Potential of polarization/Raman lidar to separate fine dust, coarse dust, maritime, and anthropogenic aerosol profiles
We applied the recently introduced polarization lidar–photometer networking (POLIPHON) technique for the first time to triple-wavelength polarization lidar measurements at 355, 532, and 1064 nm. The lidar observations were performed at Barbados during the Saharan Aerosol Long-Range Transport and...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2017-09-01
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| Series: | Atmospheric Measurement Techniques |
| Online Access: | https://www.atmos-meas-tech.net/10/3403/2017/amt-10-3403-2017.pdf |
| _version_ | 1830357368251088896 |
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| author | R.-E. Mamouri R.-E. Mamouri A. Ansmann |
| author_facet | R.-E. Mamouri R.-E. Mamouri A. Ansmann |
| author_sort | R.-E. Mamouri |
| collection | DOAJ |
| description | We applied the recently introduced polarization lidar–photometer
networking (POLIPHON) technique for the first time to triple-wavelength
polarization lidar measurements at 355, 532, and 1064 nm. The lidar
observations were performed at Barbados during the Saharan Aerosol Long-Range
Transport and Aerosol-Cloud-Interaction Experiment (SALTRACE) in the summer
of 2014. The POLIPHON method comprises the traditional lidar technique to
separate mineral dust and non-dust backscatter contributions and the new,
extended approach to separate even the fine and coarse dust backscatter
fractions. We show that the traditional and the advanced method are
compatible and lead to a consistent set of dust and non-dust profiles at
simplified, less complex aerosol layering and mixing conditions as is the
case over the remote tropical Atlantic. To derive dust mass concentration
profiles from the lidar observations, trustworthy extinction-to-volume
conversion factors for fine, coarse, and total dust are needed and obtained
from an updated, extended Aerosol Robotic Network sun photometer data
analysis of the correlation between the fine, coarse and total dust volume
concentration and the respective fine, coarse, and total dust extinction
coefficient for all three laser wavelengths. Conversion factors (total volume
to extinction) for pure marine aerosol conditions and continental
anthropogenic aerosol situations are presented in addition. As a new feature
of the POLIPHON data analysis, the Raman lidar method for particle extinction
profiling is used to identify the aerosol type (marine or anthropogenic) of
the non-dust aerosol fraction. The full POLIPHON methodology was successfully
applied to a SALTRACE case and the results are discussed. We conclude that
the 532 nm polarization lidar technique has many advantages in comparison to
355 and 1064 nm polarization lidar approaches and leads to the most
robust and accurate POLIPHON products. |
| first_indexed | 2024-12-20T02:21:07Z |
| format | Article |
| id | doaj.art-97e58ff8f4814faf8fc27a7b5a9c68e4 |
| institution | Directory Open Access Journal |
| issn | 1867-1381 1867-8548 |
| language | English |
| last_indexed | 2024-12-20T02:21:07Z |
| publishDate | 2017-09-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Measurement Techniques |
| spelling | doaj.art-97e58ff8f4814faf8fc27a7b5a9c68e42022-12-21T19:56:48ZengCopernicus PublicationsAtmospheric Measurement Techniques1867-13811867-85482017-09-01103403342710.5194/amt-10-3403-2017Potential of polarization/Raman lidar to separate fine dust, coarse dust, maritime, and anthropogenic aerosol profilesR.-E. Mamouri0R.-E. Mamouri1A. Ansmann2Cyprus University of Technology, Dep. of Civil Engineering and Geomatics, Limassol, CyprusThe Cyprus Institute, Energy, Environment, and Water Research Center, Nicosia, CyprusLeibniz Institute for Tropospheric Research, Leipzig, GermanyWe applied the recently introduced polarization lidar–photometer networking (POLIPHON) technique for the first time to triple-wavelength polarization lidar measurements at 355, 532, and 1064 nm. The lidar observations were performed at Barbados during the Saharan Aerosol Long-Range Transport and Aerosol-Cloud-Interaction Experiment (SALTRACE) in the summer of 2014. The POLIPHON method comprises the traditional lidar technique to separate mineral dust and non-dust backscatter contributions and the new, extended approach to separate even the fine and coarse dust backscatter fractions. We show that the traditional and the advanced method are compatible and lead to a consistent set of dust and non-dust profiles at simplified, less complex aerosol layering and mixing conditions as is the case over the remote tropical Atlantic. To derive dust mass concentration profiles from the lidar observations, trustworthy extinction-to-volume conversion factors for fine, coarse, and total dust are needed and obtained from an updated, extended Aerosol Robotic Network sun photometer data analysis of the correlation between the fine, coarse and total dust volume concentration and the respective fine, coarse, and total dust extinction coefficient for all three laser wavelengths. Conversion factors (total volume to extinction) for pure marine aerosol conditions and continental anthropogenic aerosol situations are presented in addition. As a new feature of the POLIPHON data analysis, the Raman lidar method for particle extinction profiling is used to identify the aerosol type (marine or anthropogenic) of the non-dust aerosol fraction. The full POLIPHON methodology was successfully applied to a SALTRACE case and the results are discussed. We conclude that the 532 nm polarization lidar technique has many advantages in comparison to 355 and 1064 nm polarization lidar approaches and leads to the most robust and accurate POLIPHON products.https://www.atmos-meas-tech.net/10/3403/2017/amt-10-3403-2017.pdf |
| spellingShingle | R.-E. Mamouri R.-E. Mamouri A. Ansmann Potential of polarization/Raman lidar to separate fine dust, coarse dust, maritime, and anthropogenic aerosol profiles Atmospheric Measurement Techniques |
| title | Potential of polarization/Raman lidar to separate fine dust, coarse dust, maritime, and anthropogenic aerosol profiles |
| title_full | Potential of polarization/Raman lidar to separate fine dust, coarse dust, maritime, and anthropogenic aerosol profiles |
| title_fullStr | Potential of polarization/Raman lidar to separate fine dust, coarse dust, maritime, and anthropogenic aerosol profiles |
| title_full_unstemmed | Potential of polarization/Raman lidar to separate fine dust, coarse dust, maritime, and anthropogenic aerosol profiles |
| title_short | Potential of polarization/Raman lidar to separate fine dust, coarse dust, maritime, and anthropogenic aerosol profiles |
| title_sort | potential of polarization raman lidar to separate fine dust coarse dust maritime and anthropogenic aerosol profiles |
| url | https://www.atmos-meas-tech.net/10/3403/2017/amt-10-3403-2017.pdf |
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