic. Make each reply a wiki post , that way other attendees can edit the notes. This can greatly reduce the burden of n… --- ## [Provenance of ACCESS-ESM1.5 UM ancillary data](https://forum.access-hive.org.au/t/provenance-of-access-esm1-5-um-ancillary-data/3800)
**Author:** [@paulleopardi](https://forum.access-hive.org.au/u/paulleopardi)\ **Replies:** 6\ **Last updated:** [8 November 2024 05:17 UTC](https://forum.access-hive.org.au/t/provenance-of-access-esm1-5-um-ancillary-data/3800 "2024-11-08T05:17:01Z")
This topic is a placeholder for draft documentation on the origin and pre-processing of the atmosphere ancillary files that are listed in the Payu configurations of the ACCESS-ESM1.5 release. --- ## [Joint development of the regional nesting suite](https://forum.access-hive.org.au/t/joint-development-of-the-regional-nesting-suite/3631)
**Author:** [@EmmaHoward](https://forum.access-hive.org.au/u/EmmaHoward)\ **Replies:** 3\ **Last updated:** [15 October 2024 23:09 UTC](https://forum.access-hive.org.au/t/joint-development-of-the-regional-nesting-suite/3631 "2024-10-15T23:09:29Z")
We held a breakout session on Australian suite development in the RNS at the 2024 ACCESS-NRI workshop. This thread is to document the discussion and actions following the session. The session discussed the means by whic… --- ## [ACCESS-CM2 perturbed initial conditions not applying in all cases](https://forum.access-hive.org.au/t/access-cm2-perturbed-initial-conditions-not-applying-in-all-cases/1955)
**Author:** [@sebmckenna](https://forum.access-hive.org.au/u/sebmckenna)\ **Replies:** 3\ **Last updated:** [16 April 2024 00:50 UTC](https://forum.access-hive.org.au/t/access-cm2-perturbed-initial-conditions-not-applying-in-all-cases/1955 "2024-04-16T00:50:07Z")
Hi all, I am running some experiments with ensemble members in ACCESS-CM2. To branch ensemble members I have used the perturbIC\_MD.py script in my git repo here: GitHub - SebastianMckenna/perturb\_access: perturbing ACC… --- ## [Experiment Proposal: Simulating Ash Wednesday fire weather using AUS2200](https://forum.access-hive.org.au/t/experiment-proposal-simulating-ash-wednesday-fire-weather-using-aus2200/883)
**Author:** [@Yi\_Huang](https://forum.access-hive.org.au/u/Yi_Huang)\ **Replies:** 0\ **Last updated:** [23 June 2023 00:55 UTC](https://forum.access-hive.org.au/t/experiment-proposal-simulating-ash-wednesday-fire-weather-using-aus2200/883 "2023-06-23T00:55:32Z")
Lead Investigator: Dr Hooman Ayat The purpose of the proposed experiment is to simulate and study the Ash Wednesday fire weather in Victoria in 1983. This is part of a bigger project to investigate the key drying mechan… --- ## [Experiment Proposal: ACCESS-AM2 sea spray flux parameterisation experiment](https://forum.access-hive.org.au/t/experiment-proposal-access-am2-sea-spray-flux-parameterisation-experiment/1966)
**Author:** [@sonyafiddes](https://forum.access-hive.org.au/u/sonyafiddes)\ **Replies:** 1\ **Last updated:** [26 March 2024 00:51 UTC](https://forum.access-hive.org.au/t/experiment-proposal-access-am2-sea-spray-flux-parameterisation-experiment/1966 "2024-03-26T00:51:29Z")
ACCESS-AM2 sea spray flux parameterisation experiment : We have changed the sea spray flux parameterisation in ACCESS-AM2 to use wind gust instead of mean wind fields, in an effort in increase the aerosol number concentr… --- ## [Applying for Atmosphere WG Resources](https://forum.access-hive.org.au/t/applying-for-atmosphere-wg-resources/844)
**Author:** [@heidi](https://forum.access-hive.org.au/u/heidi)\ **Replies:** 0\ **Last updated:** [13 June 2023 01:14 UTC](https://forum.access-hive.org.au/t/applying-for-atmosphere-wg-resources/844 "2023-06-13T01:14:42Z")
Introduction ACCESS-NRI allocates compute and storage resources to the Working Groups (WGs) to use to support their activities. Currently, those resources consist of computational resources (KSUs) and storage (/g/data a… --- ## [Job opportunity: Postdoc position applying Machine Learning in Climate Models](https://forum.access-hive.org.au/t/job-opportunity-postdoc-position-applying-machine-learning-in-climate-models/1793)
