Southern Ocean cloud properties derived from CAPRICORN and MARCUS data
The properties of Southern Ocean (SO) liquid phase non precipitating clouds (hereafter clouds) are examined using shipborne data collected during the Measurements of Aerosols, Radiation and Clouds over the Southern Ocean and the Clouds Aerosols Precipitation Radiation and atmospheric Composition Ove...
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Wiley-Blackwell Publishing Inc.
2021
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Online Access: | https://eprints.utas.edu.au/46725/ https://eprints.utas.edu.au/46725/1/150459%20-%20Southern%20Ocean%20cloud%20properties%20derived%20from%20CAPRICORN%20and%20MARCUS%20data.pdf |
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ftunivtasmania:oai:eprints.utas.edu.au:46725 2023-05-15T13:43:28+02:00 Southern Ocean cloud properties derived from CAPRICORN and MARCUS data Mace, GG Protat, A Humphries, RS Alexander, SP McRobert, IM Ward, J Selleck, P Keywood, M McFarquhar, GM 2021 application/pdf https://eprints.utas.edu.au/46725/ https://eprints.utas.edu.au/46725/1/150459%20-%20Southern%20Ocean%20cloud%20properties%20derived%20from%20CAPRICORN%20and%20MARCUS%20data.pdf en eng Wiley-Blackwell Publishing Inc. https://eprints.utas.edu.au/46725/1/150459%20-%20Southern%20Ocean%20cloud%20properties%20derived%20from%20CAPRICORN%20and%20MARCUS%20data.pdf Mace, GG, Protat, A, Humphries, RS, Alexander, SP, McRobert, IM, Ward, J, Selleck, P, Keywood, M and McFarquhar, GM 2021 , 'Southern Ocean cloud properties derived from CAPRICORN and MARCUS data' , Journal of Geophysical Research: Atmospheres, vol. 126, no. 4 , pp. 1-23 , doi:10.1029/2020JD033368 <http://dx.doi.org/10.1029/2020JD033368>. Southern Ocean cloud properties Article PeerReviewed 2021 ftunivtasmania https://doi.org/10.1029/2020JD033368 2022-08-08T22:16:37Z The properties of Southern Ocean (SO) liquid phase non precipitating clouds (hereafter clouds) are examined using shipborne data collected during the Measurements of Aerosols, Radiation and Clouds over the Southern Ocean and the Clouds Aerosols Precipitation Radiation and atmospheric Composition Over the SoutheRN ocean I and II campaigns that took place south of Australia during Autumn 2016 and Summer 2017–2018. Cloud properties are derived using data from W-band radars, lidars, and microwave radiometers using an optimal estimation algorithm. The SO clouds tended to have larger liquid water paths (LWP, 115 ± 117 g m−2), smaller effective radii (re, 8.7 ± 3 μm), and higher number concentrations (Nd, 90 ± 107 cm−3) than typical values of eastern ocean basin stratocumulus. The clouds demonstrated a tendency for the LWP to increase with Nd presumably due to precipitation suppression up to Nd of approximately 100 cm−3 when mean LWP decreased with increasing Nd. Due to higher optical depth, cloud albedos were less susceptible to changes in Nd compared to subtropical stratocumulus. The highest latitude clouds of the datasets, observed along and near the Antarctic coast, presented a distinctly bimodal character. One mode had the properties of marine clouds further north. The other mode occurred in an aerosol environment characterized by high cloud condensation nuclei concentrations and elevated sulfate aerosol without obvious continental aerosol markers. These regions of higher cloud condensation nuclei tended to have higher Nd, smaller re and higher LWP suggesting sensitivity of cloud properties to seasonal biogenic aerosol production in the high latitude SO. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean University of Tasmania: UTas ePrints Antarctic Southern Ocean The Antarctic Journal of Geophysical Research: Atmospheres 126 4 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
