Program Developed for CO2 System Calculations

The program CO2SYS performs calculations relating parameters of the carbon dioxide (CO2) system in seawater and freshwater. The program uses two of the four measurable parameters of the CO2 system [total alkalinity (TA), total inorganic CO2 (TCO2), pH, and either fugacity (fCO2) or partial pressure of CO2 (pCO2)] to calculate the other two parameters at a set of input conditions (temperature and pressure) and a set of output conditions chosen by the user. It replaces and extends the programs CO2SYSTM.EXE, FCO2TCO2.EXE, PHTCO2.EXE, and CO2BTCH.EXE, which were released in May 1995. It may be run in single-input mode or batch-input mode and has a variety of options for the various constants and parameters used. An on-screen information section is available that includes documentation on various topics relevant to the program. This program may be run on any 80 x 86 computer equipped with the DOS operating system by simply typing CO2SYS at the prompt after loading the executable file CO2SYS.EXE.CO2SYS程序可用于计算海水与淡水体系中二氧化碳（carbon dioxide, CO₂）系统的相关参数。该程序选取二氧化碳体系四大可测量参数中的任意两项——总碱度（total alkalinity, TA）、总无机二氧化碳（total inorganic CO₂, TCO₂）、pH值，以及二氧化碳逸度（fugacity, fCO₂）或二氧化碳分压（partial pressure of CO₂, pCO₂）——来计算指定输入条件（温度与压强）与用户自定义输出条件下的其余两项参数。该程序替代并扩展了1995年5月发布的CO2SYSTM.EXE、FCO2TCO2.EXE、PHTCO2.EXE及CO2BTCH.EXE四款程序。程序支持单输入模式与批量输入模式，且内置多款针对所用常量与参数的配置选项。程序内置屏幕信息模块，涵盖与该程序相关的各类主题文档。在搭载DOS操作系统的任意80×86架构计算机上，加载可执行文件CO2SYS.EXE后，仅需在命令提示符中输入`CO2SYS`即可运行该程序。