**Author:** [@Aidan](https://forum.access-hive.org.au/u/Aidan)\ **Replies:** 0\ **Last updated:** [7 February 2024 22:37 UTC](https://forum.access-hive.org.au/t/job-opportunity-postdoc-position-applying-machine-learning-in-climate-models/1793 "2024-02-07T22:37:38Z")
Postdoctoral Opportunity in Machine Learning in Climate Models Opportunities for postdoctoral research in applying machine learning techniques in climate models was posted on the MOM modelling google group Dear colleag… --- ## [Static model input data at NCI: issues and requirements](https://forum.access-hive.org.au/t/static-model-input-data-at-nci-issues-and-requirements/1576)
**Author:** [@paulleopardi](https://forum.access-hive.org.au/u/paulleopardi)\ **Replies:** 0\ **Last updated:** [3 November 2023 06:19 UTC](https://forum.access-hive.org.au/t/static-model-input-data-at-nci-issues-and-requirements/1576 "2023-11-03T06:19:50Z")
I have updated an issues and requirements page that addresses static model input data at NCI, including UM ancillary files. The page now suggests some next steps, including approaches to sharing, cataloguing and provena… --- ## [Poster: Multiweek prediction & Attribution of the Black Saturday heatwave event in south-eastern Australia](https://forum.access-hive.org.au/t/poster-multiweek-prediction-attribution-of-the-black-saturday-heatwave-event-in-south-eastern-australia/1273)
**Author:** [@eunpalim](https://forum.access-hive.org.au/u/eunpalim)\ **Replies:** 2\ **Last updated:** [6 September 2023 02:45 UTC](https://forum.access-hive.org.au/t/poster-multiweek-prediction-attribution-of-the-black-saturday-heatwave-event-in-south-eastern-australia/1273 "2023-09-06T02:45:22Z")
Title Multiweek prediction & Attribution of the Black Saturday heatwave event in south-eastern Australia About The Black Saturday heatwave event that occurred in late January-early February of year 2009 resulted in hund… --- ## [A global discrepancy in atmospheric water vapor trends between models and observations](https://forum.access-hive.org.au/t/a-global-discrepancy-in-atmospheric-water-vapor-trends-between-models-and-observations/1202)
**Author:** [@Aidan](https://forum.access-hive.org.au/u/Aidan)\ **Replies:** 0\ **Last updated:** [31 August 2023 07:22 UTC](https://forum.access-hive.org.au/t/a-global-discrepancy-in-atmospheric-water-vapor-trends-between-models-and-observations/1202 "2023-08-31T07:22:56Z")
Title A global discrepancy in atmospheric water vapor trends between models and observations Speaker Isla Simpson, NCAR Recording Location Weston Theatre (and online). See the main workshop help topic for… --- ## [Poster: The Climate & Fluid Physics Laboratory](https://forum.access-hive.org.au/t/poster-the-climate-fluid-physics-laboratory/1174)
**Author:** [@kial](https://forum.access-hive.org.au/u/kial)\ **Replies:** 1\ **Last updated:** [5 September 2023 07:26 UTC](https://forum.access-hive.org.au/t/poster-the-climate-fluid-physics-laboratory/1174 "2023-09-05T07:26:50Z")
Title The Climate & Fluid Physics Laboratory About Laboratory experiments improve our understanding of Earth’s climate system. Poster Note: this topic is part of the 2023 ACCESS Community Workshop Poster session --- ## [Poster: Accelerating climate models using an AI surrogate](https://forum.access-hive.org.au/t/poster-accelerating-climate-models-using-an-ai-surrogate/1260)
