Vol. 18, issue 07, article # 11

pdf Demin V. I., Beloglazov M. I., Mokrov E. G. Foehn effects above the Khibiny in changes of the surface ozone concentration. // Atmospheric and oceanic optics. 2005. V. 18. No. 07. P. 551-554.
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We present some results on the surface ozone concentration (SOC) measured on Lovchorr Mountain (at 1089 meters height above sea level (a.s.l.) in the Khibiny mountains) during free foehn periods. It is shown that the foehn occurrence at the observation site is accompanied by synchronous variations of SOC, relative humidity and, to a lesser degree, air temperature. The SOC increase in foehn situations can amount to 10 to 20 ppb and is caused by the intrusion of the air enriched with ozone from the upper atmospheric layers into the surface layer at downwelling airflows in an anticyclone.