Other
Scientific paper
Nov 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3421806y&link_type=abstract
Geophysical Research Letters, Volume 34, Issue 21, CiteID L21806
Other
3
Atmospheric Processes: Atmospheric Electricity, Atmospheric Processes: Lightning, Atmospheric Processes: Climate Change And Variability (1616, 1635, 3309, 4215, 4513), Atmospheric Processes: Convective Processes
Scientific paper
The remarkable contrasts between El Niño and La Niña in the East/Southeast Asia region and the western Pacific region are reported. One is that the lightning flash rate in the East/Southeast Asia region shows a clear inverse correlation with the Southern Oscillation Index (SOI). The lightning activity increases during the El Niño period and decrease during the La Niña period in this area. The other is that the contrast of the areal distribution of the variation of the flash rate in the western Pacific region. During the El Niño period the moist air from the ocean is warmed over the land, and that makes strong updrafts in high-pressure systems over the oceanic area. As a result, well-developed cumulonimbus with frequent lightning activity is observed in the coastal area. During the La Niña period, low-pressure systems on the land cause the increase of rainfall frequency with less lightning activity.
Kawasaki Zen
Morimoto Takahiro
Ushio Tomo-o.
Yoshida Shin'ichirou
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