Evaluating natural aerosol and trace gases in ESMs

Aerosol Eruptions

Evaluating natural aerosol and trace gases in ESMs

This WP will evaluate natural aerosol and trace gas processes in ESMs, including the development of new metrics and evaluation tools. There are three main aims: (i) evaluate model aerosol state and variability generated by new Earth system couplings developed in WP3; (ii) assess the ability of models to simulate the pristine (baseline) aerosol and chemistry state under conditions that represent as closely as possible the pre-industrial era; and (iii) assess the ability of models to capture variability in natural aerosols and trace gases driven by variations in natural processes. Evaluation will focus on emissions and atmospheric processing of natural aerosols (sea spray, dust, wildfire carbonaceous particles, DMS, secondary organic aerosol from terrestrial biogenic emissions) and trace gases (methane and carbon dioxide). Suitable top-down and key process-oriented diagnostics and performance metrics for evaluating natural aerosol and trace gas processes in ESMs will be integrated into ESMValTool.