# Experiment proposal: 6-year ACCESS-AM3 N96 simulation with climatological aerosol and SST+4K

**URL:** <https://forum.access-hive.org.au/t/experiment-proposal-6-year-access-am3-n96-simulation-with-climatological-aerosol-and-sst-4k/5804>\
**Category:** Experiments\
**Tags:** experiment-proposal\
**Created:** [20 January 2026 23:28 UTC](https://forum.access-hive.org.au/t/experiment-proposal-6-year-access-am3-n96-simulation-with-climatological-aerosol-and-sst-4k/5804 "2026-01-20T23:28:54Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![qinggangg](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/qinggangg/32/4460_2.png) [@qinggangg](https://forum.access-hive.org.au/u/qinggangg)\
**Post date:** [20 January 2026 23:28 UTC](https://forum.access-hive.org.au/t/experiment-proposal-6-year-access-am3-n96-simulation-with-climatological-aerosol-and-sst-4k/5804/1 "2026-01-20T23:28:54Z")

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**Experiment title 🔔:** 6-year ACCESS-AM3 N96 simulation with climatological aerosol and SST+4K

**Summary 🔔:** Cloud feedback remains the leading source of uncertainty in estimating equilibrium climate sensitivity (ECS). Given large ECS in ACCESS-CM3 and UK models employing the latest UM, it is instrumental to investigate cloud responses to evolving environmental conditions in these models. Here we choose to focus on ACCESS-AM3, the atmospheric component of these model, to elucidate the role of clouds in the model responses to radiative forcing. We have run three 6-year AMIP-style simulations (control, SST+4K, climatological aerosols) from 1982-1987, and this proposal aims to run another simulation with both climatological aerosols and SST+4K. The output variables have been carefully checked in the previous simulations, and this new set of simulation will allow us to investigate model responses to radiative forcings under different present-climate conditions. This is a follow-up to a previous [experiment proposal](https://forum.access-hive.org.au/t/experiment-proposal-amip-style-access-am3-5-year-spin-up-n96-simulation/5653).

**Scientific motivation:** There are large bias in radiation and clouds in CM2 and ESM1.5. It is important to have a closer examination on individual physical processes using atmospheric only simulations.

**Experiment Name 🔔:** am3-climaerop4k   
**People 🔔:** Qinggang Gao, Yi Huang   
**Model:** ACCESS-AM3   
**Configuration:** [https://github.com/ACCESS-NRI/access-am3-configs](https://github.com/ACCESS-NRI/access-am3-configs)  
**Initial conditions:** Default   
**Run plan:** 1 simulation, 6-year, N96 resolution   
**Simulation details:** 1982-1987, global   
**Total KSUs required 🔔:** 60 KSU   
**Total storage required 🔔:** 1.5TB   
**Outputs:** /home/563/qg8515/scratch/cylc-run/   
**Restarts:** Default   
**Related articles:**  
**Analysis:**

**Conclusion:**