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--- models [2018/09/07 10:35] – [Single Column Modeling on microgrids] neggers
+++ models [2023/07/12 18:00] (current) – [DALES] modiftying text of links chylik
@@ Line 9: / Line 9: @@
 The Dutch Atmospheric Large-Eddy Simulation [[https://github.com/dalesteam/dales|(DALES)]] model is one of the two large eddy simulations (LES) codes employed at InScAPE. A library of prototype cases is used for research and for further code development, including convective cases as well as cases of stratiform clouds. Many of these have been developed within the context of international model intercomparison projects, such as the GCSS boundary layer cloud working group. The library of cases also includes realistic cases at our [[testbed|Testbed]] locations that are based on a blend of observations and analyses obtained from weather forecast models. The testbed part of our case library spans multiple years at multiple locations of interest.
-The current version of DALES ((Heus et al. (2010). //Formulation of the Dutch Atmospheric Large-Eddy Simulation (DALES) and overview of its applications//. Geoscientific model development 3, (2), pp.415-444. ''doi: 10.5194/gmd-3-415-2010'')) does not incliude a mixed-phase microphysics scheme. To this purpose we are currently working on implementing a full 3-phase microphysics scheme of Seifert-Beheng ((Seifert, A. and Beheng, K. D. (2001) //A double-moment parameterization for simulating autoconversion, accretion and selfcollection//. At-mos. Res., 59, pp. 265–281. ''doi:10.1016/S0169-8095(01)00126-0'')). This code developmen work is supported by the (AC)<sup>3</sup> project.
+The current main version of DALES ((Heus et al. (2010). //Formulation of the Dutch Atmospheric Large-Eddy Simulation (DALES) and overview of its applications//. Geoscientific model development 3, (2), pp.415-444. ''doi: 10.5194/gmd-3-415-2010'')) does not include a mixed-phase microphysics scheme. To this purpose we have implemented a full 3-phase microphysics scheme of Seifert-Beheng ((Seifert, A. and Beheng, K. D. (2001) //A double-moment parameterization for simulating autoconversion, accretion and selfcollection//. At-mos. Res., 59, pp. 265–281. ''doi:10.1016/S0169-8095(01)00126-0'')). Apart from the full 2-moment scheme, our implementation also offers following options:
+  * prognostic treatment of cloud condensation nuclei
+  * starting with cloud ice profiles based on observations
+  * advection of cloud ice crystals
+This code development work has been supported by the (AC)<sup>3</sup> project. Our enhanced version of DALES ([[https://github.com/jchylik/dales/tree/to4.3_Fredrik_sb3cgn|see GitHub page]]) has been used for high-resolution simulations of [[arcticclouds|Arctic clouds]] observed during field campaigns [[http://www.ac3-tr.de/news/acloud-campaign/|ACLOUD]], PASCAL ((Neggers er al. (2019). // Local and remote controls on Arctic mixed-layer evolution//. Journal of Advances in Modeling Earth Systems.  ''doi:10.1029/2019MS001671'')), and [[https://mosaic-expedition.org/|MOSAiC]]. We have also taken part in some model intercomparison studies ((Roode et al. (2019) A large eddy model intercomparison study of the CONSTRAIN cold air outbreak case, Journal of Advances in Modeling Earth Systems, 11, pp.597-623. ''doi:10.1029/2018MS001443''))
+{{ :wiki:plot1_jan_profiles_q_ci_c_tot_ncc60_g.png?nolink&400 | the model of developing cloud layer on 18 April over Fram Strait }}
 Another activity is to implement the ED(MF)<sup>n</sup> scheme for moist convective transport and clouds into DALES, as a new subgrid scheme option. The purpose of this activity is to allow using DALES as a simplified circulation model that maintains non-hydrostaticity, in order to perform scientific research on parameterizing convection in the boundary layer grey zone. More information about this research effort is provided on the [[edmf|EDMF]] documentation page.
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 === Regional LES and Global climate simulation ===
-We use the ICON (Icosahedral non-hydrostatic) model in two different version - the LES version ICON-LEM developed during the [[http://www.hdcp2.eu|HDCP2]] project and the general circulation model developed by the Max-Planck-Insitute for Meteorology ([[http://www.mpimet.mpg.de|MPI]]) and the Germany Weather Service ([[http://www.dwd.de|DWD]]).
+We use the [[https://code.mpimet.mpg.de/projects/iconpublic|ICON]] (Icosahedral non-hydrostatic) model in two different version - the LES version ICON-LEM developed during the [[http://www.hdcp2.eu|HDCP2]] project and the general circulation model developed by the Max-Planck-Insitute for Meteorology ([[http://www.mpimet.mpg.de|MPI]]) and the Germany Weather Service ([[http://www.dwd.de|DWD]]).
 Apart from its innovative triangular grid, ICON has several advantages over existing models; in particular the combination of a non-hydrostatic core with the option of heterogeneous forcing and non-periodic boundaries creates ideal opportunities for research of scale-adaptive parameterizations. The setup allows to simulate various synoptic situations at different places and a reasonable comparison to observational data - with this the testbed-situations for parameterization development is growing and getting more variable.
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 //Figure 1. An impression on the ICON-LEM simulations around the Ny Ålesund meteorological site on Spitsbergen performed by the InScAPE group. The left panels shows the set of nested simulations, while the right panel shows a visualization of clouds and the included topography.//
-The general circulation model version is used for developing and testing parameterizations. At the moment our focus is on the development and implementation of a PDF cloud scheme. For more information on our development of the PDF cloud scheme, see [[cloudscheme|here]]; more information about the GCM version of ICON can be found at the MPI website ([[https://mpimet.mpg.de/en/science/models/icon/|ICON]]).
+The general circulation model version is used for developing and testing parameterizations. At the moment our focus is on the development and implementation of a PDF cloud scheme. For more information on our development of the PDF cloud scheme, see [[cloudscheme|here]]; more information about the GCM version of ICON can be found at the MPI website ([[https://mpimet.mpg.de/en/science/modeling-with-icon/icon-configurations|ICON]]).
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 The LES infrastructure lends itself perfectly for SCM on microgrids, as i) it already has a fully non-hydrostatic dynamical core, and ii) it can easily be run on small grids. An additional advantage in this respect is that the LES is a lot simpler in its setup compared to a GCM, which can enhance the transparency of any numerical experiments, making them easier to understand. The LES thus effectively becomes a non-hydrostatic playground for the development of scale-aware and scale-adaptive convective parameterizations. The only requirement is to implement the physics package from a GCM into an LES as a subgrid scheme.
-The SCM-on-microgrids approach for developing scale-adaptive convective parameterization has recently been pioneered by InScAPE, by implementing a scale-adaptive version of EDMF based on cloud size distributions into the DALES code ([[https://doi.org/10.1175/JAS-D-17-0231.1|Brast et al, JAMES, 2018]]. The results are so promising that we have adopted it as one of our main research tools. A showcase with results with DALES-ED(MF)^n for a selection of prototype cumulus cases can be found [[edmf|here]]
+The SCM-on-microgrids approach for developing scale-adaptive convective parameterization has recently been pioneered by InScAPE, by implementing a multi-plume scale-adaptive version of the ED(MF)<sup>n</sup> convection scheme based on cloud size distributions into the DALES code ([[https://doi.org/10.1175/JAS-D-17-0231.1|Brast et al, JAMES, 2018]]. The results are so promising that we have adopted it as one of our main research tools. A showcase with results with DALES-ED(MF)<sup>n</sup> for a selection of prototype cumulus cases can be found [[edmf|here]]