Including Aerosols in Photorate Calculations in CESM2 for Volcano Simulations
Abstract
Omission of aerosols in photorate calculations has been a limiting flaw of the state-of-the-art aerosol chemistry climate models used for studies on geoengineering, nuclear winter and volcanic impacts on climate. CESM2 now has an updated photorate code that includes aerosols. In this study, we look at what this change does to volcano simulations. First, we re-run the 1815 Mt. Tambora simulations from the VolMIP experimental protocol settings in CESM2-WACCM, but this time using the updated photorate code. The purpose of this exercise is to compare changes to resultant aerosol size distributions, stratospheric sulfate burden, and aerosol optical depth for an idealized large stratospheric eruption without being biased by observational constraints. Next, we run simulations of more recent volcanic events, such as the 2014 eruption of Mt. Kelud, to see if the updated photorate code aids in matching observations.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFM.V23F0262C
- Keywords:
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- 4314 Mathematical and computer modeling;
- NATURAL HAZARDS;
- 8414 Eruption mechanisms and flow emplacement;
- VOLCANOLOGY;
- 8428 Explosive volcanism;
- VOLCANOLOGY;
- 8445 Experimental volcanism;
- VOLCANOLOGY