A Method for Retrieving Stratospheric Aerosol Extinction and Particle Size from Ground-Based Rayleigh-Mie-Raman Lidar Observations
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 ba...
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ftmdpi:oai:mdpi.com:/2073-4433/11/8/773/ 2023-08-20T04:04:55+02:00 A Method for Retrieving Stratospheric Aerosol Extinction and Particle Size from Ground-Based Rayleigh-Mie-Raman Lidar Observations Jacob Zalach Christian von Savigny Arvid Langenbach Gerd Baumgarten Franz-Josef Lübken Adam Bourassa agris 2020-07-22 application/pdf https://doi.org/10.3390/atmos11080773 EN eng Multidisciplinary Digital Publishing Institute Aerosols https://dx.doi.org/10.3390/atmos11080773 https://creativecommons.org/licenses/by/4.0/ Atmosphere; Volume 11; Issue 8; Pages: 773 stratospheric aerosols high latitude stratosphere multi-wavelength lidar measurements Text 2020 ftmdpi https://doi.org/10.3390/atmos11080773 2023-07-31T23:48:42Z 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. Text Arctic Northern Norway MDPI Open Access Publishing Alomar ENVELOPE(-67.083,-67.083,-68.133,-68.133) Arctic Norway Atmosphere 11 8 773 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
stratospheric aerosols high latitude stratosphere multi-wavelength lidar measurements |
spellingShingle |
stratospheric aerosols high latitude stratosphere multi-wavelength lidar measurements Jacob Zalach Christian von Savigny Arvid Langenbach Gerd Baumgarten Franz-Josef Lübken Adam Bourassa A Method for Retrieving Stratospheric Aerosol Extinction and Particle Size from Ground-Based Rayleigh-Mie-Raman Lidar Observations |
topic_facet |
stratospheric aerosols high latitude stratosphere multi-wavelength lidar measurements |
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 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. |
format |
Text |
author |
Jacob Zalach Christian von Savigny Arvid Langenbach Gerd Baumgarten Franz-Josef Lübken Adam Bourassa |
author_facet |
Jacob Zalach Christian von Savigny Arvid Langenbach Gerd Baumgarten Franz-Josef Lübken Adam Bourassa |
author_sort |
Jacob Zalach |
title |
A Method for Retrieving Stratospheric Aerosol Extinction and Particle Size from Ground-Based Rayleigh-Mie-Raman Lidar Observations |
title_short |
A Method for Retrieving Stratospheric Aerosol Extinction and Particle Size from Ground-Based Rayleigh-Mie-Raman Lidar Observations |
title_full |
A Method for Retrieving Stratospheric Aerosol Extinction and Particle Size from Ground-Based Rayleigh-Mie-Raman Lidar Observations |
title_fullStr |
A Method for Retrieving Stratospheric Aerosol Extinction and Particle Size from Ground-Based Rayleigh-Mie-Raman Lidar Observations |
title_full_unstemmed |
A Method for Retrieving Stratospheric Aerosol Extinction and Particle Size from Ground-Based Rayleigh-Mie-Raman Lidar Observations |
title_sort |
method for retrieving stratospheric aerosol extinction and particle size from ground-based rayleigh-mie-raman lidar observations |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2020 |
url |
https://doi.org/10.3390/atmos11080773 |
op_coverage |
agris |
long_lat |
ENVELOPE(-67.083,-67.083,-68.133,-68.133) |
geographic |
Alomar Arctic Norway |
geographic_facet |
Alomar Arctic Norway |
genre |
Arctic Northern Norway |
genre_facet |
Arctic Northern Norway |
op_source |
Atmosphere; Volume 11; Issue 8; Pages: 773 |
op_relation |
Aerosols https://dx.doi.org/10.3390/atmos11080773 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/atmos11080773 |
container_title |
Atmosphere |
container_volume |
11 |
container_issue |
8 |
container_start_page |
773 |
_version_ |
1774715328302940160 |