Published October 4, 2019 | Version v1
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Data for Understanding the moisture variance in precipitating shallow cumulus convection

  • 1. Goethe University Frankfurt
  • 2. Deutscher Wetterdienst

Description

Data accompanying the paper titled: Understanding the moisture variance in precipitating shallow cumulus convection .

 

This repository contains configuration files and output statistics for three idealized simulations run with LES model MicroHH (van Heerwaarden et al., 2017). 


The experimental setup of all cases is based on the Rain in Cumulus over the Ocean (RICO) field experiment as used in the GEWEX Cloud System Study (GCSS) RICO model inter comparison study (Rauber et al., 2007; vanZanten et al, 2011). The experiment, defined as the standard case (referenced as STD), uses the GCSS configuration, while the second experiment, termed as the moist case (referenced as MST), is initialized with an increased moisture content in the cloud layer and above of about 2 g/kg. Both of these experiments cover a domain size of 50 x 50 x 6 km with an isotropic grid spacing of 25 m. The control simulation (referenced as CTRL) is a non-precipitating reference simulation. The setup for the control case is identical to the setup of the standard case, except for a smaller domain size of 8 x 8 x 6 km.

 

 

The files are organized in the following way: 

Each case has its own folder (CTRL, MST, and STD). 

Each such folder contains a 'setup' sub-folder with the configuration files for the microHH simulation: an '.ini' file and a '.py' file that generates initial conditions and forcings. 

Output statistics are located in the 'statistics_output' sub-folders. They contain '.nc' files with statistics from 30 h to 35 h of the simulation. Conditional spatial averaging was performed in order to understand the significance of the convective regions. Files valid for cloud active regions are marked with '_CA'.  Files valid for non active regions are marked with '_NA' (Bastak Duran, Geleyn, Vana, Schmidli, & Brozkova, 2018). Files without '_CA' or '_NA' are valid for the whole domain.

Files

UMV.zip

Files (1.2 GB)

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Additional details

References

  • Rauber, R. M., Stevens, B., III, H. T. O., Knight, C., Albrecht, B. A., Blyth, A. M., . . . Zuidema, P. (2007). Rain in shallow cumulus over the ocean: The RICO campaign. Bull. Amer. Meteor. Soc, 88, 1912-1928.
  • van Heerwaarden, C. C., van Stratum, B. J. H., Heus, T., Gibbs, J. A., Fedorovich, E., & Mellado, J. P. (2017). Microhh 1.0: a computational fluid dynamics code for direct numerical simulation and large-eddy simulation of atmospheric boundary layer flows. Geo. Model. dev., 1-33. doi:doi.org/10.5194/gmd-10-3145-2017
  • van Zanten et al, M. (2011). Controls on precipitation and cloudiness in simulations of trade-wind cumulus as observed during rico. J. Adv. Model. Earth Syst., 3, 19.
  • Bastak Duran, I., Geleyn, J.-F., Vana, F., Schmidli, J., & Brozkova, R. (2018). A turbulence scheme with two prognostic turbulence energies. J. Atmos. Sci., 75, 3381-3402. doi: 10.1175/JAS-D-18-0026.1