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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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Volume 9, issue 9 | Copyright
Atmos. Meas. Tech., 9, 4269-4278, 2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 01 Sep 2016

Research article | 01 Sep 2016

1064 nm rotational Raman lidar for particle extinction and lidar-ratio profiling: cirrus case study

Moritz Haarig1, Ronny Engelmann1, Albert Ansmann1, Igor Veselovskii2, David N. Whiteman3, and Dietrich Althausen1 Moritz Haarig et al.
  • 1Leibniz Institute for Tropospheric Research, Leipzig, Germany
  • 2Physics Instrumentation Center, Moscow, Russia
  • 3NASA, GSFC, Greenbelt, Maryland, USA

Abstract. For the first time, vertical profiles of the 1064nm particle extinction coefficient obtained from Raman lidar observations at 1058nm (nitrogen and oxygen rotational Raman backscatter) are presented. We applied the new technique in the framework of test measurements and performed several cirrus observations of particle backscatter and extinction coefficients, and corresponding extinction-to-backscatter ratios at the wavelengths of 355, 532, and 1064nm. The cirrus backscatter coefficients were found to be equal for all three wavelengths keeping the retrieval uncertainties in mind. The multiple-scattering-corrected cirrus extinction coefficients at 355nm were on average about 20–30% lower than the ones for 532 and 1064nm. The cirrus-mean extinction-to-backscatter ratio (lidar ratio) was 31±5sr (355nm), 36±5sr (532nm), and 38±5sr (1064nm) in this single study. We further discussed the requirements needed to obtain aerosol extinction profiles in the lower troposphere at 1064nm with good accuracy (20% relative uncertainty) and appropriate temporal and vertical resolution.

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