Physical properties of High Arctic tropospheric particles during winter
A climatology of particle scattering properties in the wintertime High Arctic troposphere, including vertical distributions and effective radii, is presented. The measurements were obtained using a lidar and cloud radar located at Eureka, Nunavut Territory (80° N, 86° W). Four different particle gro...
Main Authors: | , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2009
|
Subjects: | |
Online Access: | https://doaj.org/article/cf4a44d6d3ff41bfbf1eadb0e1f76b45 |
id |
ftdoajarticles:oai:doaj.org/article:cf4a44d6d3ff41bfbf1eadb0e1f76b45 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:cf4a44d6d3ff41bfbf1eadb0e1f76b45 2023-05-15T14:54:18+02:00 Physical properties of High Arctic tropospheric particles during winter L. Bourdages T. J. Duck G. Lesins J. R. Drummond E. W. Eloranta 2009-09-01T00:00:00Z https://doaj.org/article/cf4a44d6d3ff41bfbf1eadb0e1f76b45 EN eng Copernicus Publications http://www.atmos-chem-phys.net/9/6881/2009/acp-9-6881-2009.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 https://doaj.org/article/cf4a44d6d3ff41bfbf1eadb0e1f76b45 Atmospheric Chemistry and Physics, Vol 9, Iss 18, Pp 6881-6897 (2009) Physics QC1-999 Chemistry QD1-999 article 2009 ftdoajarticles 2022-12-31T04:35:55Z A climatology of particle scattering properties in the wintertime High Arctic troposphere, including vertical distributions and effective radii, is presented. The measurements were obtained using a lidar and cloud radar located at Eureka, Nunavut Territory (80° N, 86° W). Four different particle groupings are considered: boundary-layer ice crystals, ice clouds, mixed-phase clouds, and aerosols. Two-dimensional histograms of occurrence probabilities against depolarization, radar/lidar colour ratio and height are given. Colour ratios are related to particle minimum dimensions (i.e., widths rather than lengths) using a Mie scattering model. Ice cloud crystals have effective radii spanning 25–220 µm, with larger particles observed at lower altitudes. Topographic blowing snow residuals in the boundary layer have the smallest crystals at 15–70 µm. Mixed-phase clouds have water droplets and ice crystal precipitation in the 5–40 µm and 40–220 µm ranges, respectively. Ice cloud crystals have depolarization decreasing with height. The depolarization trend is associated with the large ice crystal sub-population. Small crystals depolarize more than large ones in ice clouds at a given altitude, and show constant modal depolarization with height. Ice clouds in the mid-troposphere are sometimes observed to precipitate to the ground. Water clouds are constrained to the lower troposphere (0.5–3.5 km altitude). Aerosols are most abundant near the ground and are frequently mixed with the other particle types. The data are used to construct a classification chart for particle scattering in wintertime Arctic conditions. Article in Journal/Newspaper Arctic Eureka Nunavut Directory of Open Access Journals: DOAJ Articles Arctic Nunavut Eureka ENVELOPE(-85.940,-85.940,79.990,79.990) |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 L. Bourdages T. J. Duck G. Lesins J. R. Drummond E. W. Eloranta Physical properties of High Arctic tropospheric particles during winter |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
A climatology of particle scattering properties in the wintertime High Arctic troposphere, including vertical distributions and effective radii, is presented. The measurements were obtained using a lidar and cloud radar located at Eureka, Nunavut Territory (80° N, 86° W). Four different particle groupings are considered: boundary-layer ice crystals, ice clouds, mixed-phase clouds, and aerosols. Two-dimensional histograms of occurrence probabilities against depolarization, radar/lidar colour ratio and height are given. Colour ratios are related to particle minimum dimensions (i.e., widths rather than lengths) using a Mie scattering model. Ice cloud crystals have effective radii spanning 25–220 µm, with larger particles observed at lower altitudes. Topographic blowing snow residuals in the boundary layer have the smallest crystals at 15–70 µm. Mixed-phase clouds have water droplets and ice crystal precipitation in the 5–40 µm and 40–220 µm ranges, respectively. Ice cloud crystals have depolarization decreasing with height. The depolarization trend is associated with the large ice crystal sub-population. Small crystals depolarize more than large ones in ice clouds at a given altitude, and show constant modal depolarization with height. Ice clouds in the mid-troposphere are sometimes observed to precipitate to the ground. Water clouds are constrained to the lower troposphere (0.5–3.5 km altitude). Aerosols are most abundant near the ground and are frequently mixed with the other particle types. The data are used to construct a classification chart for particle scattering in wintertime Arctic conditions. |
format |
Article in Journal/Newspaper |
author |
L. Bourdages T. J. Duck G. Lesins J. R. Drummond E. W. Eloranta |
author_facet |
L. Bourdages T. J. Duck G. Lesins J. R. Drummond E. W. Eloranta |
author_sort |
L. Bourdages |
title |
Physical properties of High Arctic tropospheric particles during winter |
title_short |
Physical properties of High Arctic tropospheric particles during winter |
title_full |
Physical properties of High Arctic tropospheric particles during winter |
title_fullStr |
Physical properties of High Arctic tropospheric particles during winter |
title_full_unstemmed |
Physical properties of High Arctic tropospheric particles during winter |
title_sort |
physical properties of high arctic tropospheric particles during winter |
publisher |
Copernicus Publications |
publishDate |
2009 |
url |
https://doaj.org/article/cf4a44d6d3ff41bfbf1eadb0e1f76b45 |
long_lat |
ENVELOPE(-85.940,-85.940,79.990,79.990) |
geographic |
Arctic Nunavut Eureka |
geographic_facet |
Arctic Nunavut Eureka |
genre |
Arctic Eureka Nunavut |
genre_facet |
Arctic Eureka Nunavut |
op_source |
Atmospheric Chemistry and Physics, Vol 9, Iss 18, Pp 6881-6897 (2009) |
op_relation |
http://www.atmos-chem-phys.net/9/6881/2009/acp-9-6881-2009.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 https://doaj.org/article/cf4a44d6d3ff41bfbf1eadb0e1f76b45 |
_version_ |
1766326018228879360 |