This paper evaluates the effects of long-range
transport patterns of air trajectories arriving at a rural ground based station,
ICIPE Mbita 1125 meters above mean sea level. Mass concentration data of fine mode
AOD, coarse mode AOD and fine mode fraction AOD were combined with
back-trajectory cluster analysis. The Potential Source Contribution Function
(PSCF) model and
Concentration-Weighted
Trajectory (CWT) method were used to evaluate the transport pathways and
Potential Source Areas (PSA) affecting AOD loadings in western parts of Kenya
during wet (MAM) and dry (JJA) seasons. The main sources and paths of advection
to source and receptor regions and its relation to AOD concentration were
identified. Using these methods, the Geographic Information System (GIS) based
software and MeteoInfo was used for query and computation of potential source
contribution function and concentration weighted trajectory analyses when the
measurement data were
included. The results for both PSCF and CPF were sufficient indicators that
pollutants originated from two main sources, that is, northeastern and southeast directions from the
site.
Cite this paper
Zachary, M. , Yin, L. and Zacharia, M. (2018). Application of PSCF and CWT to Identify Potential Sources of Aerosol Optical Depth in ICIPE Mbita. Open Access Library Journal, 5, e4487. doi: http://dx.doi.org/10.4236/oalib.1104487.
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