In situ observations of supercooled liquid clouds over the Southern Ocean during the HIAPER Pole-to-Pole Observation campaigns
Clouds over the Southern Ocean exist in a pristine environment that results in unique microphysical properties. However, in situ observations of these clouds are rare, and the dominant precipitation processes are unknown. Uncertainties in their life cycles and radiative properties make them interest...
Published in: | Geophysical Research Letters |
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Format: | Article in Journal/Newspaper |
Language: | English |
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American Geophysical Union
2013
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Online Access: | http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-019-922 https://doi.org/10.1002/grl.50986 |
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ftncar:oai:drupal-site.org:articles_13026 2023-09-05T13:23:25+02:00 In situ observations of supercooled liquid clouds over the Southern Ocean during the HIAPER Pole-to-Pole Observation campaigns Chubb, Thomas (author) Jensen, Jorgen (author) Siems, Steven (author) Manton, Michael (author) 2013-10-16 application/pdf http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-019-922 https://doi.org/10.1002/grl.50986 en eng American Geophysical Union Geophysical Research Letters http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-019-922 doi:10.1002/grl.50986 ark:/85065/d7ns0vt2 Copyright 2013 American Geophysical Union Supercooled liquid clouds Southern Ocean clouds Text article 2013 ftncar https://doi.org/10.1002/grl.50986 2023-08-14T18:38:31Z Clouds over the Southern Ocean exist in a pristine environment that results in unique microphysical properties. However, in situ observations of these clouds are rare, and the dominant precipitation processes are unknown. Uncertainties in their life cycles and radiative properties make them interesting from a weather and climate perspective. Data from the standard cloud physics payload during the High-performance Instrumented Airborne Platform for Environmental Research (HIAPER) Pole-to-Pole Observations global transects provide a unique snapshot the nature of low-level clouds in the Southern Ocean. High quantities of supercooled liquid water (up to 0.47gm⁻³) were observed in clouds as cold as -22°C during two flights in different seasons and different meteorological conditions, supporting climatologies inferred from satellite observations. Cloud droplet concentrations were calculated from mean droplet size and liquid water concentrations, and were in the range of 30–120cm⁻³, which is fairly typical for the pristine Southern Ocean environment. Ice in nonprecipitating or lightly precipitating clouds was found to be rare, while drizzle drops with diameter greater than 100μm formed through warm rain processes were widespread. Large, pristine crystals were commonly seen in very low concentrations below cloud base. Article in Journal/Newspaper Southern Ocean OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Southern Ocean Geophysical Research Letters 40 19 5280 5285 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
topic |
Supercooled liquid clouds Southern Ocean clouds |
spellingShingle |
Supercooled liquid clouds Southern Ocean clouds In situ observations of supercooled liquid clouds over the Southern Ocean during the HIAPER Pole-to-Pole Observation campaigns |
topic_facet |
Supercooled liquid clouds Southern Ocean clouds |
description |
Clouds over the Southern Ocean exist in a pristine environment that results in unique microphysical properties. However, in situ observations of these clouds are rare, and the dominant precipitation processes are unknown. Uncertainties in their life cycles and radiative properties make them interesting from a weather and climate perspective. Data from the standard cloud physics payload during the High-performance Instrumented Airborne Platform for Environmental Research (HIAPER) Pole-to-Pole Observations global transects provide a unique snapshot the nature of low-level clouds in the Southern Ocean. High quantities of supercooled liquid water (up to 0.47gm⁻³) were observed in clouds as cold as -22°C during two flights in different seasons and different meteorological conditions, supporting climatologies inferred from satellite observations. Cloud droplet concentrations were calculated from mean droplet size and liquid water concentrations, and were in the range of 30–120cm⁻³, which is fairly typical for the pristine Southern Ocean environment. Ice in nonprecipitating or lightly precipitating clouds was found to be rare, while drizzle drops with diameter greater than 100μm formed through warm rain processes were widespread. Large, pristine crystals were commonly seen in very low concentrations below cloud base. |
author2 |
Chubb, Thomas (author) Jensen, Jorgen (author) Siems, Steven (author) Manton, Michael (author) |
format |
Article in Journal/Newspaper |
title |
In situ observations of supercooled liquid clouds over the Southern Ocean during the HIAPER Pole-to-Pole Observation campaigns |
title_short |
In situ observations of supercooled liquid clouds over the Southern Ocean during the HIAPER Pole-to-Pole Observation campaigns |
title_full |
In situ observations of supercooled liquid clouds over the Southern Ocean during the HIAPER Pole-to-Pole Observation campaigns |
title_fullStr |
In situ observations of supercooled liquid clouds over the Southern Ocean during the HIAPER Pole-to-Pole Observation campaigns |
title_full_unstemmed |
In situ observations of supercooled liquid clouds over the Southern Ocean during the HIAPER Pole-to-Pole Observation campaigns |
title_sort |
in situ observations of supercooled liquid clouds over the southern ocean during the hiaper pole-to-pole observation campaigns |
publisher |
American Geophysical Union |
publishDate |
2013 |
url |
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-019-922 https://doi.org/10.1002/grl.50986 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
Geophysical Research Letters http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-019-922 doi:10.1002/grl.50986 ark:/85065/d7ns0vt2 |
op_rights |
Copyright 2013 American Geophysical Union |
op_doi |
https://doi.org/10.1002/grl.50986 |
container_title |
Geophysical Research Letters |
container_volume |
40 |
container_issue |
19 |
container_start_page |
5280 |
op_container_end_page |
5285 |
_version_ |
1776203999642386432 |