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...
Published in: | Atmosphere |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
MDPI AG
2020
|
Subjects: | |
Online Access: | https://doi.org/10.3390/atmos11080773 https://doaj.org/article/6c2908229315424dbfcb07be11530848 |
id |
ftdoajarticles:oai:doaj.org/article:6c2908229315424dbfcb07be11530848 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:6c2908229315424dbfcb07be11530848 2023-05-15T15:16:49+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 2020-07-01T00:00:00Z https://doi.org/10.3390/atmos11080773 https://doaj.org/article/6c2908229315424dbfcb07be11530848 EN eng MDPI AG https://www.mdpi.com/2073-4433/11/8/773 https://doaj.org/toc/2073-4433 doi:10.3390/atmos11080773 2073-4433 https://doaj.org/article/6c2908229315424dbfcb07be11530848 Atmosphere, Vol 11, Iss 773, p 773 (2020) stratospheric aerosols high latitude stratosphere multi-wavelength lidar measurements Meteorology. Climatology QC851-999 article 2020 ftdoajarticles https://doi.org/10.3390/atmos11080773 2022-12-31T02:32:32Z 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 <math display="inline"> <semantics> <msup> <mrow></mrow> <mo>∘</mo> </msup> </semantics> </math> N to 80 <math display="inline"> <semantics> <msup> <mrow></mrow> <mo>∘</mo> </msup> </semantics> </math> 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. Article in Journal/Newspaper Arctic Northern Norway Directory of Open Access Journals: DOAJ Articles Arctic Norway Alomar ENVELOPE(-67.083,-67.083,-68.133,-68.133) Atmosphere 11 8 773 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
stratospheric aerosols high latitude stratosphere multi-wavelength lidar measurements Meteorology. Climatology QC851-999 |
spellingShingle |
stratospheric aerosols high latitude stratosphere multi-wavelength lidar measurements Meteorology. Climatology QC851-999 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 Meteorology. Climatology QC851-999 |
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 <math display="inline"> <semantics> <msup> <mrow></mrow> <mo>∘</mo> </msup> </semantics> </math> N to 80 <math display="inline"> <semantics> <msup> <mrow></mrow> <mo>∘</mo> </msup> </semantics> </math> 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 |
Article in Journal/Newspaper |
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 |
MDPI AG |
publishDate |
2020 |
url |
https://doi.org/10.3390/atmos11080773 https://doaj.org/article/6c2908229315424dbfcb07be11530848 |
long_lat |
ENVELOPE(-67.083,-67.083,-68.133,-68.133) |
geographic |
Arctic Norway Alomar |
geographic_facet |
Arctic Norway Alomar |
genre |
Arctic Northern Norway |
genre_facet |
Arctic Northern Norway |
op_source |
Atmosphere, Vol 11, Iss 773, p 773 (2020) |
op_relation |
https://www.mdpi.com/2073-4433/11/8/773 https://doaj.org/toc/2073-4433 doi:10.3390/atmos11080773 2073-4433 https://doaj.org/article/6c2908229315424dbfcb07be11530848 |
op_doi |
https://doi.org/10.3390/atmos11080773 |
container_title |
Atmosphere |
container_volume |
11 |
container_issue |
8 |
container_start_page |
773 |
_version_ |
1766347103026544640 |