- 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, ...
Natural marks left on a shoreline, trees, or other objects indicating the maximum stage of floods.
Industry:Weather
Mountain waves, lee waves, or trapped lee waves in the air stream flowing over the mountain barrier that occur in association with foehn conditions. The Moazagotl is one example of a foehn wave made visible by lee-wave clouds.
Industry:Weather
Models for the dispersion of gases or particles, usually from a point source. The concentration inside the plume is predicted using Gaussian statistics, with the center line of the plume (the point source advected by the mean flow) at the maximum of the Gaussian distribution, and with the standard deviation of the Gaussian distribution an increasing function of time or downwind distance. See air pollution.
Industry:Weather
Mixing downward of an elevated plume of air pollution (often embedded in a layer of statically stable air such as a temperature inversion) into a turbulent mixed layer that has grown into and entrained the plume. Compare looping, coning, fanning, entrainment zone.
Industry:Weather
Methods of reducing the effects of floods. These methods may be structural solutions (e.g., reservoirs, levees) or nonstructural (e.g., land- use planning, early warning systems).
Industry:Weather
Methods for reducing flood damage in flood-prone areas, particularly in the flood plain. Flood proofing involves techniques such as raising the foundations of new structures above a designated flood elevation, or, for existing buildings, altering exterior walls, windows, and entrances to reduce the frequency of damage to the building.
Industry:Weather
Methods of a passive or active nature that serve to reduce the damage to plants during a frost period. Passive methods include variety selection, site selection, and planting date. Active methods include heaters, fans, flooding, sprinkling, windbreaks, mulching, etc.
Industry:Weather
Method used to determine the average velocity in the vertical in a deep stream (depths greater than 20 ft or 6 m) of depth D, on the basis of a weighted average of velocity observations at depths 0, 0. 2D, 0. 6D, 0. 8D, D below the water surface.
Industry:Weather
