Is it to do with the cold weather?
2007-12-12 07:09:34 · 3 answers · asked by rojerwilko 1 in Science & Mathematics ➔ Weather
High pressure is a common culprit. Light winds and no moisture.
2007-12-12 07:12:36 · answer #1 · answered by Gavin T 7 · 0⤊ 0⤋
As Gavin says, it is the high pressure and little or no wind. High pressure means that the air sinks and therefore pollution is trapped under it. In the winter time, you may also see inversion in a high pressure. That is when the temperature at the surface is cooler than up. Again, it prevents the air to rise as it does in the summer when the heat of the sun warms the surface of the earth and creates thermal bubbles that rise and that are loved by glider pilots.
2007-12-12 07:49:08 · answer #2 · answered by Michel Verheughe 7 · 0⤊ 0⤋
It usually is highly oxygenated fresh air from the sea which reduces pollution. Usually High pressure prevents air to be moved from sea to land
2007-12-14 03:37:37 · answer #3 · answered by The Rugby Player 7 · 0⤊ 0⤋