Cloud and boundary layer interactions over the Arctic sea ice in late summer
Observations from the Arctic Summer Cloud Ocean Study (ASCOS), in the central Arctic sea-ice pack in late summer 2008, provide a detailed view of cloud- atmosphere-surface interactions and vertical mixing processes over the sea-ice environment. Measurements from a suite of ground-based remote sensor...
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Online Access: | https://eprints.whiterose.ac.uk/77208/ https://eprints.whiterose.ac.uk/77208/10/Shupe_2013_acp-13-9379-2013-1_with_coversheet.pdf https://doi.org/10.5194/acp-13-9379-2013 |
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ftleedsuniv:oai:eprints.whiterose.ac.uk:77208 2024-06-02T07:59:42+00:00 Cloud and boundary layer interactions over the Arctic sea ice in late summer Shupe, MD Persson, POG Brooks, IM Tjernström, M Leck, C Sedlar, J Mauritsen, T Sjogren, S 2013 text https://eprints.whiterose.ac.uk/77208/ https://eprints.whiterose.ac.uk/77208/10/Shupe_2013_acp-13-9379-2013-1_with_coversheet.pdf https://doi.org/10.5194/acp-13-9379-2013 en eng European Geosciences Union https://eprints.whiterose.ac.uk/77208/10/Shupe_2013_acp-13-9379-2013-1_with_coversheet.pdf Shupe, MD, Persson, POG, Brooks, IM et al. (5 more authors) (2013) Cloud and boundary layer interactions over the Arctic sea ice in late summer. Atmospheric Chemistry and Physics, 13 (18). 9379 - 9400. ISSN 1680-7316 Article NonPeerReviewed 2013 ftleedsuniv https://doi.org/10.5194/acp-13-9379-2013 2024-05-06T12:40:54Z Observations from the Arctic Summer Cloud Ocean Study (ASCOS), in the central Arctic sea-ice pack in late summer 2008, provide a detailed view of cloud- atmosphere-surface interactions and vertical mixing processes over the sea-ice environment. Measurements from a suite of ground-based remote sensors, near-surface meteorological and aerosol instruments, and profiles from radiosondes and a helicopter are combined to characterize a weeklong period dominated by low-level, mixed-phase, stratocumulus clouds. Detailed case studies and statistical analyses are used to develop a conceptual model for the cloud and atmosphere structure and their interactions in this environment. Clouds were persistent during the period of study, having qualities that suggest they were sustained through a combination of advective influences and in-cloud processes, with little contribution from the surface. Radiative cooling near cloud top produced buoyancy-driven, turbulent eddies that contributed to cloud formation and created a cloud-driven mixed layer. The depth of this mixed layer was related to the amount of turbulence and condensed cloud water. Coupling of this cloud-driven mixed layer to the surface boundary layer was primarily determined by proximity. For 75%of the period of study, the primary stratocumulus cloud-driven mixed layer was decoupled from the surface and typically at a warmer potential temperature. Since the near-surface temperature was constrained by the ocean-ice mixture, warm temperatures aloft suggest that these air masses had not significantly interacted with the sea-ice surface. Instead, backtrajectory analyses suggest that these warm air masses advected into the central Arctic Basin from lower latitudes. Moisture and aerosol particles likely accompanied these air masses, providing necessary support for cloud formation. On the occasions when cloud-surface coupling did occur, back trajectories indicated that these air masses advected at low levels, while mixing processes kept the mixed layer in equilibrium with the ... Article in Journal/Newspaper Arctic Arctic Basin Arctic ice pack Sea ice White Rose Research Online (Universities of Leeds, Sheffield & York) Arctic Atmospheric Chemistry and Physics 13 18 9379 9399 |
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Open Polar |
collection |
White Rose Research Online (Universities of Leeds, Sheffield & York) |
op_collection_id |
ftleedsuniv |
language |
English |
description |
