![]() Changes in barometric pressure can affect water levels in lakes and their estuaries. It also affects the way gases like oxygen dissolve in water. That means less air is pushing into your lungs, and less oxygen is going through your bloodstream.Ĭhanges in the barometric pressure can help scientists observe and predict weather. At high altitudes, there’s less pressure. The difference is the air’s pressure and density. In mountain towns with altitudes of 8,000 feet or more above sea level, the amount of oxygen in the air is the same as the air at sea level. The higher up you go, the lighter the weight of the air.įor example, many people believe that altitude sickness is caused by a dip in oxygen levels. The portion of the atmosphere that sustains life only extends for three miles. The layer of air that scientists can measure with reasonable accuracy extends around 25 miles up, according to LiveScience. That weight increases or decreases with changes in altitude and temperature.īarometric pressure - also known as atmospheric pressure - describes the weight of the air surrounding the earth. ![]() ![]() Did you know that air has weight? At sea level, every square inch column of air weighs an average of 14.7 pounds, according to Acurite. ![]()
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