We calculated the expected response of a standard sea-level neutron monitor vs. energy of cosmic ray particles.
(One atmosphere equals 760 millimetres, or 29.92 inches, of mercury; standard sea-level pressure is one atmosphere).
Standard sea-level pressure, by definition, equals 760 mm (29.92 inches) of mercury, 14.70 pounds per square inch, 1,013.25 × 103 dynes per square centimetre, 1,013.25 millibars, one standard atmosphere, or 101.325 kilopascals.
A constant annual value for air density of 1.225 kg m−3, corresponding to standard conditions (sea level, 15 °C), is generally used.
pH in the sea-level bark was lower than that in the montane site (mean ± standard deviation: sea level 3.8 ± 0.61; montane 4.4 ± 0.16), and moisture was similar in the two sites (sea level 42.1 ± 17.8 %; montane 46.7 ± 16.1 %).
For both two models, by using average monthly temperature data of the regions, annual electricity production loss and fuel consumption increase compared to those in standard design conditions (sea level, 15 °C, 60% relative humidity).
Each line represents a standard height above sea level.
Even for violent tornadoes, the reduction in surface pressure in this area (relative to surface pressure in the surrounding atmosphere) is probably no more than 100 hectopascals (that is, about 10 percent of standard atmospheric pressure at sea level).
The original $6 billion Hyperloop concept outlined by Musk in 2013 proposed floating an aluminum passenger-carrying pod on air bearings—"like an air hockey table flipped over," Mayo says and shooting it through a steel tube from which nearly all the air had been vacuumed out to create air pressure about one-thousandth the standard atmospheric pressure at sea level.
