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18 terms

Earth & Space Science set #9

STUDY
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Meteorology
a scientist who studies the atmosphere using various instruments, computers, and models to make weather maps and forecasts
Precipitation
water in the solid or liquid form that falls to the Earth's surface from clouds
Weather
the state at a given place and time regarding heat, cloudiness, relative humidity, sunshine, wind, precipitation, etc.
Climate
the weather conditions prevailing in an area over a long period of time.
Freezing Rain/Drizzle
rain or drizzle that freezes on contact with the Earth's surface. Results when rain or drizzle falls from a mild layer aloft into a shallow layer of below freezing water.
Sleet
partially melted snowflakes that refreeze prior to striking the Earth's surface. Results when partially melted snowflakes fall from a mild layer aloft into a deep layer of below freezing air.
Snow
a type of precipitation that consists of an assemblage of ice crystals. Results when temperatures remain below freezing from the cloud all the way to the ground.
Rain
precipitation that consists of water droplets from 1-6mm in diameter. May result when temps. are above freezing from the cloud to the ground or when snow falling from a cloud melts as it encounters warm air.
Drizzle
precipitation that consists of water droplets from 0.2-0.5mm in diameter. May result when temps. are above freezing from the cloud to the ground or when snow falling from a cloud melts as it encounters warm air.
Wave Cyclone
low pressure weather (storm) systems that occur in the middle latitudes of the Earth (outside the tropics) that are connected with the fronts and horizontal gradients in temperature and dew point producing anything from cloudiness and mild showers to heavy gales and thunderstorms. Air is rising and winds are counterclockwise around this type of system.
Anticyclone
a large-scale circulation of winds around a central region of high atmospheric pressure clockwise in the Northern Hemisphere. Air sinks within this type of system.
Isobar
a line that connects points of equal atmospheric pressure on a weather map.
Station Model
in weather forecasting, a cluster of meteorological data plotted on a map indicating the weather information at a particular reporting station.
Surface Map
a special type of weather map that provides a view of weather elements over a geographical area at a specified time based on information from ground-based weather stations. These maps are created by plotting or tracing the values of relevant quantities such as sea level pressure, temperature, and cloud cover onto a geographical map to help find features such as weather fronts.
Forecast
a prediction or estimate of future atmospheric conditions.
Model
a representation of a system often times on a smaller scale that can be used to help simplify and/or make predictions.
Anemometer
an instrument used to measure wind speed.
Wind vane
an instrument used to measure wind direction.