- 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, ...
The degree to which a climate lacks effective, life-promoting moisture; the opposite of humidity, in the climate sense of the term. The overall concept of aridity versus humidity is coming to be known as precipitation effectiveness. Two basic approaches have been made. The first, used by W. Köppen and modified by Bailey, does not openly define aridity, but rather assigns delimiting values of annual precipitation (treated with regard to distribution and temperature) to separate a dry climate from other types. The second approach actually prescribes a measure of aridity or precipitation effectiveness and uses these values as a primary parameter of classification. Of this type are Thornthwaite's precipitation- effectiveness index and moisture index, E. De Martonne's index of aridity, W. Gorczyński's aridity coefficient, Lang's moisture factor, and Ångström's humidity coefficient.
Industry:Weather
1. A region with insufficient moisture where evaporation exceeds precipitation. 2. Sometimes used synonymously with equatorial dry zone.
Industry:Weather
An area lacking surface runoff or drainage, such as deserts, in which surficial drainage is almost completely lacking, or where rainfall is so infrequent that all water sinks into the ground or evaporates.
Industry:Weather
A data collection and location system installed on POES satellites. Argos, provided by France, allows environmental data sensed by remote platforms, fixed or moving, to be collected by POES satellites and retransmitted to ground processing stations.
Industry:Weather
Noble gas, symbol Ar, of atomic mass 40, that composes 0. 93% by volume of dry air. Argon is constantly produced in the earth's crust from the radioactive decay of 40K and is subsequently released into the atmosphere. It is the most abundant of the inert gases in the atmosphere, and the third most abundant of all atmospheric constituents. Argon was discovered by Rayleigh and Ramsay in 1894.
Industry:Weather
For areal rainfall of a given duration and return period, it is the ratio of the mean areal rainfall to the mean point rainfall for the same duration and return period in the same area.
Industry:Weather
Curve showing what the surface area of a reservoir is at an indicated elevation above a specific level.
Industry:Weather
A weather forecast for a specified geographic area; usually applied to a form of aviation weather forecast (to distinguish it from terminal forecast, route forecast, and flight forecast).
Industry:Weather
The area within the cone of depression of a discharging well or the cone of impression of a recharging well.
Industry:Weather
A line of cumuliform clouds that forms as a result of local convergence along the boundary separating low-level convective storm outflow from the surrounding environment.
Industry:Weather
