Meteorology Vocab
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| low-pressure system that develops in or near the province of alberts in winter and moves rapidly east or southeast through Canada and/or the US laying a swath of light snow | Alberta Clipper
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| instrument used to measure wind speed | anemometer
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| distance above sea level | altitude
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| the layer of gases, water, and particles surrounding earth | atmosphere
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| high clouds (usually above 16,000 feet) composed of ice crystals | cirrus
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| releasing small, solid particles of carbon dioxide or silver iodide into cool clouds that are heavy with moisture. Moisture may form around the particles causing rain or snow | cloud seeding
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| change in state of water from gas to a liquid | condensation
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| movement of heat through liquids and gases by currents | convection
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| cloud in the shape of individually detached white fluffy domes with a flat base; also know as fair-weather clouds | cumulus cloud
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| temperature at which water vapor in the air condenses to a liquid | dew point
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| warming of the tropical pacific ocean surface waters producing warm currents along the coasts of central and south america, which sometimes are associated with significant changes in cirulation over the northern hemisphere | el Nino
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| change in state of water from a liquid to a gas | evaporation
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| area of contact and transition between two air masses usually of different temperatures; | front
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| trapping and building up of heat by some gases in the atmosphere | greenhouse effect
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| brief suddent increase in wind speed | gust
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| amount of water vapor in the atmosphere | humidity
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| period of summerlike weather in autumn which follows a period of cool weather that has been accompanied by the first frost | Indian summer
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| temperature increases with altitude; | inversion
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| line on a weather map that connects points of equal sea-level barometric pressure | isobar
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| cooling of tropical pacific surface waters, sometimes associated with weather of the northern hemisphere | La Nina
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| science that investigates the atmosphere, its interactions, and its processes | meteorology
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| NMC | national meteorological center
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| NOAA | National oceanic and atmospheric administration; the national weather service is a part of NOAA, which is a part of US department of commerce
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| form of oxygen composed of 3 atoms per molecule; in the upper atmosphere it filters much of the harmful ultraviolet radiation from the sun; in the lower atmosphere it is a pollutant created by a chemical reaction with sunlight and auto emissions | ozone
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| water in liquid or solid form, that falls from the atmosphere to the ground | precipitation
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| amount of water vapor in the air compareed with the total amount of water vapor that air can hold at that temperature, if it were saturated; expressed as a % | relative humidity
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| transition zone between air masses of two different temperatures that are moving slowly or not at all | stationary front
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| regular rise and fall of earth's surface water caused by gravitational attraction by the moon | tides
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| water in the form of mist in the air when below the boiling point (rather than steam in the air from boiling water) | water vapor
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