Model simulations and aircraft measurements of vertical, seasonal and latitudinal O3 and CO distributions over Europe H. Fischer1, M. Lawrence1, Ch. Gurk1, P. Hoor1, J. Lelieveld1, M. I. Hegglin2, D. Brunner2, and C. Schiller3 1Max Planck Institute for Chemistry, Airchemistry Division, P.O. Box 3060, 55020 Mainz, Germany 2Institute for Atmospheric and Climate Science, Swiss Federal Institute of Technology, Zürich, Switzerland 3FZ Jülich, ICG-1, Jülich, Germany
Abstract. During a series of 8 measurement campaigns within the SPURT project
(2001-2003), vertical profiles of CO and O3 have been obtained at
subtropical, middle and high latitudes over western Europe, covering the
troposphere and lowermost stratosphere up to ~14 km altitude during
all seasons. The seasonal and latitudinal variation of the measured trace
gas profiles are compared to simulations with the chemical transport model
MATCH. In the troposphere reasonable agreement between observations and
model predictions is achieved for CO and O3, in particular at
subtropical and mid-latitudes, while the model overestimates
(underestimates) CO (O3 in the lowermost stratosphere particularly at
high latitudes, indicating too strong simulated bi-directional exchange
across the tropopause. By the use of tagged tracers in the model, long-range
transport of Asian air masses is identified as the dominant source of CO
pollution over Europe in the free troposphere.
Citation: Fischer, H., Lawrence, M., Gurk, Ch., Hoor, P., Lelieveld, J., Hegglin, M. I., Brunner, D., and Schiller, C.: Model simulations and aircraft measurements of vertical, seasonal and latitudinal O3 and CO distributions over Europe, Atmos. Chem. Phys., 6, 339-348, doi:10.5194/acp-6-339-2006, 2006.