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At sea level, atmospheric pressure is about 1,000 mb (100 kPa). At the top of Mt. Everest —a height of 29,032 feet (8.85 kilometers)—pressure drops to about 300 mb (30 kPa). The air is so thin at an altitude of 31 miles (50 kilometers) that it exerts a pressure of only 1 mb (0.1 kPa).
- Atmospheric Pressure
Map of global mean air pressure at sea level in July, where...
- Atmospheric Pressure
Air pressure is the weight of air molecules pressing down on the Earth. The pressure of the air molecules changes as you move upward from sea level into the atmosphere. The highest pressure is at sea level where the density of the air molecules is the greatest.
19 paź 2023 · An atmosphere (atm) is a unit of measurement equal to the average air pressure at sea level at a temperature of 15 degrees Celsius (59 degrees Fahrenheit). One atmosphere is 1,013 millibars, or 760 millimeters (29.92 inches) of mercury. Atmospheric pressure drops as altitude increases.
Map of global mean air pressure at sea level in July, where high-pressure centers are more pronounced, especially over the North Atlantic and North Pacific oceans. Near Earth’s surface, atmospheric pressure decreases with height at a rate of about 3.5 millibars for every 30 meters (100 feet).
Air pressure, or atmospheric pressure, is the force exerted by air molecules on Earth’s surface. This pressure, highest at sea level, decreases with altitude. Air pressure significantly affects weather as it guides wind patterns and weather systems.
When gravity acts on the air, the air exerts a force upon the earth called pressure. The typical pressure at sea level is 1013.25 millibars or 14.7 pounds per square inch. A millibar is a unit that is used to report the the atmospheric pressure.
Pressure at sea level averages about 14.7 pounds per square inch (101,320 newtons per square meter), or one “atmosphere” (a unit of pressure). Roughly speaking, pressure is cut in half with every additional 3.5 miles (5.6 kilometers) above the ground.
