EGU21-9204
https://doi.org/10.5194/egusphere-egu21-9204
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

A semi-implicit pseudo-incompressible flow solver for diabatic dynamics: Baroclinic-wave life cycles 

Fabienne Schmid1, Rupert Klein2, Elena Gagarina1, and Ulrich Achatz1
Fabienne Schmid et al.
  • 1Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt/Main, Frankfurt/Main, Germany (schmid@iau.uni-frankfurt.de)
  • 2FB Mathematik und Informatik, Freie Universität Berlin, Berlin, Germany

This study introduces an efficient modeling framework for investigations of diabatic flows in the atmosphere. In particular, the spontaneous emission of inertia-gravity waves is addressed in idealized simulations of baroclinic-wave life cycles. Numerical simulations are perfomed using a finite-volume solver for the pseudo-incompressible equations on the f-plane with newly implemented semi-implicit time stepping scheme, adjusted to the staggered grid, which provides high stability and efficiency for long simulation runs with large domains. Furthermore, we have modified the entropy equation to include a heat source, allowing for a development of the vertically dependent reference atmosphere. Numerical experiments of several benchmarks are compared against an explicit third-order Runge-Kutta scheme as well as numerical models from the literature, verifying the accuracy and efficiency of the scheme. The proposed framework serves as a construction basis for an efficient simulation tool for the development and validation of a parameterization scheme for gravity-waves emitted from jets and fronts.

How to cite: Schmid, F., Klein, R., Gagarina, E., and Achatz, U.: A semi-implicit pseudo-incompressible flow solver for diabatic dynamics: Baroclinic-wave life cycles , EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-9204, https://doi.org/10.5194/egusphere-egu21-9204, 2021.

Corresponding formerly uploaded have been withdrawn.