P. Bonasoni et al., Stratosphere-troposphere exchanges: case studies recorded at Mt. Cimone during VOTALP project, PHYS CH P C, 24(5), 1999, pp. 443-446
Citations number
8
Categorie Soggetti
Earth Sciences
Journal title
PHYSICS AND CHEMISTRY OF THE EARTH PART C-SOLAR-TERRESTIAL AND PLANETARY SCIENCE
In order to point out and study transports of ozone rich air masses in the
lower troposphere from the stratosphere/upper troposphere, continuous measu
rements of several parameters have been undertaken at Mt. Cimone during the
European Community VOTALP project (Vertical Ozone Transport in the Alps).
Several high values of surface ozone concentration due to vertical stratosp
heric-tropospheric exchanges have been recorded in the four mountain peak s
tations involved in this project (Jungfraujoch, Sonnblick, Zugspitze and Mt
. Cimone) in 1996-1997. This paper presents and analyses data concerning th
e Mt. Cimone ground-based station, which is the highest peak of the Italian
Northern Apennines and the most representative WMO-GAW site in Italy. Epis
odes of vertical exchange in the lower stratosphere, as tropopause folding,
or in the upper troposphere, as down draft transport, have been registered
at Mt. Cimone since March 1996 and subsequently studied. In fact, the comp
arison between the behaviours of different background trace gases at a moun
tain baseline station, the weather situations and the backward trajectory a
nalyses can bring to light these events and be very useful for a better kno
wledge of transport phenomena. Correlation between high level of ozone conc
entration, chemical and meteorological parameters and three-dimensional bac
kward trajectories relative to two particular events are herein presented.
(C) 1999 Elsevier Science Ltd. All rights reserved.