关键词: 地球系统模式（ESM）, 耦合器, 代码复用, 自动生成

Abstract: Coupler is an important part of the earth system model (ESM). It connects various component models. Based on the CPL coupler interface, this paper separates the component models codes from the system model, in order to achieve the goal to read coupler interface only rather than understand the complex internal coupler of the system for component models exports. Then this paper studies two ways to code with coupler interface: reusing the duplicate codes to get unification codes and automated generation codes. Firstly, repetitive codes of different component models from coupler interface are reused to unify. Secondly, codes will be automatically generated after filling up the corresponding contents of variables on the configuration files by component models exports. Those variables will replace special variables from template files and loop traversal. Those contents can be inserted into the final codes to finish automated generation codes. Furthermore, the ESM with coupler interface which adds coding reuse and automated generation is deployed to Chinese Academy of Sciences (CAS) super computer, ERA. The results of coupler with the two techniques are consistent with the original simulation one.

Key words: earth system model (ESM), coupler, coding reuse, automated generation