Abstract
One year records of AErosolROboticNEtwork (AERONET) sun photometer measurements were analyzed to investigate the seasonal and daily variations of columnar aerosol optical depth. Some irregularities of this time series are associated with aerosol intrusions. The aerosol layers indicated by these irregularities are identified and characterized using the extensive optical data from coincident CALIPSO satellite observations and ground based LIDAR.
Highlights
Long term Aerosol Optical Depth studies show interesting influences of natural and anthropogenic aerosol sources
Eliminating the frequencies from the natural and anthropogenic influences we focused on one case (Figure 3)
CAD score for the Calipso profiles show values between -97 and -100 which indicates the presence of aerosols with high confidence. This region is due to long range transport aerosol layer and can be validated using the backwards trajectories from the HYSPLIT model which shows the source (Figure 6) for 2, 3 and 4 km altitudes sources
Summary
Long term Aerosol Optical Depth studies show interesting influences of natural and anthropogenic aerosol sources. Location of the site is in Magurele, a suburban area of Bucharest (26.029E; 44.048N, 93m above sea level). In such location, one can expect to find the urban influence as well as the natural influences of continental climate. We use time series analysis to determine the time periods specific to our location and identify some irregularities of the measured AOD values. These irregularities can be explained with the presence of clouds and/or long range transported aerosol layers
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