Climate Change revision

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  • Created by: JJrugby
  • Created on: 22-04-15 09:39
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  • Climate Change
    • Evidence
      • Rocks
        • Rocks can be changed by climatic conditions and in environments that no longer exist
        • In Britain, coal was formed under hot, wet tropical conditions; sandstones were laid down during arid times; various limestones accumulated on the floors of warm seas; and glacial deposits were left behind by retreating ice sheets.
      • Fossil Landscapes
        • Produced by certain geomorpholo-gical processes which no longer operate
        • Glacially eroded highland in north and west Britain; granite tors on Dartmoor and wadis in deserts
      • Changes in sea level
        • Global sea levels have risen
      • Pollen analysis
        • Shows which plants were dominant at the time
      • Dendrochro-nology
        • Technique of obtaining a core from a tree-trunk and using it to determine the age of the tree
      • Chemical Methods
        • Thyis is the study of oxygen and carbon isotopes.
      • Historical Records
        • Vines growing successfully in Southern England between AD 1000 and 1300
        • Cave paintings of elephants in the middle of the sahara
        • graves for human burial in Greenland which were dug to a depth of 2m in the 13th century, but only 1m depth in the 14th century and could not be dug at all in the 15th century due to the extension of permafrost
        • Fairs held on the frozen River Thames in Tudor times
        • The measurement of recent advances and retreats of Alpine glaciers
    • Global Climate Drivers
      • Seasonality
        • Temperatures travel north and south throughout the year
      • Global Air Circulation
        • As most air falls, it condenses and forms precipitation
        • As air rises, it gets cooler
      • Continentality
        • Continents of land are hotter compared to the sea
        • Land heats up more than the sea
        • Places in the centre of continents get more variation in temperature
      • Insolation
        • The amount of incoming radiation from the sun affecting a place
        • The rays are spread out more in the north and south compared to on the equator
      • Thermohaline Ocean Current
        • They are convection currents
        • Currents caused by the density of the water
        • The saltier the water, the denser the water is, therefore causing it to sink
      • How different climates respond
        • Polar climate
          • The polar region receives the suns radiation over a large area so it's less concentrated. The reason for it being dry is that it receives dry air from the polar cell.
        • Deserts
          • Deserts receive dry air from the Hadley cell so they get very small amounts of rain. Due to them being close to the equator they receive very concentrated rays from the sun
        • Tropical rainforest
          • Along the equator, air rises and it causes an area of moist air that is also hot and humid due to the suns radiation
        • Marine West Coast
          • Rising warm air causes low pressure and a lot of rainfall. The temperature are moderated by the oceans that surround it.

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