Journal article

Trajectory analysis of atmospheric transport of fine particles, SO 2, NOx and O3 to the SMEAR II station in Finland in 1996-2008

Riuttanen L, Hulkkonen M, Dal Maso M, Junninen H, Kulmala M ...see all

Atmospheric Chemistry and Physics, vol. 13, issue 4 (2013) pp. 2153-2164

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Trajectory statistical methods that combine in situ measurements of
trace gas or particle concentrations and back trajectories calculated
for corresponding times have proven to be a valuable approach in
atmospheric research; especially in investigating air pollution
episodes, but also in e. g. tracing the air mass history related to high
vs. low concentrations of aerosol particles of different sizes at the
receptor site. A concentration field method was fine-tuned to take the
presumable horizontal error in calculated trajectories into account,
tested with SO2 and validated by comparison against EMEP (European
Monitoring and Evaluation Programme) emission data. In this work we
apply the improved method for characterizing the transport of
atmospheric SO2, NOx, O-3 and aerosol particles of different size modes
to a Finnish measurement station located in Hyytiala (61 degrees 51' N,
24 degrees 17' E). Our method did not reproduce the EMEP emission
soures, but proved useful for qualitative analysis on where the measured
compounds come from, from one measurement station point of view. We
applied it to study trends and seasonal variation in atmospheric
pollutant transport during 13 yr at the SMEAR II (Station for Measuring
Ecosystem-Atmosphere Interactions) station.

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