If the number of air molecules above a surface increases, there are more molecules to exert a force on that surface and consequently, the pressure increases.
ATS/ESS 452: Synoptic Meteorology Friday 09 Jan 2014 Finish Overview Presentation Current Weather Discussion Begin Review Material.
ATS/ESS 452: Synoptic Meteorology Friday 22 Aug 2014 Finish Overview Presentation Current Weather Discussion Begin Review Material.
GDAS analysis 500 mb height/absolute vorticity 00z 24 Dec 2010.
