Chemical characteristics assigned to trajectory clusters during the MINOS campaign M. Traub1, H. Fischer1, M. de Reus1, R. Kormann1, H. Heland2, H. Ziereis2, H. Schlager2, R. Holzinger1, J. Williams1, C. Warneke3, J. de Gouw3, and J. Lelieveld1 1Max Planck Institute for Chemistry, Mainz, Germany 2Institute for Atmospheric Physics, German Aerospace Center, DLR, Oberpfaffenhofen, Germany 3NOAA Aeronomy Laboratory, Boulder, Colorado, USA
Abstract. During the Mediterranean Intensive Oxidant Study (MINOS) in August 2001 a
total of 14 measurement flights were performed with the DLR Falcon jet aircraft
from Heraklion, Crete. One objective of this campaign was to investigate the
role of long-range transport of pollutants into the Mediterranean area. An
analysis of 5-day back trajectories indicates that in the lower troposphere
(0-4 km) air masses originated from eastern and western Europe, in the mid-troposphere
(4-8 km) from the North Atlantic Ocean region and in the upper troposphere
(8-14 km) from North Atlantic Ocean/North America (NANA) as well as South Asia. We allocated
all back trajectories to clusters based on their ending height and source region. The mixing ratios of ozone, nitrogen oxide, total reactive oxidized
nitrogen (NOy), formaldehyde, methanol, acetonitrile, acetone, peroxyacetyl
nitrate (PAN), carbon dioxide, carbon monoxide and methane measured along the
flight tracks are examined in relation to the different cluster trajectories.
In the lower troposphere the mean trace gas mixing ratios of the eastern Europe
cluster trajectories were significantly higher than those from western Europe.
In the upper troposphere air from the NANA region seems to be influenced by the
stratosphere, in addition, air masses were transported from South Asia, being influenced by strong convection in the Indian
Citation: Traub, M., Fischer, H., de Reus, M., Kormann, R., Heland, H., Ziereis, H., Schlager, H., Holzinger, R., Williams, J., Warneke, C., de Gouw, J., and Lelieveld, J.: Chemical characteristics assigned to trajectory clusters during the MINOS campaign, Atmos. Chem. Phys., 3, 459-468, doi:10.5194/acp-3-459-2003, 2003.