- 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, ...
A datum level defined by the Permanent Service for Mean Sea Level for each station, relative to which the mean sea level is approximately 7 m above. Measurements at the location, over different periods, and to different tide gauge benchmarks are all related to this defined datum. The value of 7 m was chosen to avoid confusion with other local datum definitions.
Industry:Weather
A descriptive book for the use of mariners, containing detailed information on a wide variety of material important to navigators of coastal and intracoastal waters. Most of this information cannot be shown graphically on the standard nautical charts and is not readily available elsewhere. This information includes navigation regulations, outstanding landmarks, channel and anchorage peculiarities, dangers, weather, ice, currents, and port facilities. They are compiled and issued by national hydrographic authorities. For waters of the United States and its possessions, sailing directions are published by the National Ocean Service and are called United States Coast Pilots.
Industry:Weather
A description of the properties of sea surface waves at a given time and place. This might be given in terms of the wave spectrum, or more simply in terms of the significant wave height and some measure of the wave period.
Industry:Weather
A descending motion of air in the atmosphere, usually with the implication that the condition extends over a rather broad area.
Industry:Weather
A depth below the sea surface at which water properties should be measured and reported, either directly or by interpolation, according to the proposal by the International Association of Physical Oceanography in 1936; analogous to the mandatory levels of meteorological upper-air observations.
Industry:Weather
A depression that moves in a direction opposite to the mean flow in which it is embedded.
Industry:Weather
A departure from the long-term average state that is apparent in averages of a week or longer.
Industry:Weather
A defective maximum thermometer of the liquid-in-glass type in which the mercury flows too freely through the constriction. Such a thermometer will indicate a maximum temperature that is too low.
Industry:Weather
A decrease in the amplitude of a trough. In middle latitudes, it implies a poleward movement of an isopleth that defines a trough (i.e., height or thickness contour). It is the opposite of meridional or equatorward extension of a trough.
Industry:Weather
A day on which precipitation is observed. The minimum amount of precipitation considered necessary to constitute a precipitation day varies from country to country but is generally 0. 1 mm or 0. 01 in.
Industry:Weather
