Response of Resolved Convection to Parameterized Turbulence and Clouds in Cloud Resolving Simulations
Abstract
This study explores the sensitivity of resolved convection to parameterized turbulence and clouds in idealized cloud resolving simulations based on GFDL AM4.0. The goal of this study is twofold: (1) to examine the scale-adaptability of different physics suites in AM4.0 in representing effects of subgrid-scale turbulence and clouds at cloud-resolving resolutions, and 2) to understand the role of parameterized turbulence and clouds to the statistical behaviors of resolved convection and radiative-convective-equilibrium states. Three different physics suites that mainly differ in the representation of turbulent transport are tested at 1-10 km horizontal resolutions: 1st-order K-profile and 1.5-order TKE (turbulence kinetic energy) schemes for turbulent transport with Tiedtke cloud macrophysics, and CLUBB (Cloud Layers Unified By Binormals) that unifies turbulent transport and cloud macrophysics. Preliminary results show that the three physics suites exhibit similar response of basic equilibrium states to model resolution (e.g., precipitation, cloud fraction, temperature and humidity profiles), while sensitivity to physics parameterizations holds regardless of model resolution.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2018
- Bibcode:
- 2018AGUFM.A23N3109S
- Keywords:
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- 3305 Climate change and variability;
- ATMOSPHERIC PROCESSESDE: 3337 Global climate models;
- ATMOSPHERIC PROCESSESDE: 3355 Regional modeling;
- ATMOSPHERIC PROCESSESDE: 0550 Model verification and validation;
- COMPUTATIONAL GEOPHYSICS