Spatial organisation affects the pathway to precipitation in simulated trade-wind convection
We investigate whether and how spatial organisation affects the pathway to precipitation in large-domain large-eddy simulations of the North Atlantic trades. We decompose the formation of surface precipitation (P) in warm shallow trade cumulus into a production phase, where cloud condensate is conve...
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2023
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Online Access: | http://dx.doi.org/10.22541/essoar.167979635.58663858/v2 |
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crwinnower:10.22541/essoar.167979635.58663858/v2 2024-06-02T08:11:21+00:00 Spatial organisation affects the pathway to precipitation in simulated trade-wind convection Radtke, Jule Vogel, Raphaela Ament, Felix Naumann, Ann Kristin 2023 http://dx.doi.org/10.22541/essoar.167979635.58663858/v2 unknown Authorea, Inc. posted-content 2023 crwinnower https://doi.org/10.22541/essoar.167979635.58663858/v2 2024-05-07T14:19:20Z We investigate whether and how spatial organisation affects the pathway to precipitation in large-domain large-eddy simulations of the North Atlantic trades. We decompose the formation of surface precipitation (P) in warm shallow trade cumulus into a production phase, where cloud condensate is converted into rain, and a sedimentation phase, where rain falls towards the ground while some of it evaporates. With strengthened organisation, rain forms in weaker updrafts from smaller cloud droplets so that cloud condensate is less efficiently converted into rain. At the same time, organisation creates a locally moister environment and modulates the microphysical conversion processes that determine the raindrops’ size. This reduces evaporation and more of the produced rain reaches the ground. Organisation thus affects how the two phases contribute to P, but only weakly affects the total precipitation efficiency. We conclude that the pathway to precipitation differs with organisation and suggest that organisation buffers rain development. Other/Unknown Material North Atlantic The Winnower |
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Open Polar |
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The Winnower |
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crwinnower |
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unknown |
description |
We investigate whether and how spatial organisation affects the pathway to precipitation in large-domain large-eddy simulations of the North Atlantic trades. We decompose the formation of surface precipitation (P) in warm shallow trade cumulus into a production phase, where cloud condensate is converted into rain, and a sedimentation phase, where rain falls towards the ground while some of it evaporates. With strengthened organisation, rain forms in weaker updrafts from smaller cloud droplets so that cloud condensate is less efficiently converted into rain. At the same time, organisation creates a locally moister environment and modulates the microphysical conversion processes that determine the raindrops’ size. This reduces evaporation and more of the produced rain reaches the ground. Organisation thus affects how the two phases contribute to P, but only weakly affects the total precipitation efficiency. We conclude that the pathway to precipitation differs with organisation and suggest that organisation buffers rain development. |
format |
Other/Unknown Material |
author |
Radtke, Jule Vogel, Raphaela Ament, Felix Naumann, Ann Kristin |
spellingShingle |
Radtke, Jule Vogel, Raphaela Ament, Felix Naumann, Ann Kristin Spatial organisation affects the pathway to precipitation in simulated trade-wind convection |
author_facet |
Radtke, Jule Vogel, Raphaela Ament, Felix Naumann, Ann Kristin |
author_sort |
Radtke, Jule |
title |
Spatial organisation affects the pathway to precipitation in simulated trade-wind convection |
title_short |
Spatial organisation affects the pathway to precipitation in simulated trade-wind convection |
title_full |
Spatial organisation affects the pathway to precipitation in simulated trade-wind convection |
title_fullStr |
Spatial organisation affects the pathway to precipitation in simulated trade-wind convection |
title_full_unstemmed |
Spatial organisation affects the pathway to precipitation in simulated trade-wind convection |
title_sort |
spatial organisation affects the pathway to precipitation in simulated trade-wind convection |
publisher |
Authorea, Inc. |
publishDate |
2023 |
url |
http://dx.doi.org/10.22541/essoar.167979635.58663858/v2 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_doi |
https://doi.org/10.22541/essoar.167979635.58663858/v2 |
_version_ |
1800757467356856320 |