calm

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calm

Meteorol of force 0 on the Beaufort scale; without wind

Calm

 

a condition of little or no wind. On the Beaufort scale, wind velocity during a calm is 0–0.2 m/sec. Calms are usually observed within stable anticyclones, in cols, and in the intertropical convergence zone. Calms occur more often in valleys and basins than in open areas with free circulation of air. There is little turbulence during a calm, and therefore harmful atmospheric aerosols (smoke and gas) may accumulate in the lowest atmospheric layer.

calm

[käm]
(meteorology)
The absence of apparent motion of the air; in the Beaufort wind scale, smoke is observed to rise vertically, or the surface of the sea is smooth and mirrorlike; in U.S. weather observing practice, the wind has a speed under 1 mile per hour or 1 knot (1.6 kilometers per hour).

calm

The absence of wind or an apparent lack of motion of the air. It is depicted on synoptic charts as image.
References in periodicals archive ?
"I've probably calmed down. It's interesting when you have kids [at my age] because you're kind of betwixt and between.
The couple were attacked and called police but the incident had calmed down by the time officers arrived.
If you think deep down she might have a valid point (maybe you did jump to a wrong conclusion or misjudge her), you might say, "Let me think about it, and let's talk again tomorrow when we've calmed down."
In recent years the debate on social history calmed down. This is a good moment to look back and to reflect on what has been reached and what has been missed.
"Although RFK at first sided with the hardliners, he calmed down," writes Steel, and with those three words his account veers into RFK's diplomacy that helped the country draw back from nuclear showdown.
"That euphoria calmed down a few years after," says study coauthor Nediljko Budisa, "mainly because of many toxic effects of thiaproline for other parts of the body."
"It had really calmed down until the rumours that he was going to be sacked started on Monday night.
Hong calmed down for a while but a commotion broke out again when the Korean mauled Choi.