A warm air mass that forms in the tropics and has low air pressure
polar air mass
A cold air mass that forms north of 50° north latitude and south of 50° south latitude and has high air pressure
maritime air mass
A humid air mass that forms over oceans
continental air mass
A dry air mass that forms over land
(meteorology) the atmospheric phenomenon created at the boundary between two different air masses
forms when cold air moves under warm air which is less dense and pushes air up (produces thunderstorms heavy rain or snow)
faster-moving warm air collides with cold air and rises over the cold air; bring warm, humid weather
when a warm air mass and a cold air mass meet and no movement occurs
a front that forms when a cold air mass overtakes a warm air mass and lifts the warm air mass off the ground and over another air mass
(meteorology) rapid inward circulation of air masses about a low-pressure center
An atmospheric condition of high central pressure, with currents flowing outward.
a violent disturbance in the atmosphere
a small storm often accompanied by heavy precipitation and frequent thunder and lightning
Are thunderclouds and are likely to generate lightning, hail and fierce convection currents.
the flash of light that accompanies an electric discharge in the atmosphere (or something resembling such a flash)
a localized and violently destructive windstorm occurring over land characterized by a funnel-shaped cloud extending toward the ground
A severe storm that develops over tropical oceans and whose strong winds of more than 120 km/h spiral in toward the intensely low-pressure storm center
a dome of water that sweeps across the coast where a hurricane lands
the removal of persons or things from an endangered area
scientists who study the causes of weather and try to predict it
Satellites used to record temperature, cloud cover, precipitation, etc.
lines joining places on the map that have the same air pressure
lines that connect points that have the same temperature
the weather in some location averaged over some long period of time
climate within a small area that differs significantly from the climate of the surrounding area
near the equator, between 23.5 degrees North and 23.5 degrees South latitudes
the region between 66.5 degrees north and south latitudes and the poles; the sun's rays strike at a very small angle in this zone
the area between the tropical and polar zones, from about 23.5 degrees to 66.5 degrees north and 23.5 degrees to 66.5 degrees south latitudes
the climate of an area near an ocean or large lake. Such an area has mostly mild winters and cool summers.
The climate of the centers of continents with cold winters and warm or hot summers
the side facing away from the wind. by the time the prevailing winds reach the top of the mountain, they have lost most of their mositure in the form of precipitation. relatively dry air moves down the leeward side of the mountain.
the side that faces toward the wind. receives a great deal of precipitation. has a wet climate on this side.
a seasonal wind pattern in southern Asia that blows warm, moist air from the southwest during the summer, bringing heavy rains, and cold, dry air from the northeast during the winter
main climate regions
tropical rainy, dry, temperate marine, temperate continental, polar, and highlands.
dense forest that receives high amounts of rain each year
a region of grassland with scattered trees lying between the equatorial forest and the hot deserts in either hemisphere
A type of biome characterized by low moisture levels and infrequent and unpredictable precipitation. Daily and seasonal temperatures fluctuate widely
the term used for the temperate grassland region in the Northern Hemisphere.
hot, rainy summers and mild Winters with some rain
Weather pattern characterized by severely cold, bitter winters and short, cool summers.
Treeless arctic or alpine biome characterized by cold, harsh winters, a short growing season, and potential for frost any month of the year; vegetation includes low-growing perennial plants, mosses and lichens
permanently frozen layer of soil beneath the surface of the ground
any period of time during which glaciers covered a large part of the earth's surface
causes of climate change
variations in the position of earth relative to the sun, changes in the sun's energy output, major volcanic eruptions, movement of the continents
areas on the sun's surface that are cooler and less bright than surrounding areas, are caused by the sun's magnetic field, and occur in cycles
the name given to the periodic warming of the ocean that occurs in the central and eastern Pacific
a cooling of the ocean surface off the western coast of South America, occurring periodically every 4 to 12 years and affecting Pacific and other weather patterns.
an increase in the average temperature of the earth's atmosphere (especially a sustained increase that causes climatic changes)
Gases in the earth's lower atmosphere (troposphere) that cause the greenhouse effect. Examples are carbon dioxide, chlorofluorocarbons, ozone, methane, water vapor, and nitrous oxide.
group of chemical compounds used in refrigerators, air conditioners, foam packaging, and aerosol sprays that may enter the atmosphere and destroy ozone