Table 1.
Measurement techniques and respective conditions for the determination of the sorption isotherm of Kurile larch.
| Method | Salt used | Relative humidity | Pressure | Water potential | Calculation of |
|---|---|---|---|---|---|
| [%] | [bar] | [J kg-1] | RH % by | ||
| Saturated salt solution | NH4NO3 | 64.1 | 42.01 | -60364 | Equation 30 in Mozurkewich (1993) |
| NaCl | 75.5 | 26.6 | -38172 | Linear interpolation of RH values at 20 and 25°C in Table 2 of Greenspan (1977) | |
| KCl | 85.0 | 15.3 | -21972 | ||
| KNO3 | 94.5 | 5.3 | -7643 | ||
| Pressure plate | n.a. | 99.67 | 4.44* | -44.0 | Rearrangement of Equation 1 in Fredriksson and Johansson (2016) |
| n.a. | 99.89 | 1.46* | -15.0 | ||
| n.a. | 99.97 | 0.45* | -5 |
All the RH values shown for the salt solutions were calculated as detailed in the table, and the pressure as well as the water potential were determined from these. For the pressure plate method, the pressure is the pressure that was applied in the experiment (marked with *), which was then used to calculate the corresponding RH and water potential as explained in the main text.