- Industry: 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, ...
1. Recently fallen snow in which the original form of the snow crystals is recognizable. 2. The amount of snow fallen within the previous 24 hours.
Industry:Weather
A cold wind descending from a mountain glacier (glacier wind) or snowfield, for example, in the higher valleys of Ecuador.
Industry:Weather
The atmospheric shell from the earth's surface upward in which the atmospheric constituents are for the most part not ionized, that is, electrically neutral. The region of transition between the neutrosphere and the ionosphere is somewhere between 70 and 90 km, depending on latitude and season.
Industry:Weather
Technique used for the indirect measurement of soil moisture content based on the thermalization (slowing) and scattering of emitted neutron radiation upon encountering hydrogen atoms, which occurs primarily in the water in moist soil.
Industry:Weather
Assessment of the fluid properties in a borehole by bombardment with fast-moving neutrons and measurement of resultant radiation.
Industry:Weather
An uncharged subatomic particle. The rest mass of the neutron is slightly greater than that of the proton. Atomic nuclei are composed of protons and neutrons bound together by nuclear forces. The common term for neutron or proton is nucleon. Although the neutron is electrically neutral it does possess a charge structure and a magnetic dipole moment. The existence of the neutron was first demonstrated by James Chadwick in 1932.
Industry:Weather
A neutral surface is that surface along which fluid particles can be exchanged without doing any work against gravity. For many oceanographic purposes it is sufficiently accurate to assume that this surface is defined by a constant value of potential density. In ocean mixing studies, however, this definition will often not be sufficiently accurate due to lateral variations of temperature, salinity, and pressure along a potential density surface. These variations will cause fluid particles from different points within the potential density surface to migrate slightly off that surface when they are displaced laterally.
Industry:Weather
Large storm system possessing both tropical and extratropical characteristics.
Industry:Weather
The net flux density of terrestrial radiation. This is the difference between upwelling and downwelling longwave flux density, which may be referenced to any specified altitude, but is most commonly referenced to the surface. The long- term global average for the net terrestrial radiation leaving the earth's surface is approximately 50 W m<sup>−2</sup>.
Industry:Weather
Usually used to mean “artificial neural network,” a computer program inspired by simple models of the brain. It consists of a network of nodes connected by weighted links that establish the relationships between nodes. Each node sums the weighted inputs entering it and compares the result to a (usually) nonlinear function to produce its own output. Most neural networks have a training rule establishing how the weights are adjusted to bring the average output closest to that desired. The term can also mean the computer chip containing the fully trained (unmodifiable) system used in automatic sensors and controls. See also machine learning.
Industry:Weather
