- Industry: Weather
- Number of terms: 60695
- Number of blossaries: 0
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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, ...
1. In meteorology, an elongated area of relatively high atmospheric pressure, almost always associated with and most clearly identified as an area of maximum anticyclonic curvature of wind flow. The locus of this maximum curvature is called the ridge line. Sometimes, particularly in discussions of atmospheric waves embedded in the westerlies, a ridge line is considered to be a line drawn through all points at which the anticyclonically curved isobars or contour lines are tangent to a latitude circle. The most common use of this term is to distinguish it from the closed circulation of a high (or anticyclone); but a ridge may include a high (and an upper-air ridge may be associated with a surface high) and a high may have one or more distinct ridges radiating from its center. The opposite of a ridge is a trough. 2. Also used as reference to other meteorological quantities such as equivalent potential temperature, temperature, and mixing ratio. That is, an elongated area of relatively high values of any particular field emanating from a maximum. 3. In oceanography, a linear accumulation of broken ice blocks projecting upward, formed by ice deformation, often at the edge of a floe. A ridge is distinguished from a hummock by being much longer than it is wide. The term ridge is often used to describe an entire ridged ice feature, in which case the portion above the water line is termed the sail and the portion below the water line is termed the keel.
Industry:Weather
1. A layer of soil or bedrock at a variable depth beneath the surface of the earth in which the temperature has been below freezing continuously from a few to several thousands of years. Permafrost exists where the summer heating fails to descend to the base of the layer of frozen ground. A continuous stratum of permafrost is found where the annual mean temperature is below about −5°C (23°F). Compare pereletok; See active layer. 2. As limited in application by P. F. Svetsov, soil that is known to have been frozen for at least a century.
Industry:Weather
A thermodynamic process in which a substance changes from one phase to another. A phase change entails discontinuity. At a given temperature, two phases of a pure, homogeneous substance are characterized by different enthalpies (and entropies), and the enthalpy difference is called latent heat. The phase transitions of greatest importance to meteorology are those between water vapor, liquid water, and ice.
Industry:Weather
A function that has different constant values over adjacent subintervals; thus it has discontinuities at the ends of each interval. The distribution function of a discrete variate and a histogram have this shape.
Industry:Weather
Any cyclone (or low), especially a frontal cyclone, within which a circulation of one or more secondary cyclones have developed. The term is sometimes applied to the stronger of a system of two cyclones that together form a multilobed cyclone.
Industry:Weather
Usually replaced by wind- chill index for winter conditions and heat index for summer conditions.
Industry:Weather
A cyclone that forms near, or in association with, a primary cyclone. For example, secondary cyclones often form along the east coast of the United States when a primary cyclone is present in the Great Lakes region. Similarly, secondary cyclones often occur over the Baltic when a primary cyclone is present near the coast of Norway. See'' also'' center jump.
Industry:Weather
Ένα μέσο για τον καθορισμό, την κατεύθυνση και την σχετική ταχύτητα της κίνησης σύννεφο. Υπάρχουν δύο βασικά σχέδια του nephoscope: η άμεση όραση nephoscope και το nephoscope του καθρέφτη.
Industry:Weather
Μια περιοχή υψηλής ευκρίνειας διακριτοποίηση ενσωματωμένα μέσα σε μια περιοχή χαμηλής ανάλυσης ένα αριθμητικό σύστημα μοντέλο ή ανάλυση. Εξαίρετου ψηφίσματος μπορεί να επιδιωχτεί να επικεντρωθεί σε ένα χαρακτηριστικό μέσης κλίμακας όπως ένας τροπικός κυκλώνας ή σε μια γεωγραφική περιοχή ενδιαφέροντος. Στην αμφίδρομη ένθετα πλέγματα, πληροφορίες είναι πέρασε εμπρός και πίσω μεταξύ υψηλής και χαμηλής resolution περιφερειών, σε αντίθεση με μονόδρομη πλέγματα, στην οποία οι πληροφορίες είναι περάσει απλώς από χαμηλό σε υψηλό resolution περιοχές. Δείτε το πλέγμα συμπτύσσοντας, μεταβλητή ψήφισμα μοντέλο.
Industry:Weather
1. Ένα εργαστηριακό όργανο για την παραγωγή του νέφους από τη διαδικασία της συμπύκνωσης. 2. Ένα μέσο για την επίδειξη η θερμοκρασία αλλαγές που συμβαίνουν στον αέρα που είναι γρήγορα ή συμπτύσσονται.
Industry:Weather
