Then, as they drew their isobars, the pattern for the northern hemisphere emerged.
Note the differences in form between the isotherms and the isobars.
Figs. 33-38 show the arrangement of the isobars on these days.
Describe the distribution of pressure as shown by the arrangement of the isobars.
The scale must, however, be laid perpendicularly to the isobars, as before.
To isobars, as well as to isotherms, Dr. Buchan has devoted considerable attention.
The lines of equal pressure or isobars generally curve and inclose what is known as a cyclonic centre, or depression or LOW.
The isobars may be traced off as far away from the center as the 30.20-inch line in most cases.
Select the station (between two isobars on any weather map) at which you intend to make your observation.
In most cases the 29.80-inch isobar furnishes a good limit, out to which the isobars may be traced.