- 行业: Weather
- Number of terms: 60695
- Number of blossaries: 0
- Company Profile:
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, ...
In general, the climate that maintains tropical rain forest vegetation; that is, a climate of unbroken warmth, high humidity, and heavy annual precipitation.
Industry:Weather
Propagation of radio waves through the atmosphere caused by scattering from inhomogeneities in the refractive index of the air. Troposcatter enables propagation beyond the radio horizon.
Industry:Weather
Propagation of radio waves through the atmosphere caused by scattering from inhomogeneities in the refractive index of the air. Troposcatter enables propagation beyond the radio horizon.
Industry:Weather
The difference between consecutive daily mean values of the horizontal component of the geomagnetic field. Each value is derived from a 48-hour interval covering two GMT days and is assigned to the second day of the pair. The monthly U index, the mean of the daily values, is the most frequently used. See u index.
Industry:Weather
A pressure trough existing in the upper air. This term is sometimes restricted to those troughs that are much more pronounced aloft than near the earth's surface. These troughs are often described as either short-wave or long-wave features.
Industry:Weather
A pressure ridge existing in the upper air, especially one that is stronger aloft than near the earth's surface.
Industry:Weather
In general, the climate that maintains tropical rain forest vegetation; that is, a climate of unbroken warmth, high humidity, and heavy annual precipitation.
Industry:Weather
The quantity of heat required to complete some stage, or the whole, of a plant's growth. It was first investigated by Réaumur about 1735, using the sum of the mean daily temperatures. It may also be measured by the sum of air temperatures above some standard such as 42°F (see degree-day). In modern agricultural climatology this concept has been largely abandoned in favor of complex influence factors such as evapotranspiration. It has also been established that soil temperatures at or somewhat below 10 cm are more important for plant growth than air temperature.
Industry:Weather
A diagram in which one coordinate is time and the other is distance (usually height, in which case it is a vertical time section). Compare cross section, profile, time–height section.
Industry:Weather
In the wave-front method of minimal flight planning, a line through positions attainable in an equal flight time from a given origin.
Industry:Weather