Observations from the Arctic Summer Cloud Ocean Study (ASCOS), in the central Arctic sea-ice pack in late summer 2008, provide a detailed view of cloud- atmosphere-surface interactions and vertical mixing processes over the sea-ice environment. Measurements from a suite of ground-based remote sensors, near-surface meteorological and aerosol instruments, and profiles from radiosondes and a helicopter are combined to characterize a weeklong period dominated by low-level, mixed-phase, stratocumulus clouds. Detailed case studies and statistical analyses are used to develop a conceptual model for the cloud and atmosphere structure and their interactions in this environment. Clouds were persistent during the period of study, having qualities that suggest they were sustained through a combination of advective influences and in-cloud processes, with little contribution from the surface. Radiative cooling near cloud top produced buoyancy-driven, turbulent eddies that contributed to cloud formation and created a cloud-driven mixed layer. The depth of this mixed layer was related to the amount of turbulence and condensed cloud water. Coupling of this cloud-driven mixed layer to the surface boundary layer was primarily determined by proximity. For 75%of the period of study, the primary stratocumulus cloud-driven mixed layer was decoupled from the surface and typically at a warmer potential temperature. Since the near-surface temperature was constrained by the ocean-ice mixture, warm temperatures aloft suggest that these air masses had not significantly interacted with the sea-ice surface. Instead, backtrajectory analyses suggest that these warm air masses advected into the central Arctic Basin from lower latitudes. Moisture and aerosol particles likely accompanied these air masses, providing necessary support for cloud formation. On the occasions when cloud-surface coupling did occur, back trajectories indicated that these air masses advected at low levels, while mixing processes kept the mixed layer in equilibrium with the ... |
format |
Article in Journal/Newspaper |
author |
Shupe, MD Persson, POG Brooks, IM Tjernström, M Leck, C Sedlar, J Mauritsen, T Sjogren, S |
spellingShingle |
Shupe, MD Persson, POG Brooks, IM Tjernström, M Leck, C Sedlar, J Mauritsen, T Sjogren, S Cloud and boundary layer interactions over the Arctic sea ice in late summer |
author_facet |
Shupe, MD Persson, POG Brooks, IM Tjernström, M Leck, C Sedlar, J Mauritsen, T Sjogren, S |
author_sort |
Shupe, MD |
title |
Cloud and boundary layer interactions over the Arctic sea ice in late summer |
title_short |
Cloud and boundary layer interactions over the Arctic sea ice in late summer |
title_full |
Cloud and boundary layer interactions over the Arctic sea ice in late summer |
title_fullStr |
Cloud and boundary layer interactions over the Arctic sea ice in late summer |
title_full_unstemmed |
Cloud and boundary layer interactions over the Arctic sea ice in late summer |
title_sort |
cloud and boundary layer interactions over the arctic sea ice in late summer |
publisher |
European Geosciences Union |
publishDate |
2013 |
url |
https://eprints.whiterose.ac.uk/77208/ https://eprints.whiterose.ac.uk/77208/10/Shupe_2013_acp-13-9379-2013-1_with_coversheet.pdf https://doi.org/10.5194/acp-13-9379-2013 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Basin Arctic ice pack Sea ice |
genre_facet |
Arctic Arctic Basin Arctic ice pack Sea ice |
op_relation |
https://eprints.whiterose.ac.uk/77208/10/Shupe_2013_acp-13-9379-2013-1_with_coversheet.pdf Shupe, MD, Persson, POG, Brooks, IM et al. (5 more authors) (2013) Cloud and boundary layer interactions over the Arctic sea ice in late summer. Atmospheric Chemistry and Physics, 13 (18). 9379 - 9400. ISSN 1680-7316 |
op_doi |
https://doi.org/10.5194/acp-13-9379-2013 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
13 |
container_issue |
18 |
container_start_page |
9379 |
op_container_end_page |
9399 |
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1800743821064011776 |