Southern Ocean cloud properties |
spellingShingle |
Southern Ocean cloud properties Mace, GG Protat, A Humphries, RS Alexander, SP McRobert, IM Ward, J Selleck, P Keywood, M McFarquhar, GM Southern Ocean cloud properties derived from CAPRICORN and MARCUS data |
topic_facet |
Southern Ocean cloud properties |
description |
The properties of Southern Ocean (SO) liquid phase non precipitating clouds (hereafter clouds) are examined using shipborne data collected during the Measurements of Aerosols, Radiation and Clouds over the Southern Ocean and the Clouds Aerosols Precipitation Radiation and atmospheric Composition Over the SoutheRN ocean I and II campaigns that took place south of Australia during Autumn 2016 and Summer 2017–2018. Cloud properties are derived using data from W-band radars, lidars, and microwave radiometers using an optimal estimation algorithm. The SO clouds tended to have larger liquid water paths (LWP, 115 ± 117 g m−2), smaller effective radii (re, 8.7 ± 3 μm), and higher number concentrations (Nd, 90 ± 107 cm−3) than typical values of eastern ocean basin stratocumulus. The clouds demonstrated a tendency for the LWP to increase with Nd presumably due to precipitation suppression up to Nd of approximately 100 cm−3 when mean LWP decreased with increasing Nd. Due to higher optical depth, cloud albedos were less susceptible to changes in Nd compared to subtropical stratocumulus. The highest latitude clouds of the datasets, observed along and near the Antarctic coast, presented a distinctly bimodal character. One mode had the properties of marine clouds further north. The other mode occurred in an aerosol environment characterized by high cloud condensation nuclei concentrations and elevated sulfate aerosol without obvious continental aerosol markers. These regions of higher cloud condensation nuclei tended to have higher Nd, smaller re and higher LWP suggesting sensitivity of cloud properties to seasonal biogenic aerosol production in the high latitude SO. |
format |
Article in Journal/Newspaper |
author |
Mace, GG Protat, A Humphries, RS Alexander, SP McRobert, IM Ward, J Selleck, P Keywood, M McFarquhar, GM |
author_facet |
Mace, GG Protat, A Humphries, RS Alexander, SP McRobert, IM Ward, J Selleck, P Keywood, M McFarquhar, GM |
author_sort |
Mace, GG |
title |
Southern Ocean cloud properties derived from CAPRICORN and MARCUS data |
title_short |
Southern Ocean cloud properties derived from CAPRICORN and MARCUS data |
title_full |
Southern Ocean cloud properties derived from CAPRICORN and MARCUS data |
title_fullStr |
Southern Ocean cloud properties derived from CAPRICORN and MARCUS data |
title_full_unstemmed |
Southern Ocean cloud properties derived from CAPRICORN and MARCUS data |
title_sort |
southern ocean cloud properties derived from capricorn and marcus data |
publisher |
Wiley-Blackwell Publishing Inc. |
publishDate |
2021 |
url |
https://eprints.utas.edu.au/46725/ https://eprints.utas.edu.au/46725/1/150459%20-%20Southern%20Ocean%20cloud%20properties%20derived%20from%20CAPRICORN%20and%20MARCUS%20data.pdf |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
https://eprints.utas.edu.au/46725/1/150459%20-%20Southern%20Ocean%20cloud%20properties%20derived%20from%20CAPRICORN%20and%20MARCUS%20data.pdf Mace, GG, Protat, A, Humphries, RS, Alexander, SP, McRobert, IM, Ward, J, Selleck, P, Keywood, M and McFarquhar, GM 2021 , 'Southern Ocean cloud properties derived from CAPRICORN and MARCUS data' , Journal of Geophysical Research: Atmospheres, vol. 126, no. 4 , pp. 1-23 , doi:10.1029/2020JD033368 <http://dx.doi.org/10.1029/2020JD033368>. |
op_doi |
https://doi.org/10.1029/2020JD033368 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
126 |
container_issue |
4 |
_version_ |
1766189310705401856 |