Arctic mixed-phase cloud properties derived from surface-based sensors at
Arctic mixed-phase cloud macro- and microphysical properties are derived from a year of radar, lidar, microwave radiometer, and radiosonde observations made as part of the Surface Heat Budget of the Arctic Ocean (SHEBA) Program in the Beaufort Sea in 1997–98. Mixed-phase clouds occurred 41 % of the...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.468.1786 2023-05-15T14:56:57+02:00 Arctic mixed-phase cloud properties derived from surface-based sensors at Matthew D. Shupe Sergey Y. Matrosov The Pennsylvania State University CiteSeerX Archives 2006 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.468.1786 http://www.esrl.noaa.gov/psd/people/matthew.shupe/publications/Shupeetal.JAS2006.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.468.1786 http://www.esrl.noaa.gov/psd/people/matthew.shupe/publications/Shupeetal.JAS2006.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.esrl.noaa.gov/psd/people/matthew.shupe/publications/Shupeetal.JAS2006.pdf text 2006 ftciteseerx 2016-01-08T07:03:23Z Arctic mixed-phase cloud macro- and microphysical properties are derived from a year of radar, lidar, microwave radiometer, and radiosonde observations made as part of the Surface Heat Budget of the Arctic Ocean (SHEBA) Program in the Beaufort Sea in 1997–98. Mixed-phase clouds occurred 41 % of the time and were most frequent in the spring and fall transition seasons. These clouds often consisted of a shallow, cloud-top liquid layer from which ice particles formed and fell, although deep, multilayered mixed-phase cloud scenes were also observed. On average, individual cloud layers persisted for 12 h, while some mixed-phase cloud systems lasted for many days. Ninety percent of the observed mixed-phase clouds were 0.5–3 km thick, had a cloud base of 0–2 km, and resided at a temperature of 25 ° to 5°C. Under the assumption that the relatively large ice crystals dominate the radar signal, ice properties were retrieved from these clouds using radar reflectivity measurements. The annual average ice particle mean diameter, ice water content, and ice water path were 93 m, 0.027 g m3, and 42 g m2, respectively. These values are all larger than those found in single-phase ice clouds at SHEBA. Vertically resolved cloud liquid properties were not retrieved; however, the annual average, microwave radiometer–derived liquid water path (LWP) in mixed-phase clouds was 61 g m2. This value is larger than the average LWP observed in single-phase liquid clouds because the liquid water layers in the mixed-phase clouds tended to be thicker than those in all-liquid clouds. Although mixed-phase clouds were observed down to temperatures of about 40°C, the liquid fraction (ratio of LWP to total condensed water path) increased on average from zero at 24°C to one at 14°C. The observations show a range of 25°C at any given liquid fraction and a phase transition relationship that may change moderately with season. 1. Text Arctic Arctic Ocean Beaufort Sea Surface Heat Budget of the Arctic Ocean Unknown Arctic Arctic Ocean |
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English |
description |
Arctic mixed-phase cloud macro- and microphysical properties are derived from a year of radar, lidar, microwave radiometer, and radiosonde observations made as part of the Surface Heat Budget of the Arctic Ocean (SHEBA) Program in the Beaufort Sea in 1997–98. Mixed-phase clouds occurred 41 % of the time and were most frequent in the spring and fall transition seasons. These clouds often consisted of a shallow, cloud-top liquid layer from which ice particles formed and fell, although deep, multilayered mixed-phase cloud scenes were also observed. On average, individual cloud layers persisted for 12 h, while some mixed-phase cloud systems lasted for many days. Ninety percent of the observed mixed-phase clouds were 0.5–3 km thick, had a cloud base of 0–2 km, and resided at a temperature of 25 ° to 5°C. Under the assumption that the relatively large ice crystals dominate the radar signal, ice properties were retrieved from these clouds using radar reflectivity measurements. The annual average ice particle mean diameter, ice water content, and ice water path were 93 m, 0.027 g m3, and 42 g m2, respectively. These values are all larger than those found in single-phase ice clouds at SHEBA. Vertically resolved cloud liquid properties were not retrieved; however, the annual average, microwave radiometer–derived liquid water path (LWP) in mixed-phase clouds was 61 g m2. This value is larger than the average LWP observed in single-phase liquid clouds because the liquid water layers in the mixed-phase clouds tended to be thicker than those in all-liquid clouds. Although mixed-phase clouds were observed down to temperatures of about 40°C, the liquid fraction (ratio of LWP to total condensed water path) increased on average from zero at 24°C to one at 14°C. The observations show a range of 25°C at any given liquid fraction and a phase transition relationship that may change moderately with season. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Matthew D. Shupe Sergey Y. Matrosov |
spellingShingle |
Matthew D. Shupe Sergey Y. Matrosov Arctic mixed-phase cloud properties derived from surface-based sensors at |
author_facet |
Matthew D. Shupe Sergey Y. Matrosov |
author_sort |
Matthew D. Shupe |
title |
Arctic mixed-phase cloud properties derived from surface-based sensors at |
title_short |
Arctic mixed-phase cloud properties derived from surface-based sensors at |
title_full |
Arctic mixed-phase cloud properties derived from surface-based sensors at |
title_fullStr |
Arctic mixed-phase cloud properties derived from surface-based sensors at |
title_full_unstemmed |
Arctic mixed-phase cloud properties derived from surface-based sensors at |
title_sort |
arctic mixed-phase cloud properties derived from surface-based sensors at |
publishDate |
2006 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.468.1786 http://www.esrl.noaa.gov/psd/people/matthew.shupe/publications/Shupeetal.JAS2006.pdf |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Beaufort Sea Surface Heat Budget of the Arctic Ocean |
genre_facet |
Arctic Arctic Ocean Beaufort Sea Surface Heat Budget of the Arctic Ocean |
op_source |
http://www.esrl.noaa.gov/psd/people/matthew.shupe/publications/Shupeetal.JAS2006.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.468.1786 http://www.esrl.noaa.gov/psd/people/matthew.shupe/publications/Shupeetal.JAS2006.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766329001885827072 |