Identification of Aerosol Sources in Siberia and Study of Aerosol Transport at Regional Scale by Airborne and Space-Borne Lidar Measurement

Antonin Zabukovec,Gérard Ancellet,Iogannes E Penner,Yuri S Balin,Grigorii Kokhanenko,J.D Paris,Jacques Pelon

doi:10.1051/epjconf/202023702014

Abstract

Airborne lidar measurements were carried out over Siberia in July 2013 and June 2017. Aerosol optical properties are derived using the Lagrangian FLEXible PARTicle dispersion model (FLEXPART) simulations and Moderate Resolution Imaging Spectrometer (MODIS) AOD. Comparison with Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) aerosol products is used to validate the CALIOP aerosol type identification above Siberia. Two case studies are discussed : a mixture of dust and pollution from Northern Kazakhstan and smoke plumes from forest fires. Comparisons with the CALIOP backscatter ratio show that CALIOP algorithm may overestimate the LR for a dusty mixture if not constrained by an independent AOD measurement.

Highlights

Asian pollution and oil/gas flaring in Siberia have been identified as aerosol key sources, the impact by these pollutants is poorly known
Regional aerosol studies with Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) have been conducted for high latitudes [1], European Arctic [2], or the Arctic ice sheet [3], but no similar studies exist for Central Siberia
Biomass-burning emissions were identified using the daily fire radiative power (FRP) maps based on NASA Fire Information for Resource Management System (FIRMS) using Moderate Resolution Imaging Spectrometer (MODIS) [5] and the Visible Infrared Imaging Radiometer Suite (VIIRS) [6]

Summary

Introduction

Asian pollution and oil/gas flaring in Siberia have been identified as aerosol key sources, the impact by these pollutants is poorly known. CALIOP or MODIS satellite observations provide valuable information about aerosol spatial distributions and optical properties may be compared with ground-based or airborne observations. Regional aerosol studies with CALIOP have been conducted for high latitudes [1], European Arctic [2], or the Arctic ice sheet [3], but no similar studies exist for Central Siberia. Aerosol types were characterized using the Lagrangian FLEXPART model, aircraft in-situ measurements, MODIS AOD and CALIOP aerosol vertical extent and depolarization in the source region. Biomass-burning emissions were identified using the daily fire radiative power (FRP) maps based on NASA Fire Information for Resource Management System (FIRMS) using MODIS [5] and the Visible Infrared Imaging Radiometer Suite (VIIRS) [6]. FRP > 0,05 GW were taken into account

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Conclusion