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  Impact of resolution and air temperature on Large Eddy Simulation of mid-latitude summer time convection. Under open review for Atmospheric Chemistry and Physics. doi: 10.5194/acp-2019-638

Moseley, C., Pscheidt, I., Cioni, G., & Heinze, R. (submitted). Impact of resolution and air temperature on Large Eddy Simulation of mid-latitude summer time convection. Under open review for Atmospheric Chemistry and Physics. doi: 10.5194/acp-2019-638.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-8662-6 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-8663-5
Genre: Journal Article

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 Creators:
Moseley, Christopher1, Author              
Pscheidt, Ieda, Author
Cioni, Guido2, Author              
Heinze, Rieke3, Author              
Affiliations:
1Wave Driven Circulations, The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society, ou_3001854              
2Hans Ertel Research Group Clouds and Convection, The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society, ou_913572              
3Precipitating Convection, The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society, ou_3001851              

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 Abstract: We analyze life cycles of summer time moist convection of a Large Eddy Simulation (LES) in a limited area setup over Germany. The goal is to assess the ability of the model to represent convective organization in space and time in comparison to radar data, and its sensitivity to daily mean surface air temperature. A continuous period of 36 days in May and June 2016, showing a considerable amount of convective rainfall which covers large parts of the domain on most of the days, is simulated with a grid spacing of 625 m. Using convective organization indices, and a tracking algorithm for convective precipitation events, we find that an LES with 625 m grid spacing tends to underestimate the degree of convective organization, and shows a weaker sensitivity of heavy convective rainfall to temperature as suggested by the radar data. An analysis of three days within this period that are simulated with finer grid spacing of 312 m and 156 m showed, that a grid spacing at the 100 m scale has the potential to improve the simulated diurnal cycles of convection, the mean time evolution of single convective events, and the degree of convective organization.

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Language(s): eng - English
 Dates: 2019-07
 Publication Status: Submitted
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.5194/acp-2019-638
 Degree: -

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Title: Atmospheric Chemistry and Physics
  Abbreviation : ACP
Source Genre: Journal
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Publ. Info: Göttingen : Copernicus Publications
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: ISSN: 1680-7316
CoNE: https://pure.mpg.de/cone/journals/resource/111030403014016