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Aerosol Impacts on Deep Convection

Aerosol Impacts on Deep Convection. Severe Storms and Tropical Cyclones. Rainfall . Having more aerosols in the atmosphere does not result in a net increase in rainfall Can lead to convective decoupling Therefore leading to a decrease in rainfall

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Aerosol Impacts on Deep Convection

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  1. Aerosol Impacts on Deep Convection Severe Storms and Tropical Cyclones

  2. Rainfall • Having more aerosols in the atmosphere does not result in a net increase in rainfall • Can lead to convective decoupling • Therefore leading to a decrease in rainfall • Very large amounts of pollution aerosols decreased ice riming in Houston (Carri) • Enhanced rainfall in the first 2 hours of formation (Heever 2006) • Rainfall inhibited afterwards

  3. Aerosol Impacts on Hail • Hail size increases with a higher concentration of CCN’s (AdrienLouftu’s dissertation) • Pollution and dust increase the formation of large hail

  4. Aerosol Impacts on Tornados • Conducted two simulations of idealized supercells • 1st: Polluted simulation formed an EF-1 tornado • 2nd: resulted in finding out that CAPE and low-level moisture was more important for formation than aerosols

  5. Aerosol Impacts on TC’s • Pollution sized aerosols in a hurricane can weaken the storm • Idealized Examples: • The more CCN’s the more the storm weakened • BUT: • Typhoon in the Pacific that it’s path went through pollution that was suck into the center of the storm, not causing a weakening.

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