**Author:** [@abhnil](https://forum.access-hive.org.au/u/abhnil)\ **Replies:** 0\ **Last updated:** [4 September 2023 11:36 UTC](https://forum.access-hive.org.au/t/poster-accelerating-climate-models-using-an-ai-surrogate/1260 "2023-09-04T11:36:53Z")
Title Accelerating climate models using an AI surrogate About We accelerate Community Atmospheric Model (CAM) simulations by replacing the moist physics and radiation with an AI surrogate using a novel python-fortran br… --- ## [Poster: Potential to Enhance Subseasonal Forecast Skill of Precipitation using Water Vapour Transport in ACCESS-S2](https://forum.access-hive.org.au/t/poster-potential-to-enhance-subseasonal-forecast-skill-of-precipitation-using-water-vapour-transport-in-access-s2/1239)
**Author:** [@Kim\_Reid](https://forum.access-hive.org.au/u/Kim_Reid)\ **Replies:** 0\ **Last updated:** [4 September 2023 04:10 UTC](https://forum.access-hive.org.au/t/poster-potential-to-enhance-subseasonal-forecast-skill-of-precipitation-using-water-vapour-transport-in-access-s2/1239 "2023-09-04T04:10:17Z")
Title Potential to Enhance Subseasonal Forecast Skill of Precipitation using Water Vapour Transport in ACCESS-S2 Poster ACCESS\_lightning\_KReid.pptx (1.5 MB) Note: this topic is part of the 2023 ACCESS Community Work… --- ## [Poster: Assessment of the National Analysis System](https://forum.access-hive.org.au/t/poster-assessment-of-the-national-analysis-system/1238)
**Author:** [@monika.krysta](https://forum.access-hive.org.au/u/monika.krysta)\ **Replies:** 0\ **Last updated:** [4 September 2023 03:04 UTC](https://forum.access-hive.org.au/t/poster-assessment-of-the-national-analysis-system/1238 "2023-09-04T03:04:34Z")
ACCESS-NRI\_5Sept2023-MonikaKrysta.pptx (1.1 MB) Note: this topic is part of the 2023 ACCESS Community Workshop Poster session --- ## [Poster: Understanding Southern Ocean cloud radiative biases in the ACCESS-AM2 model](https://forum.access-hive.org.au/t/poster-understanding-southern-ocean-cloud-radiative-biases-in-the-access-am2-model/1231)
**Author:** [@sonyafiddes](https://forum.access-hive.org.au/u/sonyafiddes)\ **Replies:** 0\ **Last updated:** [3 September 2023 23:07 UTC](https://forum.access-hive.org.au/t/poster-understanding-southern-ocean-cloud-radiative-biases-in-the-access-am2-model/1231 "2023-09-03T23:07:01Z")
Title Understanding Southern Ocean cloud radiative biases in the ACCESS-AM2 model About We present two papers on evaluating the ACCESS-AM2 cloud-radiative bias over the Southern Ocean as well as present a new method for… --- ## [Evaluation and Future Projections of Heatwaves in the ACCESS-ESM1.5 large ensemble](https://forum.access-hive.org.au/t/evaluation-and-future-projections-of-heatwaves-in-the-access-esm1-5-large-ensemble/1223)
**Author:** [@jatin](https://forum.access-hive.org.au/u/jatin)\ **Replies:** 0\ **Last updated:** [2 September 2023 05:34 UTC](https://forum.access-hive.org.au/t/evaluation-and-future-projections-of-heatwaves-in-the-access-esm1-5-large-ensemble/1223 "2023-09-02T05:34:40Z")
Title Poster: Evaluation and Future Projections of Heatwaves in the ACCESS-ESM1.5 large ensemble About This poster is about atmospheric heatwaves in the ACCESS-ESM1.5 large ensemble. Poster Note: this topic is p… --- ## [Poster: Local rainfall response to the Madden Julian Oscillation using AUS2200 simulations](https://forum.access-hive.org.au/t/poster-local-rainfall-response-to-the-madden-julian-oscillation-using-aus2200-simulations/1221)
**Author:** [@thiland](https://forum.access-hive.org.au/u/thiland)\ **Replies:** 0\ **Last updated:** [1 September 2023 10:10 UTC](https://forum.access-hive.org.au/t/poster-local-rainfall-response-to-the-madden-julian-oscillation-using-aus2200-simulations/1221 "2023-09-01T10:10:10Z")
Title Local rainfall over north Queensland response to the Madden Julian Oscillation using AUS2200 simulations About Every catastrophic rainfall event has a unique footprint, in terms of the spatial and temporal spread … [Next page](https://forum.access-hive.org.au/tag/atmosphere/176.md?match_all_tags=true&page=1&tags%5B%5D=atmosphere)