Remote monitoring of aerosol layers over Sofia during Sahara dust transport episode (April, 2012)

Dimitar Stoyanov; Ivan Grigorov; Atanaska Deleva; Nikolay Kolev; Zahari Peshev; Georgi Kolarov; Evgeni Donev; Danko Ivanov

doi:10.1117/12.2014154

15 March 2013 Remote monitoring of aerosol layers over Sofia during Sahara dust transport episode (April, 2012)

Dimitar Stoyanov, Ivan Grigorov, Atanaska Deleva, Nikolay Kolev, Zahari Peshev, Georgi Kolarov, Evgeni Donev, Danko Ivanov

Author Affiliations +

Proceedings Volume 8770, 17th International School on Quantum Electronics: Laser Physics and Applications; 87700Y (2013) https://doi.org/10.1117/12.2014154
Event: Seventeenth International School on Quantum Electronics: Laser Physics and Applications, 2012, Nessebar, Bulgaria

Abstract

In this work we present results of lidar remote sensing of aerosol layers in the atmosphere above Sofia during an episode of Sahara dust transport, 02-07 April, 2012. The investigations were made using two lidar systems, one equipped with a CuBr-vapor laser, emitting at wavelength 510.6 nm, and a second one - with Nd:YAG laser, at wavelengths 1064 nm and 532 nm. The results of lidar measurements are presented in terms of vertical atmospheric backscatter coefficient profiles and color maps of the aerosol stratification evolution. The involved into discussions ceilometer data (CHM 15k ceilometer) and satellite data from CALIPSO lidar, enhance the synergy of observations. Conclusion about atmospheric aerosol’s origin was made upon analyses of the information of weather-forecast maps provided by the Forecast system of Barcelona Supercomputing Centre, which are accessible via Internet. Additional information was provided by calculations of the backward air mass trajectories, using online software of NOAA about HYSPLIT model. The comparison between the data from the two lidars and the ceilometer showed similar behavior of aerosol layers development in the atmosphere above Sofia. All information about aerosol layers origin, their altitude above ground, persistence during lidar observations, confirmed the conclusion of observation of a long-distance Sahara dust transport beyond Balkans and Sofia. An interesting completion of CALIPSO lidar and ground based lidars results of measurement is presented in case of thick opaque cloud layer in the atmosphere, which slices the path of lidar sensing in both directions.

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Dimitar Stoyanov, Ivan Grigorov, Atanaska Deleva, Nikolay Kolev, Zahari Peshev, Georgi Kolarov, Evgeni Donev, and Danko Ivanov "Remote monitoring of aerosol layers over Sofia during Sahara dust transport episode (April, 2012)", Proc. SPIE 8770, 17th International School on Quantum Electronics: Laser Physics and Applications, 87700Y (15 March 2013); https://doi.org/10.1117/12.2014154

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