Abstract:

A case of abrupt and significant increase of surface ozone was examined, which is recorded during the night of October 9th, 2003, over the area of the Thriassion Plain - Greece, being accompanied by the occurrence of a wind outbreak during the same period. As this increase cannot be explained by the ordinary diurnal evolution of tropospheric ozone concentration, the possibility of downward stratospheric ozone transport was investigated. It was indeed found that the case is associated with tropopause folding and subsequent stratospheric air intrusion in the upper troposphere over Greece. With the aid of mesoscale modeling, being also supported by the hydraulic theory, it was found that the intense wind outbreak is associated with the development of disturbances in the lee side of the neighbouring mountain ranges. These disturbances contribute to the free troposphere - atmospheric boundary layer interaction, facilitating the transportation of stratospheric air close to the surface, thus resulting to the observed tropospheric ozone increase. © 2010 Gebrüder Borntraeger, Berlin, Stuttgart.

Notes:

cited By (since 1996)1

Website