Evidence for Long-Range Transport of North American Anthropogenic and Wildfire Emissions to Europe from Airborne and Ground Based Lidar Measurements during European ITOP (IGAC Lagrangian 2K4, ICARTT)

HR: 08:00h
AN: A41D-01 INVITED [Abstracts]
TI: Evidence for Long-Range Transport of North American Anthropogenic and Wildfire Emissions to Europe from Airborne and Ground Based Lidar Measurements during European ITOP (IGAC Lagrangian 2K4, ICARTT)
AU: * Law, K
EM: kathy.law@aero.jussieu.fr
AF: Service d'Aeronomie/CNRS, Universite Pierre et Marie Curie, Paris, 75252 France
AU: Schlager, H
A41D-01 AF: Inst. Atmospheric Physics, DLR Oberpfaffenhofen, Wessling, D-82230 Germany
AU: Real, E
A41D-01 AF: Service d'Aeronomie/CNRS, Universite Pierre et Marie Curie, Paris, 75252 France
AU: Ancellet, G
A41D-01 AF: Service d'Aeronomie/CNRS, Universite Pierre et Marie Curie, Paris, 75252 France
AU: Huntreiser, H
A41D-01 AF: Inst. Atmospheric Physics, DLR Oberpfaffenhofen, Wessling, D-82230 Germany
AU: Petzold, A
A41D-01 AF: Inst. Atmospheric Physics, DLR Oberpfaffenhofen, Wessling, D-82230 Germany
AU: Haeffelin, M
A41D-01 AF: SIRTA, LMD/IPSL, Palaiseau, 91128 France
AU: Pietras, C
A41D-01 AF: SIRTA, LMD/IPSL, Palaiseau, 91128 France
AU: Nedelec, P
A41D-01 AF: Laboratoire d'Aerologie/CNRS, 14, ave Edouard Belin, Toulouse, 31400 France
AU: Stohl, A
A41D-01 AF: NILU, Instituttveien 18, Kjeller, N-2027 Norway
AU: Methven, J
A41D-01 AF: Dept. Meteorology, University of Reading, Reading, RG6 6BB United Kingdom
AU: Arnold, S
A41D-01 AF: School of Earth and Environment, University of Leeds, Leeds, LS2 9JT United Kingdom
AU: Parrish, D
A41D-01 AF: NOAA Aeronomy Lab, 325 Broadway, Boulder, CO 80305 United States
AU: Ryerson, T
A41D-01 AF: NOAA Aeronomy Lab, 325 Broadway, Boulder, CO 80305 United States
AU: Lewis, A
A41D-01 AF: Department of Chemistry, University of York, York, YO10 5DD United Kingdom
AU: Avery, M
A41D-01 AF: Max-Planck Inst.-K, Universtitat Heidelberg, Heidelberg, 69117 Germany
AU: Sachse, G
A41D-01 AF: NASA Langley Research Center, MS 483, Hampton, VA 23681 United States
AU: Arnold, F
A41D-01 AF: Max-Planck Inst.-K, Universtitat Heidelberg, Heidelberg, 69117 Germany
AU: Spidel, M
A41D-01 AF: Max-Planck Inst.-K, Universtitat Heidelberg, Heidelberg, 69117 Germany
AU: Fischer, H
A41D-01 AF: Max-Planck Inst.-Chemie, Becherweg 27, Mainz, 55128 Germany
AU: Gurck, C
A41D-01 AF: Max-Planck Inst.-Chemie, Becherweg 27, Mainz, 55128 Germany
AU: Mihalopoulos, N
A41D-01 AF: Department of Chemistry, University of Crete, Heraklion, 71409 Greece
AB: Observations collected as part of the IGAC Lagrangian 2k4, European Intercontinental Transport of Ozone and Precursors (ITOP) campaign in summer 2004 have been analysed. Examples will be presented of transport of North American (NA) urban and boreal forest fire pollution to Europe as observed with DLR Falcon, MOZAIC aircraft and ground-based lidar measurements. In general CO, NOy, and aerosols were strongly enhanced in the lower and middle troposphere over Europe during this period. Overall more than 30 distinct plumes of NA pollution were observed. Some NA pollution plumes were encountered in the European boundary layer. Ozone mixing ratios were enhanced in most NA pollution layers relative to background by about 10 to 20 ppbv, particularly in forest fire plumes. Results from the Lagrangian dispersion model FLEXPART and trajectory analysis have been used to identify cases where the same air masses were sampled on more than one occasion by one or more aircraft during transport across the North Atlantic. Measured parameters were also used to investigate whether indeed the same pollutant plumes were sampled. Several interesting cases have been analysed using a Lagrangian photochemical model, CiTTyCAT including long-range transport of plumes originating from northeast North America and also from forest fires, with highly elevated CO levels for example, in Alaska and Canada. The model was initialised with chemical data from the first sampled air mass, run along appropriate trajectories and compared to chemical data collected downwind. Analysis of different cases shows that as well as photochemical processes it is also important to consider physical removal processes such as wet and dry deposition, the influence of aerosols as well as mixing between different air masses. In particular, several very clear cases of long-range transport of forest fire plumes across of the Atlantic were seen over Europe between 21 and 24 July by the DLR Falcon, MOZAIC aircraft and the SIRTA aerosol lidar near Paris. Photochemical production of ozone appears to be significantly enhanced in these layers. The possibility of ozone import into the European boundary layer over the Mediterranean region has also been investigated.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0365 Troposphere: composition and chemistry
DE: 0368 Troposphere: constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005