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Table I
Altitudinal variations in summer air temperature (Tas), air pressure (Patm), ambient CO2 partial pressure (PCO2 − A at 375 ppm of molar fraction), and molar fraction (xCO2 − C) imposed to obtain PCO2 −C for each species.
| Elevation (m) | Tas (°C) | Patm (hPa) | PCO2 − A (Pa) | xCO2 − C (ppm) | |
|---|---|---|---|---|---|
| Beech-sites | 131 | 19.6 | 997.9 | 37.4 | 376 |
| 495 | 17.7 | 956.0 | 35.9 | 392 | |
| 773 | 16.9 | 925.1 | 34.7 | 405 | |
| 1190 | 13.1 | 879.1 | 33.0 | 427 | |
| 1604 | 13.4 | 836.9 | 31.4 | 448 | |
| Oak-sites | 131 | 19.6 | 997.9 | 37.4 | 376 |
| 425 | 18.9 | 964.1 | 36.2 | 386 | |
| 627 | 18.0 | 941.4 | 35.3 | 389 | |
| 803 | 17.5 | 922.0 | 34.6 | 398 | |
| 1235 | 16.4 | 875.9 | 32.8 | 407 | |
| 1608 | 14.0 | 836.9 | 31.4 | 428 | |