Modelling at grey-zone resolutions
Convection, clouds, and precipitation arise from complex interactions across multiple spatial scales. To better understand these processes in detail, high-resolution grids are now widely used in atmospheric modeling. However, changing grid spacing also affects the physical processes a model can represent; for instance, vertical fluxes of heat, moisture, and momentum are particularly sensitive to resolution changes. My research explores how precipitation and related processes are represented at different resolutions, specifically downscaling from large-scale models to the meso- and large-eddy scales.
Related Publications
Collier, E., N. Ban, N. Richter, B. Ahrens, D. Chen, X. Chen, H.-W. Lai, R. Leung, L. Li, A. Medvedova, T. Ou, P. K. Pothapakula, E. Potter, A. F. Prein, K. Sakaguchi, M. Schroeder, P. Singh, S. Sobolowski, S. Sugimoto, J. Tang, H. Yu and C. Ziska, 2024: The first ensemble of kilometer-scale simulations of a hydrological year over the third pole. Clim. Dyn., doi:10.1007/s00382-024-07291-2.
Lin, Q., J. Chen, T. Ou, H.-W. Lai, A. F. Prein, and D. Chen, 2023: Performance of the WRF model at the convection‐permitting scale in simulating snowfall and lake‐effect snow over the Tibetan Plateau. J. Geophys. Res. Atmos., 128(16), e2022JD038433, doi:10.1029/2022JD038433.
Ou, T., D. Chen, J. Tang, C. Lin, X. Wang, J. Kukulies, and H.-W. Lai, 2023: Wet bias of summer precipitation in the northwestern Tibetan Plateau in ERA5 is linked to overestimated lower-level southerly wind over the plateau. Clim. Dyn., 61, 2139-2153, doi:10.1007/s00382-023-06672-3.
Prein, A. F., N. Ban, T. Ou, J. Tang, K. Sakaguchi, E. Collier, S. Jayanarayanan, L. Li, S. Sobolowski, X. Chen, X. Zhou, H.-W. Lai, S. Sugimoto, L. Zou, S. Hasson, M. Ekstrom, P. K. Pothapakula, B. Ahrens, R. Stuart, H. C. Steen-Larsen, L. R. Leung, D. Belusic, J. Kukulies, J. Curio and D. Chen, 2022: Towards Ensemble-Based Kilometer-Scale Climate Simulations over the Third Pole Region. Clim Dyn, 60, 4055-4081, doi:10.1007/s00382-022-06543-3.
Ou, T., D. Chen, X. Chen, C. Lin, K. Yang, H.-W. Lai, and F. Zhang, 2020: Simulation of summer precipitation diurnal cycles over the Tibetan Plateau at the gray-zone grid spacing for cumulus parameterization. Clim. Dyn., 54, 3525–3539, doi:10.1007/s00382-020-05181-x.
Lai, H.-W., F. Zhang, E. E. Clothiaux, D. R. Stauffer, B. J. Gaudet, J. Verlinde, and D. Chen, 2020: Modeling Arctic Boundary Layer Cloud Streets at Grey-zone Resolutions. Adv. Atoms. Sci., 37(1), 42-56, doi:10.1007/s00376-019-9105-y.
He, J., F. Zhang, X. Chen, X. Bao, D. Chen, H. M. Kim, H.-W. Lai, L. R. Leung, X. Ma, Z. Meng, T. Ou, Z. Xiao, E.-G. Yang, and K. Yang, 2019: Development and evaluation of an ensemble-based data assimilation system for regional reanalysis over the Tibetan Plateau and surrounding regions. J. Adv. Model. Earth Syst., 11, 2503-2522, doi:10.1029/2019MS001665.