431 citations · 488 across the 10 of their papers we have counts for
10 papers
A Constrained Spectral Approximation of Subgrid-Scale Orography on Unstructured Grids
Ray Chew, Stamen Dolaptchiev, Maja-Sophie Wedel +1
The representation of subgrid-scale orography is a challenge in the physical parameterization of orographic gravity-wave sources in weather forecasting. A significant hurdle is enc…
The transient IDEMIX model as a nonorographic gravity wave parameterization in an atmospheric circulation model
B. Quinn, C. Eden, D. Olbers +2
The Internal wave Dissipation, Energy and Mixing (IDEMIX) model presents a novel way of parameterizing internal gravity waves in the atmosphere. Using a continuous full wave spectr…
Multi-Scale Dynamics of the Interaction Between Waves and Mean Flows: From Nonlinear WKB Theory to Gravity-Wave Parameterizations in Weather and Climate Models
Ulrich Achatz, Young-Ha Kim, Georg Sebastian Voelker
The interaction between small-scale waves and a larger-scale flow can be described by a multi-scale theory that forms the basis for a new class of parameterizations of subgrid-scal…
Crucial Role of Obliquely Propagating Gravity Waves in the Quasi-Biennial Oscillation Dynamics
Young-Ha Kim, Georg S. Voelker, Gergely Bölöni +2
In climate modelling, the reality of simulated flows in the middle atmosphere is largely affected by the model's representation of gravity wave processes that are unresolved, while…
MS-GWaM: A 3-dimensional transient gravity wave parametrization for atmospheric models
Georg S. Voelker, Gergely Bölöni, Young-Ha Kim +2
Parametrizations for internal gravity waves in atmospheric models are traditionally subject to a number of simplifications. Most notably, they rely on both neglecting wave propagat…
Interactions between gravity waves and cirrus clouds: asymptotic modeling of wave induced ice nucleation
Stamen I. Dolaptchiev, Peter Spichtinger, Manuel Baumgartner +1
We present an asymptotic approach for the systematic investigation of the effect of gravity waves (GW) on ice clouds formed through homogeneous nucleation. In particular, we consid…
Stochastic subgrid-scale parameterization for one-dimensional shallow water dynamics using stochastic mode reduction
Matthias Zacharuk, Stamen I. Dolaptchiev, Ulrich Achatz +1
We address the question of parameterizing the subgrid scales in simulations of geophysical flows by applying stochastic mode reduction to the one-dimensional stochastically forced…
Parametrization of stochastic multiscale triads
Jeroen Wouters, Stamen I. Dolaptchiev, Valerio Lucarini +1
We discuss applications of a recently developed method for model reduction based on linear response theory of weakly coupled dynamical systems. We apply the weak coupling method to…
Stochastic Parameterization: Towards a new view of Weather and Climate Models
Judith Berner, Ulrich Achatz, Lauriane Batte +23
The last decade has seen the success of stochastic parameterizations in short-term, medium-range and seasonal forecasts: operational weather centers now routinely use stochastic pa…
Benchmarking in a rotating annulus: a comparative experimental and numerical study of baroclinic wave dynamics
Miklos Vincze, Sebastian Borchert, Ulrich Achatz +11
The differentially heated rotating annulus is a widely studied tabletop-size laboratory model of the general mid-latitude atmospheric circulation. The two most relevant factors of…