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Research interests
Mesoscale phenomena in the troposphere generally have an immediate connection to heat, moisture and momentum fluxes at the earth’s surface. I have concentrated on mesoscale topographic disturbances and moist convection, especially the extreme cases that significantly alter the larger environment.
For example, in the first category, I have looked at blocking by anisotropic terrain, especially in a baroclinic atmosphere . In the second category, I have studied self-organizing convection such as squall lines and tropical cyclones. Permanent alteration of the larger environment is a big complication for numerical modeling, because it requires resolving many scales of motion simultaneously.
At larger time and space scales, I have studied the lifecycles of unstable baroclinic waves in order to understand the equilibration process at different zonal scales and subject to different physical processes.
I have experimented with a new approach to parameterizing mountain-wave drag in large-scale numerical models. The procedure is based on the theory of linear, stationary waves but includes a nonlinear component. The effect of background rotation and any alteration of the wave environment must be resolved by the model.
I have helped develop a compressible, nonhydrostatic, regional atmospheric model within GFDL’s Flexible Modeling System. The model has been used extensively for tropical-cyclone research, both at the basin scale and in smaller-scale idealized configurations. It has also been used to identify problems with coupling to a land-surface model. Going forward, the regional model will provide context for the transition to a unified dynamical core for global and regional modeling.
Mesoscale phenomena in the troposphere generally have an immediate connection to heat, moisture and momentum fluxes at the earth’s surface. I have concentrated on mesoscale topographic disturbances and moist convection, especially the extreme cases that significantly alter the larger environment.
For example, in the first category, I have looked at blocking by anisotropic terrain, especially in a baroclinic atmosphere . In the second category, I have studied self-organizing convection such as squall lines and tropical cyclones. Permanent alteration of the larger environment is a big complication for numerical modeling, because it requires resolving many scales of motion simultaneously.
At larger time and space scales, I have studied the lifecycles of unstable baroclinic waves in order to understand the equilibration process at different zonal scales and subject to different physical processes.
I have experimented with a new approach to parameterizing mountain-wave drag in large-scale numerical models. The procedure is based on the theory of linear, stationary waves but includes a nonlinear component. The effect of background rotation and any alteration of the wave environment must be resolved by the model.
I have helped develop a compressible, nonhydrostatic, regional atmospheric model within GFDL’s Flexible Modeling System. The model has been used extensively for tropical-cyclone research, both at the basin scale and in smaller-scale idealized configurations. It has also been used to identify problems with coupling to a land-surface model. Going forward, the regional model will provide context for the transition to a unified dynamical core for global and regional modeling.
研究兴趣
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JOURNAL OF THE ATMOSPHERIC SCIENCESno. 11 (2023): 2587-2611
JOURNAL OF CLIMATEno. 15 (2022): 5053-5070
user-5fe1a78c4c775e6ec07359f9(2020)
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