Laboratory Evaluation of the (355, 532) nm Particle Depolarization Ratio of Pure Pollen at 180.0° Lidar Backscattering Angle
While pollen is expected to impact public human health and the Earth’s climate more and more in the coming decades, lidar remote sensing of pollen has become an important developing research field. To differentiate among the pollen taxa, a polarization lidar is an interesting tool since pollen exhib...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-08-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/14/15/3767 |
| _version_ | 1827624683890016256 |
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| author | Danaël Cholleton Patrick Rairoux Alain Miffre |
| author_facet | Danaël Cholleton Patrick Rairoux Alain Miffre |
| author_sort | Danaël Cholleton |
| collection | DOAJ |
| description | While pollen is expected to impact public human health and the Earth’s climate more and more in the coming decades, lidar remote sensing of pollen has become an important developing research field. To differentiate among the pollen taxa, a polarization lidar is an interesting tool since pollen exhibit non-spherical complex shapes. A key attribute is thus the lidar particle depolarization ratio (<i>PDR</i>) of pollen, which is however difficult to quantify as pollen are large and complex-shaped particles, far beyond the reach of light scattering numerical simulations. In this paper, a laboratory π-polarimeter is used to accurately evaluate the <i>PDR</i> of pure pollen, for the first time at the lidar exact backscattering angle of 180.0°. We hence reveal the lidar <i>PDR</i> of pure ragweed, ash, birch, pine, cypress and spruce pollens at 355 and 532 nm lidar wavelengths, as presented at the ELC 2021 conference. A striking result is the spectral dependence of the lidar <i>PDR</i>, highlighting the importance of dual-wavelength (or more) polarization lidars to identify pollen taxa. These spectral and polarimetric fingerprints of pure pollen, as they are accurate, can be used by the lidar community to invert multi-wavelength lidar polarization measurements involving pollen. |
| first_indexed | 2024-03-09T12:13:10Z |
| format | Article |
| id | doaj.art-b20dcbad227c487cbe3fc032f48330f7 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-09T12:13:10Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-b20dcbad227c487cbe3fc032f48330f72023-11-30T22:49:39ZengMDPI AGRemote Sensing2072-42922022-08-011415376710.3390/rs14153767Laboratory Evaluation of the (355, 532) nm Particle Depolarization Ratio of Pure Pollen at 180.0° Lidar Backscattering AngleDanaël Cholleton0Patrick Rairoux1Alain Miffre2Institut Lumière Matière, Université Claude Bernard Lyon 1, University of Lyon, CNRS, 69622 Villeurbanne, FranceInstitut Lumière Matière, Université Claude Bernard Lyon 1, University of Lyon, CNRS, 69622 Villeurbanne, FranceInstitut Lumière Matière, Université Claude Bernard Lyon 1, University of Lyon, CNRS, 69622 Villeurbanne, FranceWhile pollen is expected to impact public human health and the Earth’s climate more and more in the coming decades, lidar remote sensing of pollen has become an important developing research field. To differentiate among the pollen taxa, a polarization lidar is an interesting tool since pollen exhibit non-spherical complex shapes. A key attribute is thus the lidar particle depolarization ratio (<i>PDR</i>) of pollen, which is however difficult to quantify as pollen are large and complex-shaped particles, far beyond the reach of light scattering numerical simulations. In this paper, a laboratory π-polarimeter is used to accurately evaluate the <i>PDR</i> of pure pollen, for the first time at the lidar exact backscattering angle of 180.0°. We hence reveal the lidar <i>PDR</i> of pure ragweed, ash, birch, pine, cypress and spruce pollens at 355 and 532 nm lidar wavelengths, as presented at the ELC 2021 conference. A striking result is the spectral dependence of the lidar <i>PDR</i>, highlighting the importance of dual-wavelength (or more) polarization lidars to identify pollen taxa. These spectral and polarimetric fingerprints of pure pollen, as they are accurate, can be used by the lidar community to invert multi-wavelength lidar polarization measurements involving pollen.https://www.mdpi.com/2072-4292/14/15/3767lidar particle depolarization ratiopure pollenpolarization lidarlaboratory |
| spellingShingle | Danaël Cholleton Patrick Rairoux Alain Miffre Laboratory Evaluation of the (355, 532) nm Particle Depolarization Ratio of Pure Pollen at 180.0° Lidar Backscattering Angle Remote Sensing lidar particle depolarization ratio pure pollen polarization lidar laboratory |
| title | Laboratory Evaluation of the (355, 532) nm Particle Depolarization Ratio of Pure Pollen at 180.0° Lidar Backscattering Angle |
| title_full | Laboratory Evaluation of the (355, 532) nm Particle Depolarization Ratio of Pure Pollen at 180.0° Lidar Backscattering Angle |
| title_fullStr | Laboratory Evaluation of the (355, 532) nm Particle Depolarization Ratio of Pure Pollen at 180.0° Lidar Backscattering Angle |
| title_full_unstemmed | Laboratory Evaluation of the (355, 532) nm Particle Depolarization Ratio of Pure Pollen at 180.0° Lidar Backscattering Angle |
| title_short | Laboratory Evaluation of the (355, 532) nm Particle Depolarization Ratio of Pure Pollen at 180.0° Lidar Backscattering Angle |
| title_sort | laboratory evaluation of the 355 532 nm particle depolarization ratio of pure pollen at 180 0° lidar backscattering angle |
| topic | lidar particle depolarization ratio pure pollen polarization lidar laboratory |
| url | https://www.mdpi.com/2072-4292/14/15/3767 |
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