Table 1.
Barometric pressure and BP-dependent parameters for the months we analyzed: monthly means ± standard deviation (SD), coefficient of variation (CV%), and minimum and maximum values. Sample size—41 monthly means (1979–2019).
| BP [hPa] |
Alt [m] |
VO2max [ml·kg−1·min−1] |
Speed [m·h−1] |
|
|---|---|---|---|---|
| Everest (May) | 333 ± 1 (0.3%) | 8925 ± 20 (0.2%) | 16.2 ± 0.1 (0.7%) | 190 ± 2 (1%) |
| min 331, max 336 | min 8878, max 8972 | min 16.0, max 16.5 | min 184, max 195 | |
| K2 (July) | 347 ± 1 (0.3%) | 8640 ± 20 (0.2%) | 17.8 ± 0.1 (0.6%) | 223 ± 2 (1%) |
| min 345, max 349 | min 8595, max 8679 | min 17.6, max 18,0 | min 218, max 228 | |
| Everest (January) | 324 ± 1 (0.5%) | 9134 ± 39 (0.4%) | 15.1 ± 0.2 (1.4%) | 165 ± 5 (2.8%) |
| min 321, max 328 | min 9049, max 9192 | min 14.7, max 15.5 | min 159, max 175 | |
| K2 (January) | 325 ± 2 (0.6%) | 9099 ± 42 (0.5%) | 15.3 ± 0.2 (1.5%) | 170 ± 5 (2.9%) |
| min 321, max 329 | min 9020, max 9205 | min 14.7, max 15.7 | min 157, max 179 | |
| Everest (February) | 324 ± 2 (0.6%) | 9134 ± 41 (0.4%) | 15.1 ± 0.2 (1.5%) | 165 ± 5 (3.0%) |
| min 320, max 328 | min 9040, max 9223 | min 14.6, max 15.6 | min 155, max 176 | |
| K2 (February) | 326 ± 2 (0.7%) | 9091 ± 53 (0.6%) | 15.3 ± 0.3 (1.9%) | 170 ± 6 (3.7%) |
| min 321, max 332 | min 8952, max 9189 | min 14.7, max 16.1 | min159, max 187 |
BP, barometric pressure; Alt, perceived altitude; VO2max, maximal oxygen uptake; Speed, vertical climbing speed.