PHIPS-HALO: The airborne Particle Habit Imaging and Polar Scattering probe – Part 3: Single-particle phase discrimination and particle size distribution based on the angular-scattering function
A major challenge for in situ observations in mixed-phase clouds remains the phase discrimination and sizing of cloud hydrometeors. In this work, we present a new method for determining the phase of individual cloud hydrometeors based on their angular-light-scattering behavior employed by the PHIPS...
Published in: | Atmospheric Measurement Techniques |
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Online Access: | https://doi.org/10.5194/amt-14-3049-2021 |
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ftncar:oai:drupal-site.org:articles_24386 2024-04-14T08:08:03+00:00 PHIPS-HALO: The airborne Particle Habit Imaging and Polar Scattering probe – Part 3: Single-particle phase discrimination and particle size distribution based on the angular-scattering function Waitz, Fritz (author) Schnaiter, Martin (author) Leisner, Thomas (author) Järvinen, Emma (author) 2021-04-27 https://doi.org/10.5194/amt-14-3049-2021 en eng Atmospheric Measurement Techniques--Atmos. Meas. Tech.--1867-8548 NSF/NCAR GV HIAPER 2D-S Particle Size Distribution (PSD) Product Data. Version 1.1--10.26023/8HMG-WQP3-XA0X SOCRATES: NCAR HCR radar and HSRL lidar moments data. Version 3.2--10.5065/D64J0CZS PHIPS-HALO Single Particle Data. Version 1.0--10.5065/D6639NKQ SOCRATES: Low Rate (LRT - 1 sps) Navigation, State Parameter, and Microphysics Flight-Level Data. Version 1.3--10.5065/D6M32TM9 PHIPS_phase_discr.m--10.5281/zenodo.4321316 articles:24386 ark:/85065/d7nc64mt doi:10.5194/amt-14-3049-2021 Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. article Text 2021 ftncar https://doi.org/10.5194/amt-14-3049-2021 2024-03-21T18:00:26Z A major challenge for in situ observations in mixed-phase clouds remains the phase discrimination and sizing of cloud hydrometeors. In this work, we present a new method for determining the phase of individual cloud hydrometeors based on their angular-light-scattering behavior employed by the PHIPS (Particle Habit Imaging and Polar Scattering) airborne cloud probe. The phase discrimination algorithm is based on the difference of distinct features in the angular-scattering function of spherical and aspherical particles. The algorithm is calibrated and evaluated using a large data set gathered during two in situ aircraft campaigns in the Arctic and Southern Ocean. Comparison of the algorithm with manually classified particles showed that we can confidently discriminate between spherical and aspherical particles with a 98% accuracy. Furthermore, we present a method for deriving particle size distributions based on single-particle angular-scattering data for particles in a size range from 100 mu m <= D <= 700 mu m and 20 mu m <= D <= 700 mu m for droplets and ice particles, respectively. The functionality of these methods is demonstrated in three representative case studies. Article in Journal/Newspaper Arctic Southern Ocean OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Arctic Southern Ocean Atmospheric Measurement Techniques 14 4 3049 3070 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
A major challenge for in situ observations in mixed-phase clouds remains the phase discrimination and sizing of cloud hydrometeors. In this work, we present a new method for determining the phase of individual cloud hydrometeors based on their angular-light-scattering behavior employed by the PHIPS (Particle Habit Imaging and Polar Scattering) airborne cloud probe. The phase discrimination algorithm is based on the difference of distinct features in the angular-scattering function of spherical and aspherical particles. The algorithm is calibrated and evaluated using a large data set gathered during two in situ aircraft campaigns in the Arctic and Southern Ocean. Comparison of the algorithm with manually classified particles showed that we can confidently discriminate between spherical and aspherical particles with a 98% accuracy. Furthermore, we present a method for deriving particle size distributions based on single-particle angular-scattering data for particles in a size range from 100 mu m <= D <= 700 mu m and 20 mu m <= D <= 700 mu m for droplets and ice particles, respectively. The functionality of these methods is demonstrated in three representative case studies. |
author2 |
Waitz, Fritz (author) Schnaiter, Martin (author) Leisner, Thomas (author) Järvinen, Emma (author) |
format |
Article in Journal/Newspaper |
title |
PHIPS-HALO: The airborne Particle Habit Imaging and Polar Scattering probe – Part 3: Single-particle phase discrimination and particle size distribution based on the angular-scattering function |
spellingShingle |
PHIPS-HALO: The airborne Particle Habit Imaging and Polar Scattering probe – Part 3: Single-particle phase discrimination and particle size distribution based on the angular-scattering function |
title_short |
PHIPS-HALO: The airborne Particle Habit Imaging and Polar Scattering probe – Part 3: Single-particle phase discrimination and particle size distribution based on the angular-scattering function |
title_full |
PHIPS-HALO: The airborne Particle Habit Imaging and Polar Scattering probe – Part 3: Single-particle phase discrimination and particle size distribution based on the angular-scattering function |
title_fullStr |
PHIPS-HALO: The airborne Particle Habit Imaging and Polar Scattering probe – Part 3: Single-particle phase discrimination and particle size distribution based on the angular-scattering function |
title_full_unstemmed |
PHIPS-HALO: The airborne Particle Habit Imaging and Polar Scattering probe – Part 3: Single-particle phase discrimination and particle size distribution based on the angular-scattering function |
title_sort |
phips-halo: the airborne particle habit imaging and polar scattering probe – part 3: single-particle phase discrimination and particle size distribution based on the angular-scattering function |
publishDate |
2021 |
url |
https://doi.org/10.5194/amt-14-3049-2021 |
geographic |
Arctic Southern Ocean |
geographic_facet |
Arctic Southern Ocean |
genre |
Arctic Southern Ocean |
genre_facet |
Arctic Southern Ocean |
op_relation |
Atmospheric Measurement Techniques--Atmos. Meas. Tech.--1867-8548 NSF/NCAR GV HIAPER 2D-S Particle Size Distribution (PSD) Product Data. Version 1.1--10.26023/8HMG-WQP3-XA0X SOCRATES: NCAR HCR radar and HSRL lidar moments data. Version 3.2--10.5065/D64J0CZS PHIPS-HALO Single Particle Data. Version 1.0--10.5065/D6639NKQ SOCRATES: Low Rate (LRT - 1 sps) Navigation, State Parameter, and Microphysics Flight-Level Data. Version 1.3--10.5065/D6M32TM9 PHIPS_phase_discr.m--10.5281/zenodo.4321316 articles:24386 ark:/85065/d7nc64mt doi:10.5194/amt-14-3049-2021 |
op_rights |
Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. |
op_doi |
https://doi.org/10.5194/amt-14-3049-2021 |
container_title |
Atmospheric Measurement Techniques |
container_volume |
14 |
container_issue |
4 |
container_start_page |
3049 |
op_container_end_page |
3070 |
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1796305493849800704 |