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arcticclouds [2023/07/12 17:53] – [Mixed-phase clouds in transforming air masses] updating paper chylikarcticclouds [2023/07/12 17:57] – [Cold air outbreaks] adding internal links chylik
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 Cold air outbreaks (CAOs) in the Arctic are situations in which a low level mass of cold air initially situated over the sea ice is advected across the ice edge and continues over open water. This process is accompanied by the formation of a convective boundary layer that deepens rapidly, featuring strong surface heat fluxes as well as the formation of low-level mixed-phase clouds. The dynamics in the CAO boundary layer are often complex, as illustrated in Fig. 2. Often these clouds are organized into streets, which at some point downstream of the ice edge tend to break up into bigger individual cells. These cells, often arranged into a spoke-pattern, can appear as either open cells (with a cloud free center) or as closed cells. Recent research has suggested that microphysical processes play an important role in determining the eventual cloudiness in the cell centers. Cold air outbreaks (CAOs) in the Arctic are situations in which a low level mass of cold air initially situated over the sea ice is advected across the ice edge and continues over open water. This process is accompanied by the formation of a convective boundary layer that deepens rapidly, featuring strong surface heat fluxes as well as the formation of low-level mixed-phase clouds. The dynamics in the CAO boundary layer are often complex, as illustrated in Fig. 2. Often these clouds are organized into streets, which at some point downstream of the ice edge tend to break up into bigger individual cells. These cells, often arranged into a spoke-pattern, can appear as either open cells (with a cloud free center) or as closed cells. Recent research has suggested that microphysical processes play an important role in determining the eventual cloudiness in the cell centers.
  
-In the recent ACLOUD field campaign in May 2017, which is part of the ongoing (AC)<sup>3</sup> project, some cold air outbreaks where sampled in the Fram Strait west of the Svalbard group of islands. At InScAPE we are currently performing fine-scale model simulations of these CAO cases, making use of ACLOUD measurements to assess their realism.+In the recent ACLOUD field campaign in May 2017, which is part of the ongoing (AC)<sup>3</sup> project, some cold air outbreaks where sampled in the Fram Strait west of the Svalbard group of islands. At InScAPE we are currently performing [[models#dales|fine-scale model]] simulations of these CAO cases, making use of measurements from field campaigns such as [[narvalsimulations#mosaic|ACLOUD and MOSAiC]] to assess their realism.
  
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arcticclouds.txt · Last modified: 2024/01/26 19:20 by chylik