Optical and microphysical properties of ice crystals in Arctic clouds from lidar observations
International audience The vertical profiles of the optical properties, effective radius of ice crystals and ice water content (IWC) in Arctic semi-transparent stratiform clouds were assessed using quantitative ground-based lidar measurements performed from 13 to 26 May 2016 in Hammerfest (north of...
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ftsorbonneuniv:oai:HAL:insu-04172412v1 2023-11-05T03:38:46+01:00 Optical and microphysical properties of ice crystals in Arctic clouds from lidar observations Chazette, Patrick Raut, Jean-Christophe Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) TROPO - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 2023-07-27 https://insu.hal.science/insu-04172412 https://insu.hal.science/insu-04172412/document https://insu.hal.science/insu-04172412/file/amt-2023-122.pdf https://doi.org/10.5194/amt-2023-122 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.5194/amt-2023-122 insu-04172412 https://insu.hal.science/insu-04172412 https://insu.hal.science/insu-04172412/document https://insu.hal.science/insu-04172412/file/amt-2023-122.pdf doi:10.5194/amt-2023-122 info:eu-repo/semantics/OpenAccess https://insu.hal.science/insu-04172412 2023 Arctic stratiform clouds lidar optical properties ice microphysical properties effective radius ice water content 30 [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/preprint Preprints, Working Papers, . 2023 ftsorbonneuniv https://doi.org/10.5194/amt-2023-122 2023-10-10T22:39:42Z International audience The vertical profiles of the optical properties, effective radius of ice crystals and ice water content (IWC) in Arctic semi-transparent stratiform clouds were assessed using quantitative ground-based lidar measurements performed from 13 to 26 May 2016 in Hammerfest (north of Norway, 70° 39′ 48″ North, 23° 41′ 00″ East). The field campaign was 15 part of the Pollution in the ARCtic System (PARCS) project of the French Arctic Initiative. The presence of low-level semi-transparent stratus clouds was noted on 16 and 17 May, and they were sampled continuously by a ground-based Raman-N2 lidar emitting at the wavelength of 355 nm. These clouds were located just above the atmospheric boundary layer where the 0°C isotherm reached around 800 m above the mean sea level (a.m.s.l.). To ensure the best 20 penetration of the laser beam into the cloud, we selected case studies with cloud optical thickness (COT). Lidar-derived multiple scattering coefficients were found to be close to 1 and ice crystal depolarization around 10%, suggesting that ice crystals were small and had a rather spherical shape. This agrees with our Mie computations determining effective radii between ~5 and 20 µm in the clouds for ice water contents between 1 and 8 mg m-3 , respectively. Direct 25 estimate of the microphysical parameters of ice clouds via lidar measurements is a significant asset for the study of their large-scale radiative impact, while reducing the need for experimental resources. Report Arctic Hammerfest HAL Sorbonne Université |
institution |
Open Polar |
collection |
HAL Sorbonne Université |
op_collection_id |
ftsorbonneuniv |
language |
English |
topic |
Arctic stratiform clouds lidar optical properties ice microphysical properties effective radius ice water content 30 [SDU]Sciences of the Universe [physics] |
spellingShingle |
Arctic stratiform clouds lidar optical properties ice microphysical properties effective radius ice water content 30 [SDU]Sciences of the Universe [physics] Chazette, Patrick Raut, Jean-Christophe Optical and microphysical properties of ice crystals in Arctic clouds from lidar observations |
topic_facet |
Arctic stratiform clouds lidar optical properties ice microphysical properties effective radius ice water content 30 [SDU]Sciences of the Universe [physics] |
description |
International audience The vertical profiles of the optical properties, effective radius of ice crystals and ice water content (IWC) in Arctic semi-transparent stratiform clouds were assessed using quantitative ground-based lidar measurements performed from 13 to 26 May 2016 in Hammerfest (north of Norway, 70° 39′ 48″ North, 23° 41′ 00″ East). The field campaign was 15 part of the Pollution in the ARCtic System (PARCS) project of the French Arctic Initiative. The presence of low-level semi-transparent stratus clouds was noted on 16 and 17 May, and they were sampled continuously by a ground-based Raman-N2 lidar emitting at the wavelength of 355 nm. These clouds were located just above the atmospheric boundary layer where the 0°C isotherm reached around 800 m above the mean sea level (a.m.s.l.). To ensure the best 20 penetration of the laser beam into the cloud, we selected case studies with cloud optical thickness (COT). Lidar-derived multiple scattering coefficients were found to be close to 1 and ice crystal depolarization around 10%, suggesting that ice crystals were small and had a rather spherical shape. This agrees with our Mie computations determining effective radii between ~5 and 20 µm in the clouds for ice water contents between 1 and 8 mg m-3 , respectively. Direct 25 estimate of the microphysical parameters of ice clouds via lidar measurements is a significant asset for the study of their large-scale radiative impact, while reducing the need for experimental resources. |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) TROPO - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Report |
author |
Chazette, Patrick Raut, Jean-Christophe |
author_facet |
Chazette, Patrick Raut, Jean-Christophe |
author_sort |
Chazette, Patrick |
title |
Optical and microphysical properties of ice crystals in Arctic clouds from lidar observations |
title_short |
Optical and microphysical properties of ice crystals in Arctic clouds from lidar observations |
title_full |
Optical and microphysical properties of ice crystals in Arctic clouds from lidar observations |
title_fullStr |
Optical and microphysical properties of ice crystals in Arctic clouds from lidar observations |
title_full_unstemmed |
Optical and microphysical properties of ice crystals in Arctic clouds from lidar observations |
title_sort |
optical and microphysical properties of ice crystals in arctic clouds from lidar observations |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://insu.hal.science/insu-04172412 https://insu.hal.science/insu-04172412/document https://insu.hal.science/insu-04172412/file/amt-2023-122.pdf https://doi.org/10.5194/amt-2023-122 |
genre |
Arctic Hammerfest |
genre_facet |
Arctic Hammerfest |
op_source |
https://insu.hal.science/insu-04172412 2023 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/amt-2023-122 insu-04172412 https://insu.hal.science/insu-04172412 https://insu.hal.science/insu-04172412/document https://insu.hal.science/insu-04172412/file/amt-2023-122.pdf doi:10.5194/amt-2023-122 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/amt-2023-122 |
_version_ |
1781694518216622080 |