List of model variables, their symbols and definitions.

The unit µmol mol−1 for CO2 concentration (often used in the FvCB model) was converted to µmol m−3 for use in the gas diffusion model by multiplying with a factor for CO2 concentration in the gas phase and for CO2 concentration of the mesophyll, respectively. P (Pa) is the total pressure of the ambient air, R (J mol−1 K−1) is the universal gas constant and T (K) is the temperature.

将常用于FvCB模型（FvCB model）的二氧化碳浓度单位微摩尔每摩尔（µmol mol⁻¹），分别乘以气相二氧化碳浓度与叶肉二氧化碳浓度的转换因子，即可转换为适用于气体扩散模型的微摩尔每立方米（µmol m⁻³）。其中，符号P（单位：帕斯卡，Pa）代表环境空气总压，R（单位：焦耳每摩尔每开尔文，J mol⁻¹ K⁻¹）为通用气体常数，T（单位：开尔文，K）为热力学温度。