- Industry: Weather
- Number of terms: 60695
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The American Meteorological Society promotes the development and dissemination of information and education on the atmospheric and related oceanic and hydrologic sciences and the advancement of their professional applications. Founded in 1919, AMS has a membership of more than 14,000 professionals, ...
The heat capacity of a system divided by the number of moles in that system.
Industry:Weather
Any conventional barometer fitted with an extended scale so that atmospheric pressure measurements may be made at both high and low altitudes.
Industry:Weather
A synoptic code in which observations of clouds at and below station elevation of mountain stations are encoded and transmitted.
Industry:Weather
Ridges or deposits of rock debris transported by a glacier. Moraines are left after a glacier has receded, providing evidence of its former extent. Common forms are ground moraine, formed under a glacier; lateral moraine, along the sides; medial moraine, down the center; and end moraine, deposited at the terminus.
Industry:Weather
A wind squall or succession of wind squalls, frequently accompanied by a spectacular low roll cloud or a series of such clouds, that occurs early in the morning, mainly in the late dry season (September–October) at places around the southern coast of the Gulf of Carpentaria region of northern Australia. The cloud lines may be up to a few kilometers across in the direction of travel, usually from the east or northeast, and are of considerable lateral extent, often stretching from horizon to horizon with a remarkably uniform cross section.
Industry:Weather
The sound heard through the monitoring speaker of an audio-modulated radiosonde when the audio signal became so low in frequency that it resembled the sound of a motorboat. It corresponded to unmeasurable low humidities. Modern sondes do not have such stringent limitations or produce such a signal.
Industry:Weather
A cloud from which another cloud has grown or been formed. See cloud classification.
Industry:Weather
A study of the structure, form, or shape of meteorological phenomena, such as clouds or ice crystals; includes the classification of these phenomena.
Industry:Weather
The moon seen near the horizon appears larger than the moon seen high in the sky. This difference is illusory, for there is no difference in the angular widths of moon from one situation to the other. (There is normally a small difference in the angular heights of the moon due to refraction in the atmosphere, but this serves to lessen the height on the horizon rather than increase it). Yet the illusion is sufficiently compelling to cause most observers to be convinced that the moon actually has a significantly larger angular size when near the horizon, and that this has a physical origin in the optics of the atmosphere. But the phenomenon is perceptual and its explanation lies in the realm of psychology. No single explanation has been found that accounts for all aspects of what people claim to see. One explanation that accounts for some aspects of the phenomenon does relate to meteorological optics. The clear sky is not perceived to be a hemisphere, but a variety of shapes, for example, a flattened dome; the horizon being seen as significantly farther from the observer than the zenith. Further, the moon appears to be pasted on the horizon and so shares its distance. The perceptual phenomenon of size constancy will then cause something of fixed angular size but apparently varying in distance to appear larger at the greater distance of the horizon. Suffice it to say that there are aspects of the illusion that are consistent with this explanation and others that are at variance with it.
Industry:Weather
