2007-03-16 15:29:04 · 4 answers · asked by Chin K 1 in Science & Mathematics ➔ Weather
The pressure at the Earth's surface is equal to to the weight of the column of air in an imaginary tube of unit area of cross section extending from the Earth's surface to the top of the atmosphere.If this value is greater than the the sorrounding adjacent coloumns of air then this unit area of cross section is called high pressure area .On the other hand , if this value is less then it is called low pressure area.
2007-03-16 23:31:05 · answer #1 · answered by Arasan 7 · 0⤊ 0⤋
High pressure is when the air pressure is high, which means that the air is stable. Low pressure is when the air pressure is low, causing moisture to rise and the air mass became unstable, this will often be associated with snowstorms and rainstorms
2007-03-17 04:04:57 · answer #2 · answered by the young weatherman 1 · 0⤊ 0⤋
High pressure is an area where the weight of the air in a vertical column is greater than the weight of surrounding columns of air. And low pressure is the opposite where the weight of a column of air is lower than the weight of surrounding columns of air.
2007-03-16 15:58:26 · answer #3 · answered by 1ofSelby's 6 · 0⤊ 0⤋
Hi,
The National Oceanic and Atmospheric Administration (NOAA) has great info available on their web site at noaa.gov. Here is some info I found for you: http://findanswers.noaa.gov/noaa.answers/consumer/kbdetail.asp?kbid=544
Good luck!
2007-03-17 18:15:15 · answer #4 · answered by intensefirejr 3 · 0⤊ 0⤋