Improvements of numerical schemes for the global cloud-resolving climate simulations in near future

点击翻译按钮获取中文摘要

A state-of-the-art global cloud-resolving model (CRM) that computes cloud microphysical processes directly without using cumulus parameterizations is being developed in Japan by using cutting-edge supercomputers such as "K" and the Earth Simulator. It is widely thought that global CRMs will enable climate simulations of higher reliability if they can be run on much faster computers in near future. Currently, however, there remain problems in a global CRM even in the component called "dynamics", which consists of a discretized set of the equations of fluid, in terms of the stability and the accuracy. In this work, new transport schemes and a new discretization method of the gradient operator were developed in the horizontal direction and a partial cell method was tested for the vertical direction. Those schemes developed in this work will enhance a credibility of a global CRM.