E3SM Chemistry Diagnostics Package (ChemDyg) Version 0.1.4
Abstract. The E3SM Chemistry diagnostics package (ChemDyg) is an open-source software, all diagnostic scripts written in Python, developed to support the Department of Energy (DOE) Energy Exascale Earth System Model (E3SM). The current version 0.1.4 of ChemDyg generates several diagnostic plots and tables for model-to-model and model-to-observation comparison, including 2-dimentional contour mapping plots, diurnal and annual cycle plots, time-series plots, and comprehensive processing tables. ChemDyg is executed by zppy, which is a post-processing toolchain for E3SM written in Python. The ChemDyg codebase is designed to be modular, and each diagnostics set is self-contained. Each set has its own driving script that includes set-specific file input/output and a main python script for calculation and plotting. The outputs from each diagnostics set, including figures and tables, are organized in the main HTML page to make it interactive through a browser.
This paper is a comprehensive description of E3SM ChemDyg (as of version 0.1.4) including the details of each diagnostics set and its required input data formats. This tool has enough flexibility for future ChemDyg developers to increase the addition of new observational datasets and new diagnostics sets.
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