Coarse dust aerosol radiative effect in the IMPACT model
Abstract
Coarse mineral dust aerosols affect the climate by scattering and absorbing both short-wave and long-wave radiation. However, there are still large uncertainties in radiative effects, in part due to regional heterogeneity of mineral dust. Here, we couple a global chemical transport model (IMPACT) with a radiative transfer module (RRTMG) in conjunction with the Dust Constraints from joint Observational-Modelling-Experimental analysis (DustCOMM) data set to estimate the radiative effects of mineral dust. The model results suggest that coarse mineral dust substantially contributes to a warming effect at the top of the atmosphere over the source regions. Additional sensitivity simulations were performed to investigate the sensitivity of the radiative effects to some key parameters such as the dust asphericity and iron oxides.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2020
- Bibcode:
- 2020AGUFMA007.0015I
- Keywords:
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- 0305 Aerosols and particles;
- ATMOSPHERIC COMPOSITION AND STRUCTURE;
- 3305 Climate change and variability;
- ATMOSPHERIC PROCESSES;
- 3322 Land/atmosphere interactions;
- ATMOSPHERIC PROCESSES;
- 1622 Earth system modeling;
- GLOBAL CHANGE