Isobars


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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Isobars

 

the isolines of atmospheric pressure.

Isobaric charts are compiled most often for the perennial mean monthly pressure, the mean pressure of any period of time, or the pressure at a particular moment. To eliminate the influence of differences in the altitude of individual stations, the pressure measured at them is equated before the isobars are drawn to sea level or to another standard level according to a barometric formula (isobars on altitude weather charts).


Isobars

 

atoms of different chemical elements but with the same mass number (A).

The nuclei of isobars contain the same number of nucleons but different numbers of protons (Z) and neutrons (N). For example, the atoms Isobars, and img0229 are three isobars with A = 10. The masses of isobars with the same A differ slightly because of differences in the binding energies of their nuclei. Isobars with the lowest masses are stable with respect to β-decay, while the heavier ones are unstable. Heavy isobars with an excess of protons are subject to positron β-decay or K-capture; those with an excess of neutrons, to electron β-decay. Mirror nuclei (found among light nuclei), a special case of isobars, are obtained by replacing protons by neutrons and neutrons by protons: for example, img0230 and img0231 or img0232 and img0233.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The isobars on T - [r.sub.+]s plot correspond one- to-one with the G-T plot.
It may look like nothing is going on along the Pacific coast, but look a little closer and you can see a pattern of isobars (F).
French Oil Mill Machinery's Isobar and Isoplaten thermodynamic technology provides the rubber molding industry with a major breakthrough in processing high quality molded parts at a lower cost, increasing customers' profitability.
As the 52 year-old Scot giggled, Bill asked: "Are they tightly packed?" to which Carol replied that the isobars were "getting a good squeeze".
As the 52-year-old Scot giggled, Bill asked: "Are they tightly packed?" To which Carol replied that the isobars were "getting a good squeeze".
@DerekTheWeather: Pressure chart for tomorrow: Lots of isobars = strong winds/gales.
These weather systems are characterised by widely spaced isobars, a gentle pressure gradient, hence the light winds, which also accounts for their slowness in moving away.
This proprietary runnerless technology and methodology is only available through this company as a value-added provider of Isobars, developed and manufactured by Acrolab of Windsor, Ontario, Canada, and sold exclusively under license by French Oil Mill Machinery of Piqua, OH.
There were many complaints from viewers, including Scots fishermen who said lives could be put at risk because the map did not show isobars or wind speeds.
After isobars and depressions, the next big challenge for weatherman Chris Jones will be the Great Wall of China.