approx 330 mbar
The air pressure at the top of Mount Everest is low pressure. At high altitudes, such as on Mount Everest there is less air above you. This means that the density and pressure of air decreases as altitude increases. Each intake of air on Mount Everest has only one-third of the gas molecules-including oxygen-that would be present at sea level.
At high altitudes, such as on Mount Everest there is less air above you. This means that the density and pressure of air decreases as altitude increases. Each intake of air on Mount Everest has only one-third of the gas molecules-including oxygen-that would be present at sea level.
Millibars.
millibars. One one-thousandth of atmospheric pressure.
Normal atmospheric pressure is around 1013.25 millibars (MB) at sea level. However, this value can vary slightly depending on weather conditions and altitude.
mb is a unit of measurement for pressure, 1 mb is 0.001 bar. mb is an abbreviation for millibar 1 bar is roughly atmospheric pressure
Formulas for atmospheric pressure variation with altitude. Scroll down to related links and look at "Atmospheric pressure - Wikipedia".
Atmospheric pressure is typically measured in units of millibars (mb) or kilopascals (kPa). The standard unit for atmospheric pressure is the pascal (Pa), with 1 atmosphere being approximately 1013.25 hPa or 101.3 kPa.
Well this is a twofold answer because pressure itself does not mean anything when it comes to wind but rather pressure gradient or how fast the pressure drops over a given area. The faster the pressure drops over a small area the stronger the wind is forced to blow.Now lets take 2 examples here: atmospheric pressure 915 mb pressure drop: 25 mb Distance: 100 miles pressure drop/mile = 1/4 mb atmospheric pressure: 990 mb pressure drop: 25 mb Distance: 100 miles pressure drop/mile = 1/4 mb in these 2 situations the wind would blow the same speed. However like most situations the standard air pressure outside of the system would be around the same pressure or around 1010 mb so if we have the same 2 storms again but one of the storms is much larger then the other storm here is the result: atmospheric pressure 915 mb pressure drop: 95 mb Distance: 380 miles pressure drop/mile = 1/4 mb atmospheric pressure: 990 mb pressure drop: 20 mb Distance: 80 miles pressure drop/mile = 1/4 mb Again the wind speed would be the same since we are still falling at 1/4 mb per mile. So atmospheric pressure, storm size, surrounding air pressure, and other factors all come into play here... however if you had 2 of the same sized storms in the same atmospheric conditions but one had a pressure of 915 mb and the other had an air pressure of 990 mb the one with the 915 would have a higher wind speed due to a higher pressure gradient.
To find the percentage of atmosphere above a certain height in kilometers, you can use the barometric formula to calculate the pressure at that height. Then, you can simply divide the pressure at the given height by the pressure at sea level (1013.25 mb) and multiply by 100 to get the percentage of atmosphere above that height.
It isn't constant anywhere, no. 1013.25 mb is simply the average pressure, which is particularly important at sea level because that is how observations are standardized. But atmospheric pressure always varies no matter where you are, as a consequence of having weather.
Earth doesn't have one continuous, constant atmospheric pressure, it varies both spatialy and temporally. Assuming you're talking about the atmospheric pressure at the Earth's surface, the "standard" atmospheric pressure is 1000 millibars (mb), however pressures can range anywhere from ~875 mb (in intense low pressure areas such as the center of tropical cyclones) to ~1080mb.