A33K-0349
An Idealized Sudden Straotspheric Warming Test Case
An Idealized Sudden Straotspheric Warming Test Case
Wednesday, 16 December 2015
Poster Hall (Moscone South)
Abstract:
The ability of General Circulation Models in simulating the stratospheric phenomenon is very important in long term extreme weather and climate forecast. The motivation for developing this test case is to evaluate the performance of dynamical cores, particularly in the stratospheric domain, in order to give guidance for future dynamical core development.In this study, we derived a balanced initial condition to serve this purpose. The balanced initial condition consists of an anti-symmetric temperature and wind profile about the equator, which mimics the ordinary winter time condition. This analytical initial condition allows us to test the stability and diffusivity of the dynamical cores.
In addition, we add moving mountains in the surface to generate planetary waves that are necessary in Sudden Stratospheric Warming generation mechanisms. Different mountain properties (including height, wavenumber, moving speed, etc.) are tested in this period and certain setups are selected. Further more, this test case is also implemented in the community dynamical core to validate its robustness.