EVOLUTION OF A STORM-DRIVEN CLOUDY BOUNDARY LAYER IN THE ARCTIC
Abstract. To investigate the processes of development and maintenance of low-level clouds during major synoptic events, the cloudy boundary layer under stormy conditions during the summertime Arctic has been studied using observations from the Surface Heat Budget of the Arctic Ocean (SHEBA) experime...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.692.2122 2023-05-15T14:51:58+02:00 EVOLUTION OF A STORM-DRIVEN CLOUDY BOUNDARY LAYER IN THE ARCTIC Jun Inoue Judith A. Curry The Pennsylvania State University CiteSeerX Archives 2004 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.692.2122 http://curry.eas.gatech.edu/currydoc/Inoue_BLM117.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.692.2122 http://curry.eas.gatech.edu/currydoc/Inoue_BLM117.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://curry.eas.gatech.edu/currydoc/Inoue_BLM117.pdf Radiative cooling Shear mixing SHEBA Storm-driven boundary layer text 2004 ftciteseerx 2016-01-08T18:27:18Z Abstract. To investigate the processes of development and maintenance of low-level clouds during major synoptic events, the cloudy boundary layer under stormy conditions during the summertime Arctic has been studied using observations from the Surface Heat Budget of the Arctic Ocean (SHEBA) experiment and large-eddy simulations (LES). On 29 July 1998, a stable Arctic cloudy boundary-layer event was observed after the passage of a synoptic low pressure system. The local dynamic and thermodynamic structure of the boundary layer was determined from aircraft measurements including the analysis of turbulence, cloud micro-physics and radiative properties. After the upper cloud layer advected over the existing cloud layer, the turbulent kinetic energy (TKE) budget indicated that the cloud layer below 200m was maintained predominantly by shear production. Observations of longwave radiation showed that cloud-top cooling at the lower cloud top has been suppressed by radiative effects of the upper cloud layer. Our LES results demonstrate the importance of the combination of shear mixing near the surface and radiative cooling at the cloud top in the storm-driven cloudy boundary layer. Once the low-level cloud reaches a certain height, depending on the amount of cloud-top cooling, the two sources of TKE production begin to separate in space under continuous stormy conditions, suggesting one possible mechanism for the cloud layering. The sensitivity tests suggest that the storm-driven cloudy boundary layer is possibly switched to the shear-driven system due to the advection of upper clouds or to the buoyantly driven system due to the lack of wind shear. A comparison is made of this storm-driven boundary layer with the buoyantly driven boundary layer previously described in the literature. Text Arctic Arctic Ocean Surface Heat Budget of the Arctic Ocean Unknown Arctic Arctic Ocean |
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English |
topic |
Radiative cooling Shear mixing SHEBA Storm-driven boundary layer |
spellingShingle |
Radiative cooling Shear mixing SHEBA Storm-driven boundary layer Jun Inoue Judith A. Curry EVOLUTION OF A STORM-DRIVEN CLOUDY BOUNDARY LAYER IN THE ARCTIC |
topic_facet |
Radiative cooling Shear mixing SHEBA Storm-driven boundary layer |
description |
Abstract. To investigate the processes of development and maintenance of low-level clouds during major synoptic events, the cloudy boundary layer under stormy conditions during the summertime Arctic has been studied using observations from the Surface Heat Budget of the Arctic Ocean (SHEBA) experiment and large-eddy simulations (LES). On 29 July 1998, a stable Arctic cloudy boundary-layer event was observed after the passage of a synoptic low pressure system. The local dynamic and thermodynamic structure of the boundary layer was determined from aircraft measurements including the analysis of turbulence, cloud micro-physics and radiative properties. After the upper cloud layer advected over the existing cloud layer, the turbulent kinetic energy (TKE) budget indicated that the cloud layer below 200m was maintained predominantly by shear production. Observations of longwave radiation showed that cloud-top cooling at the lower cloud top has been suppressed by radiative effects of the upper cloud layer. Our LES results demonstrate the importance of the combination of shear mixing near the surface and radiative cooling at the cloud top in the storm-driven cloudy boundary layer. Once the low-level cloud reaches a certain height, depending on the amount of cloud-top cooling, the two sources of TKE production begin to separate in space under continuous stormy conditions, suggesting one possible mechanism for the cloud layering. The sensitivity tests suggest that the storm-driven cloudy boundary layer is possibly switched to the shear-driven system due to the advection of upper clouds or to the buoyantly driven system due to the lack of wind shear. A comparison is made of this storm-driven boundary layer with the buoyantly driven boundary layer previously described in the literature. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Jun Inoue Judith A. Curry |
author_facet |
Jun Inoue Judith A. Curry |
author_sort |
Jun Inoue |
title |
EVOLUTION OF A STORM-DRIVEN CLOUDY BOUNDARY LAYER IN THE ARCTIC |
title_short |
EVOLUTION OF A STORM-DRIVEN CLOUDY BOUNDARY LAYER IN THE ARCTIC |
title_full |
EVOLUTION OF A STORM-DRIVEN CLOUDY BOUNDARY LAYER IN THE ARCTIC |
title_fullStr |
EVOLUTION OF A STORM-DRIVEN CLOUDY BOUNDARY LAYER IN THE ARCTIC |
title_full_unstemmed |
EVOLUTION OF A STORM-DRIVEN CLOUDY BOUNDARY LAYER IN THE ARCTIC |
title_sort |
evolution of a storm-driven cloudy boundary layer in the arctic |
publishDate |
2004 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.692.2122 http://curry.eas.gatech.edu/currydoc/Inoue_BLM117.pdf |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Surface Heat Budget of the Arctic Ocean |
genre_facet |
Arctic Arctic Ocean Surface Heat Budget of the Arctic Ocean |
op_source |
http://curry.eas.gatech.edu/currydoc/Inoue_BLM117.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.692.2122 http://curry.eas.gatech.edu/currydoc/Inoue_BLM117.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766323103399411712 |