Understanding model discrepancies in equatorial Pacific SST patterns using OM2 with ESM forcings.
Ellie Ong
1. Introduction and scientific context – The equatorial Pacific SST warming pattern in ACCESS ESM1.5 does not match observed trends, modelling an El Nino like warming pattern with a weakened zonal temperature gradient, instead of the observed La Nina like warming pattern in recent decades. The El Nino-like warming pattern produced in the ACCESS model is also seen in other CMIP6 models.
2. Methodology/project summary – We aim to run the ocean component of ACCESS-ESM1.5 – ACCESS-OM2 with ESM atmospheric output from the climate projection runs to understand driving factors behind the Pacific SST warming patterns. Individual forcings (e.g. air temperature, wind speeds, radiative fluxes) can then be isolated in different experiments to understand which forcings contribute to different spatial patterns of SST in the equatorial Pacific.
3. Results – We will show the progress made in setting up these experiments should other researchers want to run similar experiments. Preliminary science results on the forcings contributing to the SST warming pattern in the Pacific will also be highlighted.
4. Audience – Tropical climate scientists, ocean modellers who want to run with forcings from ACCESS models.
5. Keywords – Tropical climate variability, running OM with ESM forcings.
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