Abstract

An intense mineral dust event from the Saharan desert was observed over the Island of Barbados after a long-range transport over the Atlantic Ocean during SALTRACE Campaign in June 2014. We analyze data from a multi-wavelength Raman-lidar system of Leibniz Institute for Tropospheric Research (TROPOS) called BERTHA (Back- scatter Extinction lidar Ratio Temperature Humidity profiling Apparatus) to derive the aerosol microphysical properties of the inspected layer via regularization using the software SphInX (Spheroidal Inversion eXperiments). These parameters were found to be within credible ranges.

Highlights

  • The data was obtained from the multi-wavelength Raman-lidar system of Tropospheric Research (TROPOS) located at the ground-based remote sensing station in Husbands, north of the capital Bridgetown at the west coast of Barbados (13.15°N, 59.62°W, and 110 m above sea level) on 20 June 2014

  • Identifying L(λλ) as our measurement data and vv(rr, aa) as the unknown volume distribution, the problem reduces to the inversion of Eq (1)

  • Solving Eq (1) requires discretization, regularization and a parameter choice rule handled by the software SphInX, see e.g. [5, 6, 7]

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Summary

INTRODUCTION

The data was obtained from the multi-wavelength Raman-lidar system of TROPOS located at the ground-based remote sensing station in Husbands, north of the capital Bridgetown at the west coast of Barbados (13.15°N, 59.62°W, and 110 m above sea level) on 20 June 2014. The BERTHA system is a container-based, multi-wavelength polarization Raman lidar. It is able to take measurements of the depolarization ratio at three wavelengths (355, 532 and 1064 nm) simultaneously, which is crucial to characterize the dust after long-range transport, see [1, 2, 3] for more details. It operates as a 3+2+3 lidar system

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