Is the pressure in the atmosphere constant?

Answer 1

No. In fact, variation in atmospheric pressure is one of the most useful forecasting tools there is. A low pressure center might have a pressure of, say 990 mb. This indicates inflow and upward flow, which goes along with a storm. A hurricane could be as low as 900 mb at the center, which indicates REALLY strong inflow and upward motion. A high pressure center, which might typically have a pressure of 1020 mb indicates descending air, which becomes hot and dry as it falls. Take a look at a surface pressure map at http://weather.unisys.com/. Vertically, the pressure differences are even more dramatic. At approximately 5.5 km above the surface, the pressure is about 1/2 of what it is at the surface. Typically, meteorologists talk about the height of a surface with constant pressure, but the idea is the same.

Answer 2

No. Air pressure varies with the density of the air which is generally a function of altitude and/or temperature. As a general rule, the colder the air is, the denser it is and the higher the air pressure is. Also, as a general rule, the higher the altitude, the less dense the air so pressure is lower.

Answer 3

No. Throughout human history, the proportion of carbon dioxide in the atmosphere was fairly constant, in the range of 260 to 280 parts per million (ppm). However, this is no longer the case, with atmospheric carbon dioxide levels rising to over 380 ppm. There is also a small seasonal fluctuation because of less photosynthesis in the Northern Hemisphere winter period.

Answer 4

No, the atmospheric pressure at the surface of Earth is not constant. Pr

pressure varies depending on altitude and weather conditions.

Answer 5

No. Atmospheric pressure varies depending on altitude and weather conditions. 1 atm of pressure is the average atmospheric pressure at sea level.

Answer 6

No, decreasing rate