Bibcode
Weitnauer, C.; Beck, C.; Jacobeit, J.
Referencia bibliográfica
EGU General Assembly 2012, held 22-27 April, 2012 in Vienna, Austria., p.12971
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4
2012
Número de citas
0
Número de citas referidas
0
Descripción
Local concentrations of PM10 are affected on the one hand by the extent
of natural and anthropogenic emissions of these air pollutants and as
well by the level of precursor emissions. On the other hand local
meteorological conditions and large scale circulation dynamics are
important additional influencing factors. Whereas the general
relationship between local PM10 and large-scale circulation dynamics -
as for example reflected by weather- or circulation types - has been
proven in several studies so far only few systematic attempts have been
made to optimize weather- and circulation type classifications
concerning their relationship to local PM10 concentrations. The goal of
this contribution is to test varying circulation type classifications
with respect to their relevance for local PM10 concentrations in order
to detect those approaches that are best suited for the use in planned
subsequent studies (e.g. estimation of potential PM10 variations due to
future climate change). To this end different approaches for the
classification of weather- and circulation types are applied to gridded
daily NCEP/NCAR reanalysis data for the period 1979 - 2010 and resulting
circulation types are evaluated concerning their discriminatory power
for local PM10 concentrations in Augsburg, Germany. The set of
approaches that are evaluated and compared comprises varying
classification methods (e.g. cluster analysis, principal component
analysis), varying sets of classified variables (e.g. sea level
pressure, wind components) and combinations of variables, varying sizes
of the spatial domain and varying lengths of the classified period
(single days or sequences of days).