中文 WIkipedia 氣壓
海拔3000米以內,大氣壓會隨著高度的提升而下降,其關係為每提高12米,大氣壓下降1mm-Hg(1公釐水銀柱),或者每上升9米,大氣壓就會降低100Pa。
Wikipedia Atmospheric pressure
At low altitudes above sea level, the pressure decreases by about 1.2 kPa (12 hPa) for every 100 metres.
https://www.omnicalculator.com/chemistry/boiling-point-altitude
https://www.cwb.gov.tw/V8/C/W/OBS_County.html?ID=63
這看來是線性關係
https://www.engineeringtoolbox.com/boiling-points-water-altitude-d_1344.html