Weekly cycle of lightning: Evidence of storm invigoration by pollution

Details Weekly cycle of lightning: Evidence of storm invigoration by pollution Weekly cycle of lightning: Evidence of storm invigoration by pollution

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3623805b&link_type=abstract

Geophysical Research Letters, Volume 36, Issue 23, CiteID L23805

Other

5

Hydrology: Anthropogenic Effects (4802, 4902), Atmospheric Processes: Clouds And Aerosols, Atmospheric Composition And Structure: Pollution: Urban And Regional (0305, 0478, 4251), Atmospheric Processes: Climate Change And Variability (1616, 1635, 3309, 4215, 4513), Atmospheric Processes: Lightning

Scientific paper

We have examined summertime 1998-2009 U.S. lightning data from the National Lightning Detection Network (NLDN) to look for weekly cycles in lightning activity. As was found by Bell et al. (2008) for rain over the southeast U.S., there is a significant weekly cycle in afternoon lightning activity that peaks in the middle of the week there. The weekly cycle appears to be reduced over population centers. Lightning activity peaks on weekends over waters near the SE U.S. The statistical significance of weekly cycles over the western half of the country is generally small. We found no evidence of a weekly cycle of synoptic-scale forcing that might explain these patterns. The lightning behavior is entirely consistent with the explanation suggested by Bell et al. (2008) for the cycles in rainfall and other atmospheric data from the SE U.S., that aerosols can cause storms to intensify in humid, convectively unstable environments.

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