Physics
Scientific paper
Mar 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3505807a&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 5, CiteID L05807
Physics
18
Atmospheric Composition And Structure: Middle Atmosphere: Composition And Chemistry, Atmospheric Processes: Atmospheric Electricity, Atmospheric Processes: Remote Sensing
Scientific paper
The local chemical impact of sprites is investigated for the first time. This study is motivated by the current understanding of the streamer nature of sprites: streamers are known to produce NOx, thus sprites are expected to lead to a local enhancement of the background abundances, and possibly impact ozone. We adopted the following strategy: middle atmosphere MIPAS/GMTR NO2 satellite measurements were correlated with ground-based WWLLN detections of large tropospheric thunderstorms as a proxy for sprite activity. We found no evidence of any significant impact at a global scale, but an indication of a possible sprite induced NO2 enhancement of about 10% at 52 km height in correspondence with active thunderstorms. This local enhancement appears to increase with height from a few percent at 47 km to tens of percent at 60 km.
Arnold Neil F.
Arnone Enrico
Carlotti Massimo
Enell Carl-Fredrik
Kero Antti
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