Assessment of atmospheric processes driving ozone variations in the subtropical North Atlantic free troposphere

An analysis of the 22-yr ozone (O3) series (1988– 2009) at the subtropical high mountain Izaña station (IZO; 2373m a.s.l.), representative of free troposphere (FT) conditions, is presented. Diurnal and seasonal O3 variations as well as the O3 trend (0.19±0.05%yr−1 or 0.09 ppbvyr−1), are assessed. A...

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Bibliographic Details
Published in:Atmospheric Chemistry and Physics
Main Authors: Cuevas Agulló, Emilio, González Ramos, Yenny, Rodríguez González, Sergio, Guerra García, Juan Carlos, Gómez Peláez, Ángel Jesús, Alonso Pérez, Silvia, Bustos Seguela, Juan José de, Milford, Celia
Format: Article in Journal/Newspaper
Language:English
Published: European Geosciences Union 2013
Subjects:
Variaciones de ozono
Alta troposfera
Ozone variations
Free troposphere
North Atlantic
Online Access:https://hdl.handle.net/20.500.11765/496
Description
Summary:An analysis of the 22-yr ozone (O3) series (1988– 2009) at the subtropical high mountain Izaña station (IZO; 2373m a.s.l.), representative of free troposphere (FT) conditions, is presented. Diurnal and seasonal O3 variations as well as the O3 trend (0.19±0.05%yr−1 or 0.09 ppbvyr−1), are assessed. A climatology of O3 transport pathways using backward trajectories shows that higher O3 values are associated with air masses travelling above 4 km altitude from North America and North Atlantic Ocean, while low O3 is transported from the Saharan continental boundary layer (CBL).

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