Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.11765/2223
On the origin of elevated surface ozone concentrations at Izana Observatory, Tenerife during late March 1996
Title: On the origin of elevated surface ozone concentrations at Izana Observatory, Tenerife during late March 1996
Authors: Kentarchos, A. S.Roelofs, G. J.Lelieveld, J.Cuevas Agulló, Emilio ORCID RESEARCHERID SCOPUSID
Keywords: Surface ozone; Concentrations; Variability; Stratosphere-troposphere exchange
Issue Date: 2000
Publisher: American Geophysical Union
Citation: Geophysical Research Letters. 2000, 27(22), p. 3699–3702
Publisher version: https://dx.doi.org/10.1029/2000GL011518
Abstract: The origin of relatively high surface ozone concentrations measured at Izana Observatory (Canary Islands) during the end of March 1996 is studied using a coupled chemistry-GCM (ECHAM4) at T63 resolution (1.875° × 1.875°). Meteorological fields (geopotential height, potential vorticity, specific humidity), and a model-simulated stratospheric ozone tracer as well as 3-D back trajectories, show the stratospheric origin of these relatively high surface ozone values caused by cross-tropopause exchange at the western flank of an upper level trough/cut-off low (COL) over the extratropical North-Atlantic Ocean. The good agreement between observations and model results (within 10–15%) indicates that the high resolution chemistry-GCM is a useful tool towards the understanding of natural sources controlling background surface ozone variability. The results underscore the importance of stratosphere-troposphere exchange (STE) during late winter/early spring for lower free tropospheric ozone at subtropical latitudes.
URI: http://hdl.handle.net/20.500.11765/2223
ISSN: 0094-8276
1944-8007
Appears in Collections:Artículos científicos 2000-2004


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