The turbulent state of Arctic mixed-phase clouds under different conditions of aerosols and ice water content ...
<!--!introduction!--> During wintertime, the main source of energy to the Arctic comes through moist intrusions. The air mass cools radiatively during transport, promoting the formation of low-level mixed-phase clouds (MPCs). Previous studies have shown that the MPCs that form can exist in eit...
| Main Authors: | , , |
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| Format: | Conference Object |
| Language: | unknown |
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GFZ German Research Centre for Geosciences
2023
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| Online Access: | https://dx.doi.org/10.57757/iugg23-2247 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018517 |
| Summary: | <!--!introduction!--> During wintertime, the main source of energy to the Arctic comes through moist intrusions. The air mass cools radiatively during transport, promoting the formation of low-level mixed-phase clouds (MPCs). Previous studies have shown that the MPCs that form can exist in either a stable (stratus) or a convective (stratocumulus) state. In this study, we examine the processes and conditions that promote a transition between the two states through idealized simulations using a three-dimensional large-eddy simulation model coupled with a one-dimensional multilayer sea ice model. We find that the availability and properties of aerosols as well as the cloud ice content can delay or even prevent stratocumulus formation. If no suitable cloud condensation nuclei are available at the base of the cloud at the time of the transition, then no new droplets form, the buoyancy remains low and the cloud remains in its stable state. Furthermore, a lower cloud ice water content results in a more stably ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ... |
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