Evaluating the Australian climate model ACCESS-CM2 against marine aerosol observations


Sonya Fiddes (AAPP)

Project description:

Aerosol, tiny solid or liquid particles suspended in the atmosphere, are one of the most uncertain aspects of climate modelling, having an important influence on the simulation of clouds and radiation (IPCC AR5, WG1, Ch8, 2013). Marine aerosol, such as sea salt or biogenic aerosol, make up a large part of this uncertainty (Carslaw et al. 2013, Nature).

Over the last five years, numerous observations have been made of marine aerosol, providing an opportunity to evaluate models with recent and high-quality data. The new generation Australian Community Climate and Earth System Simulator - Coupled Model 2 (ACCESS-CM2) model has an online aerosol scheme which can simulate the formation and influence of aerosol (Bi et al. 2020, JSHESS).

This project will evaluate the ACCESS-CM2 aerosol output against the recent field observations in order to understand how well the model is able to simulate aerosol variability and where the model might be improved.

Authorised by the Executive Director, Institute for Marine and Antarctic Studies
November 26, 2020