Time: Wednesday, March 25th at 11 am ET
Location: Monell Auditorium
Title: To what extent are tropical cyclones shaped by aerosols?
Abstract: Aerosols can influence tropical cyclones (TC) through aerosol–cloud interactions (ACI): acting as cloud condensation nuclei, aerosols modify cloud microphysics and eventually modify convection. Atmospheric aerosol concentrations are projected to decline in the future due to reductions in anthropogenic emissions. However, the effect of the overall aerosol decline on TCs is still unclear.
We conduct convection-permitting ensemble simulations of the 2005 North Atlantic TC season using the ICON model. Aerosols are uniformly prescribed at varying concentrations, enabling TCs to develop under clean, intermediate, and polluted conditions. Storm evolution and structural changes from the developing stage to peak intensity across three aerosol regimes are analyzed using a newly developed symmetrized-normalized cyclone (SyNC) composite framework. This framework aligns eyewalls and storm boundaries across TC groups, what preserves small-scale TC structures, particularly within the eyewall region and facilitates analysis of cloud microphysical properties and associated latent heating within TCs.
The aim is to better understand the role of aerosols in TCs and how underlying cloud microphysical processes respond to aerosol perturbations. This understanding provides valuable insights for future TC risk assessments and forecasting.
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https://columbiauniversity.zoom.us/j/93789589681?pwd=ceyYxj4HbQWibD9Q4QLraL8lRARlfF.1
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Passcode: 369299
