- 行业: Weather
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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, ...
A curve showing the variation of temperature with height. See lapse rate.
Industry:Weather
A device for measuring the number of lightning events within a specified time interval.
Industry:Weather
A device attached to electric power lines for estimating certain electrical characteristics of lightning by means of the figures produced on photographic film by the lightning-produced surge carried over the lines. The size of the figure is a function of the potential and polarity of the lightning discharge.
Industry:Weather
A cloud species the elements of which have the form of more or less isolated, generally smooth lenses or almonds; the outlines are sharp and sometimes show irisation. These clouds appear most often in formations of orographic origin, the result of lee waves, in which cases they remain nearly stationary with respect to the terrain (standing cloud), but they also occur in regions without marked orography. This species is found mainly in the genera cirrocumulus, altocumulus, and (rarely) stratocumulus. Altocumulus lenticularis differs from cirrocumulus lenticularis in that, when smooth and without elements, it has shadowed parts while the latter is very white throughout. When undulated or subdivided, the altocumulus species differs from stratocumulus lenticularis in that its elements subtend an angle of less than 5° when viewed at an angle of more than 30° above the horizon. See cloud classification.
Industry:Weather
A cold southward flowing current between Sakhalin and the Asian mainland carrying water from the Sea of Okhotsk into the Sea of Japan.
Industry:Weather
A coefficient defined as the ratio of the dynamic viscosity of a fluid to its density. The kinematic viscosity of most gases increases with increasing temperature and decreasing pressure. For dry air at 0°C, the kinematic viscosity is about 1. 46×10−5 m2 s−1. Common symbols for these variables are μ for dynamic viscosity and ν for kinematic viscosity.
Industry:Weather
A coastal breeze blowing from land to sea, caused by the temperature difference when the sea surface is warmer than the adjacent land. Therefore, it usually blows by night and alternates with sea breeze, which blows in the opposite direction by day. See puelche, karif.
Industry:Weather
A climatic classification scheme developed by Wladimir Köppen (1846– 1940), a German climatologist. This scheme is based upon annual and monthly means of temperature and precipitation and also takes into account the vegetation limits. It is a tool for presenting the world pattern of climate and for identifying important deviations from this pattern.
Industry:Weather
A clay atmometer in the form of a sphere. Evaporation indicated by this instrument is supposed to be somewhat representative of that from plant growth.
Industry:Weather
