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A Method for Retrieving Stratospheric Aerosol Extinction and Particle Size from Ground-Based Rayleigh-Mie-Raman Lidar Observations
| Content Provider | MDPI |
|---|---|
| Author | Franz-Josef, Lübken Zalach, Jacob Savigny, Christian Von Langenbach, Arvid Baumgarten, Gerd Bourassa, Adam |
| Copyright Year | 2020 |
| Description | 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 that 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 |
| Starting Page | 773 |
| e-ISSN | 20734433 |
| DOI | 10.3390/atmos11080773 |
| Journal | Atmosphere |
| Issue Number | 8 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2020-07-22 |
| Access Restriction | Open |
| Subject Keyword | Atmosphere Atmospheric Sciences Stratospheric Aerosols High Latitude Stratosphere Multi-wavelength Lidar Measurements |
| Content Type | Text |
| Resource Type | Article |
