期刊名称：Journal of Advances in Modeling Earth Systems
电子版ISSN：1942-2466
出版年度：2021
卷号：13
期号：6
页码：e2020MS002401
DOI：10.1029/2020MS002401
出版社：John Wiley & Sons, Ltd.
摘要：Mesoscale organization of convection is typically not represented in global circulation models, and hence its influence on the global circulation is not accounted for. The heating component of a parameterization that represents the dynamical and physical effects of circulations associated with organized convection, referred to as the multiscale coherent structure parameterization (MCSP), is implemented in the Energy Exascale Earth System Model version 1 (E3SMv1). Numerical simulations are conducted to assess its impact on the simulated climate. Besides E3SMv1 simulations, we performed high-resolution (2 km) simulations using the Weather Research and Forecasting (WRF) Model to determine the temperature tendencies induced by mesoscale convective systems embedded in deep convection. We tuned the free parameters of the MCSP based on the WRF simulations. MCSP heating enhances Kevin wave spectra in E3SMv1, improves the representation of the Madden-Julian Oscillation, and reduces precipitation biases over the tropical Pacific. Plain Language Abstract Most general circulation models do not account for important circulation changes associated with organized convection. We implement a new parameterization of heating associated with mesoscale circulations in Energy Exascale Earth System Model version 1 (E3SMv1). The parameterization improves the representation of Madden-Julian Oscillation simulated by E3SMv1 and also reduces the precipitation biases in the tropical West Pacific.
