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Annual march of temperature / annual temperature lag
Maximum solar radiation occurs in summer solstice. Maximum temperatures occur 1-2 months later. Lowest solar radiation occurs during winter solstice. Lowest temperatures ahppen 1-2 months later.
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Antarctic Circle
Latitude at 66 1/2 degrees N; the southern limit of the zone in the Sourthern Hemisphere that experiences a 24-hour period of sunlight and a 24-hour period of darkness at least once a year.
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Arctic / Antarctic Zones
23 1/2 to 66 1/2 degrees North and South; Cool to cold summer; -60, -70, -80 degrees; 24 hours of daylight during summer and 24 hours of darkness during winter
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Aphelion
position of Earth's orbit at farthest distance from the sun during each Earth revolution; July 4.
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Arctic Circle
latitude at 66 1/2 degrees North; the southern limit of the zone in the Northern Hemisphere that experiences 24 hours of sunlight and 24 hours of darkness at least once a year
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Calorie
Amount of heat necessary to raise the temperature of 1 gram of water to 1 degree Celsius
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Climate
Longtime average weather for an area
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Climatology
Scientific study of climates of Earth and their distribution
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Conduction
Transfer of heat within a body or between adjacent matter by means of internal molecular movement
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Continental Effect
Effect of landmasses on temperature to climate. Inland areas tend to experience extremes in temperatures
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Convection
Process by which circulation is produced within an air mass or fluid body
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Daily March of Temperature / Daily Temperature Lag
Solar radiation is maximum at noon but air temperature is highest 2-3 hours after noon.
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Electromagnetic Spectrum/Energy
Energy that comes from the sun; x-rays, gamma rays, uv light, visible light, infrared light, microwaves and radiowaves
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Equinox
One of two times each year when the position of the noon sun is overhead at the equator; day and night are equal in length worldwide; March 21-22, September 22-23
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Great Circle
Shortest distance between nay two places on Earth
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Greenhouse Effect
Shortwave radiation easily penetrates the atmosphere while longwave radiation is absorbed; thus, raising temperatures.
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International Dateline
Line along the 180 degree meridian, where each day begins and ends; it is always a day later west of the line than east of the line
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Isobar
Line drawn on a map to connect all points with the same atmospheric pressure
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Isohyet
Line on a map that connects points of equal precipitation
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Isotherm
Line that connects points of equal temperature
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Isopleth
Line on a map that connects points of equal value
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Latent heat of condensation
Energy release in the form of heat, as water is converted from vapor to the liquid state
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Mesosphere
35-50 Miles. Decreasing air temperature with increasing altitude.
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Northern/Southern Midlatitude Zone
from 23 1/2 to 66 1/2 degrees North and South; cool to cold winters; warm to hot summers.
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Normal Lapse Rate
Average temperature cahnge with increasing or decreasing temperature in the troposphere. 3.5degrees F/1000 ft.
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Parallelism
Tendency of the Earth's polar axis to remain parallel to itself at all positions in its orbit around the sun.
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Perihelion
Position of the Earth at closest distance to sun during each Earth revolution; Jan 3
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Plane of the Ecliptic
Plane of Earth's orbit around the sun and the apparent annual path of the sun along the stars
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Solar Constant
Each ray of sunlight has same amount of energy in it.
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Solstice
One of two times each year when the position of the noon sun is overhead at its farthest distance from the equator; this occurs when the sun is overhead at the Tropic of Cancer (June 21-22) and the Tropic of Capricorn (December 21-22)
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Specific Heat
Water: 1 calorie > 1 gram of H2O > 1 degree Celsius
Land:
- .25 Calorie > 1 gram of soil > 1 degree Celsius
- 1 calorie > gram soil > 4 degrees Celsius
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Temperature Gradient
Rate of change of temperature with distance in any direction from a given point; refers to rate of change horizontally; a vertical temperature gradient is referred to as the lapse rate
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Temperature Inversion
Reverse of the normal pattern of vertical distribution of air temperature; in the case of inversion, temperature increases rather than decreases with increasing altitude
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Tropical zone
0 degrees to 23 1/2 degrees North and South; Hot all year round; only zone that receives the subsolar point.
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Weather
Current or relatively recent atmospheric conditions in a specific moment in time
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