- 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, ...
Longwave radiation originating by thermal emission from the earth's surface and/or its atmosphere; to be distinguished from solar radiation.
Industry:Weather
Long narrow sheets of warm air rising from a heated surface. These are also called microfronts because of the rapid temperature changes measured when these advect past fixed sensors. Updraft curtains are surface layer phenomena that gradually merge and change shape into boundary layer thermals as they rise higher into the mixed layer.
Industry:Weather
Level sea ice more than eight inches thick and less than one year old; the stage that follows young ice.
Industry:Weather
Large (roughly 300 km diameter) anticyclonically rotating eddies found in the slope waters to the north of the Gulf Stream, containing Sargasso Sea water in their core. They persist for several months, being trapped in the region between the Gulf Stream and the continental slope, occasionally interacting with the Gulf Stream and getting destroyed in the process. A warm-core ring is formed from a large-amplitude Gulf Stream meander that pinches off to the north, trapping relatively warm Sargasso Sea water from south of the Gulf Stream within its circumferential current. Compare cold-core rings; see Gulf Stream rings.
Industry:Weather
Lands transitional between terrestrial and aquatic systems, where the water table is usually at or near the surface, or where the land is covered by shallow water. Wetlands must have one or more of three attributes: 1) at least periodically, the land supports predominantly hydrophytes; 2) the substrate is predominantly undrained hydric soil; 3) the subsoil is not soil and is saturated with water or covered by shallow water at some time during the growing season of each year.
Industry:Weather
Landmark (building, church tower, house, hill, screen of trees, etc. ) that is a known distance from the observing station and is used in determining visibility.
Industry:Weather
Issued when the risk of a hazardous weather or hydrologic event has increased significantly but its occurrence, location, and/or timing is still uncertain. It is intended to provide enough lead time so that those who need to set their plans in motion can do so. Compare warning, weather advisory.
Industry:Weather
Issued when a hazardous weather or hydrologic event is occurring, is imminent, or has a very high probability of occurring. A warning is used for conditions posing a threat to life or property. Compare watch, weather advisory.
Industry:Weather
Interface between soil that is unchanged from the initial state and the newly wetted zone from an infiltration or irrigation event.
Industry:Weather
Isobars that display a pronounced “V” or kinked shape due to local increases in pressure gradients, which are typically found in the vicinity of strong fronts.
Industry:Weather
