The turbulent structure of the Arctic summer boundary layer during the Arctic Summer Cloud-Ocean Study
The mostly ice covered Arctic Ocean is dominated by low-level liquid- or mixed-phase clouds. Turbulence within stratocumulus is primarily driven by cloud top cooling that induces convective instability. Using a suite of in situ and remote sensing instruments we characterize turbulent mixing in Arcti...
Published in: | Journal of Geophysical Research: Atmospheres |
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ftpubman:oai:pure.mpg.de:item_2491757 2023-08-20T04:03:35+02:00 The turbulent structure of the Arctic summer boundary layer during the Arctic Summer Cloud-Ocean Study Brooks, I. Tjernström, M. Persson, P. Shupe, M. Atkinson, R. Canut, G. Birch, C. Mauritsen, T. Sedlar, J. Brooks, B. 2017-09-27 application/pdf http://hdl.handle.net/11858/00-001M-0000-002E-1038-6 http://hdl.handle.net/11858/00-001M-0000-002E-105D-3 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1002/2017JD027234 http://hdl.handle.net/11858/00-001M-0000-002E-1038-6 http://hdl.handle.net/11858/00-001M-0000-002E-105D-3 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/3.0/ Journal of Geophysical Research: Atmospheres info:eu-repo/semantics/article 2017 ftpubman https://doi.org/10.1002/2017JD027234 2023-08-01T21:59:52Z The mostly ice covered Arctic Ocean is dominated by low-level liquid- or mixed-phase clouds. Turbulence within stratocumulus is primarily driven by cloud top cooling that induces convective instability. Using a suite of in situ and remote sensing instruments we characterize turbulent mixing in Arctic stratocumulus, and for the first time we estimate profiles of the gradient Richardson number at relatively high resolution in both time (10 min) and altitude (10 m). It is found that the mixing occurs both within the cloud, as expected, and by wind shear instability near the surface. About 75 of the time these two layers are separated by a stably stratified inversion at 100–200 m altitude. Exceptions are associated with low cloud bases that allow the cloud-driven turbulence to reach the surface. The results imply that turbulent coupling between the surface and the cloud is sporadic or intermittent. ©2017. The Authors. Article in Journal/Newspaper Arctic Arctic Ocean Max Planck Society: MPG.PuRe Arctic Arctic Ocean Journal of Geophysical Research: Atmospheres 122 18 9685 9704 |
institution |
Open Polar |
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Max Planck Society: MPG.PuRe |
op_collection_id |
ftpubman |
language |
English |
description |
The mostly ice covered Arctic Ocean is dominated by low-level liquid- or mixed-phase clouds. Turbulence within stratocumulus is primarily driven by cloud top cooling that induces convective instability. Using a suite of in situ and remote sensing instruments we characterize turbulent mixing in Arctic stratocumulus, and for the first time we estimate profiles of the gradient Richardson number at relatively high resolution in both time (10 min) and altitude (10 m). It is found that the mixing occurs both within the cloud, as expected, and by wind shear instability near the surface. About 75 of the time these two layers are separated by a stably stratified inversion at 100–200 m altitude. Exceptions are associated with low cloud bases that allow the cloud-driven turbulence to reach the surface. The results imply that turbulent coupling between the surface and the cloud is sporadic or intermittent. ©2017. The Authors. |
format |
Article in Journal/Newspaper |
author |
Brooks, I. Tjernström, M. Persson, P. Shupe, M. Atkinson, R. Canut, G. Birch, C. Mauritsen, T. Sedlar, J. Brooks, B. |
spellingShingle |
Brooks, I. Tjernström, M. Persson, P. Shupe, M. Atkinson, R. Canut, G. Birch, C. Mauritsen, T. Sedlar, J. Brooks, B. The turbulent structure of the Arctic summer boundary layer during the Arctic Summer Cloud-Ocean Study |
author_facet |
Brooks, I. Tjernström, M. Persson, P. Shupe, M. Atkinson, R. Canut, G. Birch, C. Mauritsen, T. Sedlar, J. Brooks, B. |
author_sort |
Brooks, I. |
title |
The turbulent structure of the Arctic summer boundary layer during the Arctic Summer Cloud-Ocean Study |
title_short |
The turbulent structure of the Arctic summer boundary layer during the Arctic Summer Cloud-Ocean Study |
title_full |
The turbulent structure of the Arctic summer boundary layer during the Arctic Summer Cloud-Ocean Study |
title_fullStr |
The turbulent structure of the Arctic summer boundary layer during the Arctic Summer Cloud-Ocean Study |
title_full_unstemmed |
The turbulent structure of the Arctic summer boundary layer during the Arctic Summer Cloud-Ocean Study |
title_sort |
turbulent structure of the arctic summer boundary layer during the arctic summer cloud-ocean study |
publishDate |
2017 |
url |
http://hdl.handle.net/11858/00-001M-0000-002E-1038-6 http://hdl.handle.net/11858/00-001M-0000-002E-105D-3 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean |
genre_facet |
Arctic Arctic Ocean |
op_source |
Journal of Geophysical Research: Atmospheres |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/2017JD027234 http://hdl.handle.net/11858/00-001M-0000-002E-1038-6 http://hdl.handle.net/11858/00-001M-0000-002E-105D-3 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/3.0/ |
op_doi |
https://doi.org/10.1002/2017JD027234 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
122 |
container_issue |
18 |
container_start_page |
9685 |
op_container_end_page |
9704 |
_version_ |
1774714002497077248 |