Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 35, Issue 23, Pages -Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1029/2008GL035617
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- National Science Foundation (NSF) [0638910]
- Div Atmospheric & Geospace Sciences
- Directorate For Geosciences [0638910] Funding Source: National Science Foundation
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Numerical simulations of an idealized supercell thunderstorm were performed to assess effects of increased aerosol concentrations acting as cloud condensation nuclei (CCN) and giant CCN (GCCN) on tornadogenesis. Initial background profiles of CCN and GCCN concentrations were set to represent clean'' continental and aerosol-polluted environments, respectively. With a reduction in warm- and cold-rain processes, the polluted environment produced a longer-lived supercell with a well-defined rear flank downdraft (RFD) and relatively weak forward flank downdraft (FFD) that produced weak evaporative cooling, a weak cold pool, and an EF-1 tornado. The clean environment produced no tornado and was less favorable for tornadogenesis. Citation: Lerach, D. G., B. J. Gaudet, and W. R. Cotton (2008), Idealized simulations of aerosol influences on tornadogenesis, Geophys. Res. Lett., 35, L23806, doi:10.1029/2008GL035617.
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