METEOROLOGY Flashcards
A bar is a unit of pressure equivalent to:
1000 millibars
A countercurrent running north along the west coast of the United States from Northern California to Washington to at least 48 deg. Latitude during the winter months.
Davidson current
A diagram on a pilot chart consisting of a circle from which 8 or 16 lines emenate, one for each compass point wherein the length of each line is proportional to the frequency of wind from that direction,and the percentage of calms is entered at its cente
Wind Rose
A forecast of weather conditions for a period extending beyond three or more days from the day of issuance.
Extended Forecast
A front across which the characterisitics of temperature change and shift of winds are weak.
Diffuse front
A front at which the warm air descends the frontal surface is a:
Katafront
A front at which the warm air is ascending up the frontal surface up to high altitudes.
Anafront
A front presumed to exist within the equatorial trough separating the air of the Northern and Southern Hemispheres.
Intertropical front
A heavy cloud bank that appears on the horizon with the approach of an intense tropical cyclone.
Cloud Bar
A high pressure that may be completely encircled by an isobar is a:
Closed High
A large wave that rolls over or breaks on a beach or a reef is called:
comber
A large, faintly colored, circular arc formed by light (usually sunlight) falling on cloud or fog.
all of these
A line drawn on a weather chart having equal or constant temperature.
isotherm
A line drawn through all points on a chart having the same amount of cloudiness is called:
isoneph
A line drawn through all points on a isomagnetic chart having the same amount of magnetic variation.
isogonic
A line drawn through all points on the Earth’s surface having the same magnetic inclination is called:
isoclinic
A line joining geographical points of equal insolation during a specific interval of time.
isohel
A line on a chart connecting all points of equal salinity or constant salinity.
isohaline
A line on a given surface chart connecting points with equal wind speed.
isotach
A line on a weather chart connecting points of the same barometric tendencies.
isallobars
A long, well-defined wisps of cirrus clouds, thicker at one end than the other.
mare’s tails
A low pressure that may be completely encircled by an isobar is a:
Closed Low
A mass of air that is devoid or free of clouds or fog is called:
Clear air
A moderate to gale-force southeasterly wind in the Persian Gulf accompanied by gloomy weather, rain and squalls.
Sharki