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JC GEOG

weather and atmosphere

TermDefinition
what is air nitrogen 78% oxygen 21% water vapour, carbon dioxide,ozone and other gasses 1%
radiation air close to the ground is heated by heat waves
convection warm air rises
conduction cool air is heated by contact with warm air
warm winds winds that blow towards the pole
cold winds winds that blow towards the equator
prevailing winds winds that blow regularly over a region
high pressure air that has cooled and gets heavier -presses down on the earth
low pressure air is heated and expands -becomes lighter less weight
the water cycle evaporation ,condensation,precipitation , runoff
convectional rainfall sun heats the ground,air expands gets lighter and rises,it cools condenses and forms clouds,=heavy showers of rain during hot spells
relief rainfall sea winds full of moisture,forced to rise over mountains , moisture cools, condenses and falls as rain
cyclonic rainfall cold polar air meets warm tropical air ,warm air is forced to rise quickly,it condenses forms clouds along warm and cold fronts ,rain falls
precipitation rain ,hail, sleet, snow
winds moving air.air moves from areas of high pressure to areas of low pressure
cause of ocean currents unequal heating of the sea at different latitudes - at the the poles the sea is cold -at the equator the sea is warm-water moves between warm and cold sea areas
atmospheric pressure the weight of air
to measure humidity hygrometer
to measure temperature thermometer maximum and minimum
to measure sunshine Cambell-Stokes recorder
to measure pressure mercury barometer, aneroid baremeter and a barograph
to measure rainfall rain guage
to measure the direction of wind wind vane
to measure the speed of wind anemometer
wind strength is measured by the Beaufort scale
a stephenon screen is used for holding a maximum and minimum thermometer and a wet and dry bulb thermometer
hectopascals/millibars measurment for pressure
isobar lines joining places of equal pressure
isotherm lines joining places of equal temperature
isohel lines joining places of equal sunshine
isohyet lines joining places of equal rainfall
Hurricane/Typhoon rototing masses of cloud
cyclones create warm and cold fronts over Ireland and Western Europe
a cold current Labrador current
a warm current north Atlantic drift
weather condition of the atmosphere over a short period of time
climate the condition of the atmosphere over a long period of time e.g 35 years
Created by: buckley19