Table 1 Key variables used in the manuscript, their corresponding symbols, and units used in the study
From: Increasing constraint of aridity on tree intrinsic water use efficiency
Variable | Symbol | Unit |
|---|---|---|
Aridity Index | AI | - |
Atmospheric CO2 | Ca | μmol mol−1 |
Carbon Isotope Discrimination | Δ | ‰ |
Correlation Coefficient | R | - |
Fractionation for the CO2 Transfer in the Mesophyll | am | ‰ |
Intercellular CO2 Concentrations | ci | μmol mol−1 |
Intrinsic Water Use Efficiency | W | μmol mol−1 |
Mean Annual Precipitation | MAP | mm |
Mean Annual Temperature | MAT | °C |
Mesophyll Conductance | gm | mol m−2 s−1 |
CO2 Compensation Point in the Absence of Mitochondrial Respiration | Γ* | μmol mol−1 |
Photosynthetic Rate | A | μmol m−2 s−1 |
Sensitivity of W to SPEI | SW | μmol mol−1 per unit SPEI |
Soil Moisture | SM | kg m−2 |
Stable Carbon Isotope Ratio | δ13C | ‰ |
Standardized Precipitation Evapotranspiration Index | SPEI | - |
Stomatal Slope Parameter | g1 | kPa0.5 |
Vapor Pressure Deficit | D | kPa |
