Observed impact of meso-scale vertical motion on cloudiness
We use estimates of mesoscale vertical velocity and collocated cloud measurements from the second Next-Generation Aircraft Remote Sensing for Validation campaign (NARVAL2) in the tropical North Atlantic to show theobserved impact of mesoscale vertical motion on tropical clouds. Our results not only...
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ftpubman:oai:pure.mpg.de:item_3271016 2024-09-09T19:56:56+00:00 Observed impact of meso-scale vertical motion on cloudiness George , G. Stevens, B. Bony, S. Klingebiel, M. Vogel, R. 2021-08-01 application/pdf http://hdl.handle.net/21.11116/0000-0007-8DE3-A http://hdl.handle.net/21.11116/0000-0007-8DE7-6 http://hdl.handle.net/21.11116/0000-0008-E578-F eng eng info:eu-repo/semantics/altIdentifier/doi/10.1175/JAS-D-20-0335.1 http://hdl.handle.net/21.11116/0000-0007-8DE3-A http://hdl.handle.net/21.11116/0000-0007-8DE7-6 http://hdl.handle.net/21.11116/0000-0008-E578-F info:eu-repo/semantics/openAccess Journal of the Atmospheric Sciences info:eu-repo/semantics/article 2021 ftpubman https://doi.org/10.1175/JAS-D-20-0335.1 2024-06-18T14:12:31Z We use estimates of mesoscale vertical velocity and collocated cloud measurements from the second Next-Generation Aircraft Remote Sensing for Validation campaign (NARVAL2) in the tropical North Atlantic to show theobserved impact of mesoscale vertical motion on tropical clouds. Our results not only confirm previously untestedhypotheses about the role of dynamics being nonnegligible in determining cloudiness, but go further to show that at themesoscale, the dynamics has a more dominant control on cloudiness variability than thermodynamics. A simple mass-flux estimate reveals that mesoscale vertical velocity at the subcloud-layer top explains much of the variations in peakshallow cumulus cloud fraction. In contrast, we find that thermodynamic cloud-controlling factors, such as humidity andstability, are unable to explain the variations in cloudiness at the mesoscale. Thus, capturing the observed variability ofcloudiness may require not only a consideration of thermodynamic factors, but also dynamic ones such as the mesoscalevertical velocity. Article in Journal/Newspaper North Atlantic Max Planck Society: MPG.PuRe Journal of the Atmospheric Sciences |
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Open Polar |
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Max Planck Society: MPG.PuRe |
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ftpubman |
language |
English |
description |
We use estimates of mesoscale vertical velocity and collocated cloud measurements from the second Next-Generation Aircraft Remote Sensing for Validation campaign (NARVAL2) in the tropical North Atlantic to show theobserved impact of mesoscale vertical motion on tropical clouds. Our results not only confirm previously untestedhypotheses about the role of dynamics being nonnegligible in determining cloudiness, but go further to show that at themesoscale, the dynamics has a more dominant control on cloudiness variability than thermodynamics. A simple mass-flux estimate reveals that mesoscale vertical velocity at the subcloud-layer top explains much of the variations in peakshallow cumulus cloud fraction. In contrast, we find that thermodynamic cloud-controlling factors, such as humidity andstability, are unable to explain the variations in cloudiness at the mesoscale. Thus, capturing the observed variability ofcloudiness may require not only a consideration of thermodynamic factors, but also dynamic ones such as the mesoscalevertical velocity. |
format |
Article in Journal/Newspaper |
author |
George , G. Stevens, B. Bony, S. Klingebiel, M. Vogel, R. |
spellingShingle |
George , G. Stevens, B. Bony, S. Klingebiel, M. Vogel, R. Observed impact of meso-scale vertical motion on cloudiness |
author_facet |
George , G. Stevens, B. Bony, S. Klingebiel, M. Vogel, R. |
author_sort |
George , G. |
title |
Observed impact of meso-scale vertical motion on cloudiness |
title_short |
Observed impact of meso-scale vertical motion on cloudiness |
title_full |
Observed impact of meso-scale vertical motion on cloudiness |
title_fullStr |
Observed impact of meso-scale vertical motion on cloudiness |
title_full_unstemmed |
Observed impact of meso-scale vertical motion on cloudiness |
title_sort |
observed impact of meso-scale vertical motion on cloudiness |
publishDate |
2021 |
url |
http://hdl.handle.net/21.11116/0000-0007-8DE3-A http://hdl.handle.net/21.11116/0000-0007-8DE7-6 http://hdl.handle.net/21.11116/0000-0008-E578-F |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Journal of the Atmospheric Sciences |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1175/JAS-D-20-0335.1 http://hdl.handle.net/21.11116/0000-0007-8DE3-A http://hdl.handle.net/21.11116/0000-0007-8DE7-6 http://hdl.handle.net/21.11116/0000-0008-E578-F |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1175/JAS-D-20-0335.1 |
container_title |
Journal of the Atmospheric Sciences |
_version_ |
1809927800044388352 |