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Article

A Method for Retrieving Stratospheric Aerosol Extinction and Particle Size from Ground-Based Rayleigh-Mie-Raman Lidar Observations

1
Institute of Physics, University of Greifswald, Felix-Hausdorff-Str. 6, 17489 Greifswald, Germany
2
Leibniz-Institute of Atmospheric Physics, Schlossstr. 6, 18225 Kühlungsborn, Germany
3
Department of Physics & Engineering Physics, University of Saskatchewan, 116 Science Place, Saskatoon, SK S7N 5E2, Canada
*
Author to whom correspondence should be addressed.
Atmosphere 2020, 11(8), 773; https://doi.org/10.3390/atmos11080773
Received: 27 May 2020 / Revised: 16 July 2020 / Accepted: 17 July 2020 / Published: 22 July 2020
(This article belongs to the Section Aerosols)
We report on the retrieval of stratospheric aerosol particle size and extinction coefficient profiles from multi-color backscatter measurements with the Rayleigh–Mie–Raman lidar operated at the Arctic Lidar Observatory for Middle Atmosphere Research (ALOMAR) in northern Norway. The retrievals are based on a two-step approach. In a first step, the median radius of an assumed monomodal log-normal particle size distribution with fixed width is retrieved based on a color index formed from the measured backscatter ratios at the wavelengths of 1064 nm and 532 nm. An intrinsic ambiguity of the retrieved aerosol size information is discussed. In a second step, this particle size information is used to convert the measured lidar backscatter ratio to aerosol extinction coefficients. The retrieval is currently based on monthly-averaged lidar measurements and the results for March 2013 are discussed. A sensitivity study is presented that allows for establishing an error budget for the aerosol retrievals. Assuming a monomodal log-normal aerosol particle size distribution with a geometric width of S = 1.5, median radii on the order of below 100 nm are retrieved. The median radii are found to generally decrease with increasing altitude. The retrieved aerosol extinction profiles are compared to observations with the OSIRIS (Optical Spectrograph and InfraRed Imager System) and the OMPS-LP (Ozone Mapping Profiling Suite Limb Profiler) satellite instruments in the 60 N to 80 N latitude band. The extinction profiles that were retrieved from the lidar measurements show good agreement with the observations of the two satellite instruments when taking the different wavelengths of the instruments into account. View Full-Text
Keywords: stratospheric aerosols; high latitude stratosphere; multi-wavelength lidar measurements stratospheric aerosols; high latitude stratosphere; multi-wavelength lidar measurements
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MDPI and ACS Style

Zalach, J.; von Savigny, C.; Langenbach, A.; Baumgarten, G.; Lübken, F.-J.; Bourassa, A. A Method for Retrieving Stratospheric Aerosol Extinction and Particle Size from Ground-Based Rayleigh-Mie-Raman Lidar Observations. Atmosphere 2020, 11, 773. https://doi.org/10.3390/atmos11080773

AMA Style

Zalach J, von Savigny C, Langenbach A, Baumgarten G, Lübken F-J, Bourassa A. A Method for Retrieving Stratospheric Aerosol Extinction and Particle Size from Ground-Based Rayleigh-Mie-Raman Lidar Observations. Atmosphere. 2020; 11(8):773. https://doi.org/10.3390/atmos11080773

Chicago/Turabian Style

Zalach, Jacob; von Savigny, Christian; Langenbach, Arvid; Baumgarten, Gerd; Lübken, Franz-Josef; Bourassa, Adam. 2020. "A Method for Retrieving Stratospheric Aerosol Extinction and Particle Size from Ground-Based Rayleigh-Mie-Raman Lidar Observations" Atmosphere 11, no. 8: 773. https://doi.org/10.3390/atmos11080773

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