The difference in height between two atmospheric pressure levels. The thickness is directly related to the average temperature in the column of air between the pressure levels (thus, higher thicknesses typically mean warmer temperatures). The most common thickness used is for the 1000-500mb layer. Forecasters also look at other thickness layers such as 1000-850 mb layer (sometimes called low level thickness). Thicknesses are measure in decameters (1 decameter=10 meters).
The height difference between two atmospheric pressure levels and is related to the average temperature in the column.
The geopotential height difference at a given place between specified pressure levels. Thickness values relating to selected standard pressure levels are obtained from radiosonde observations and are plotted on geographical thickness charts. Contours are drawn at an appropriate thickness interval, joining places of equal thickness and are termed 'thickness lines'. Analysis of such charts is termed as 'thickness analysis' and has an important role in synoptic meteorology.