Articles | Volume 17, issue 3
Research article
 | Highlight paper
05 Feb 2024
Research article | Highlight paper |  | 05 Feb 2024

Long-term aerosol particle depolarization ratio measurements with HALO Photonics Doppler lidar

Viet Le, Hannah Lobo, Ewan J. O'Connor, and Ville Vakkari


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Latest update: 27 May 2024
Executive editor
This is the first time showing that long-term polarization observations with a Doppler lidar are possible. Second, the methodology could be applied to other HALO lidars and thus expand the capabilities for observing atmospheric aerosol. Third: It shows that Finland (any maybe whole Scandinavia) is during summer time most of the time dominated by Pollen or other biogenic aerosol, something which is maybe attributed to the continental background class used in CALIPSO, and not yet fully understood.
Short summary
This study offers a long-term overview of aerosol particle depolarization ratio at the wavelength of 1565 nm obtained from vertical profiling measurements by Halo Doppler lidars during 4 years at four different locations across Finland. Our observations support the long-term usage of Halo Doppler lidar depolarization ratio such as the detection of aerosols that may pose a safety risk for aviation. Long-range Saharan dust transport and pollen transport are also showcased here.