Very high biometric pressure?

Question

The last year or so we seem to be having ever increasing periods of high pressure. The latest was 1044 mb which lasted for a few days. Very close to the limit of our pressure guage. This is close to the record I remember in this area which was 1046 mb but which happened in mid-summer. Have other people noticed increasing number of high pressure periods and does anyone think this is related to Global Warming

Answer 1

High air pressure occurs from a combination of air temperature and air circulation, so by itself, high barometric pressure is not a sign of global warming. In fact, hurricane Katrina that occurred last year was the second lowest air pressure ever recorded on this planet. Katrina occurred because of unusually high ocean temperatures.

High pressure is dry air, low pressure is moist air. Warmer temperatures cause lower air pressure to develop over the oceans near the equator, and cause higher air pressure to build over large continents, and unstable conditions occur in between. At global scale, a warmer earth would have a tendency to have lower air pressure since the earth is 3/4 water, but this could be offset by higher rainfall and changes in wind patterns.

With no change in temperature, high pressure systems can build if air stagnates over a continent. But high pressure systems move toward low pressure systems, so as air pressure builds, winds tend to increase and dissipate the high pressure system. Its the complexity in air circulation and ocean circulation patterns that causes so much uncertainty about global warming. The only thing certain to occur with global warming is chaotic and unpredictable changes in ocean and wind circulation patterns.

Merry Christmas!

Answer 2

biometric pressure - pressure at any point in the Earth's atmosphere.

For more info. go to the web page below.
For the formular go to: http://hyperphysics.phy-astr.gsu.edu/hbase/kinetic/barfor.html