Monitoring conditions on earth

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  • Created by: EmmaSimmo
  • Created on: 19-10-17 20:03
Dendrochronology (PAST)
(Tree ring dating) is the scientific method of dating tree rings to the exact year they were formed. -analyse atmospheric conditions in different periods of time.
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Sediments from lake beds and seafloors (PAST)
These can be used and analysed as the climate in history is preserved within layers of sediments that slowly accumulate.
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Ice cores (thickness)(PAST)
-Thickness provides clues about local precipitation(thick layer means great snowfall). Layer thickness can also tell us about global temperatures as more snow accumulates at poles in global warm spells.
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Ice cores (air pockets)(PAST)
-Air pockets between grains become cut off from each other and produce bubbles in the ice. Gas bubbles provide data about atmospheric composition inc. concentration of greenhouse gases.
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Historical Records (PAST)
Lack numerical precision of modern methods but span a longer region of time.
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Fossil Pollen (PAST)
Different classes of plants produce pollen grains with different distinctive shapes. These pollen grains are often found preserved in sediment cores from ponds, lakes and oceans.They provide information of types of plants that grew nearby.
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Improved methods of ice core analysis (NOW)
Gas and isotope analysis of ice cores. Beryllium-10 concentrations, are an indirect indicator of solar activity. The ratio of concentrations of two isotopes of oxygen in the water molecules in ice serves as an indicator.
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Argo Floats (NOW)
More than 3500 Argo floats are in the sea. They gather information on temperature and salinity.
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Satellites (NOW)
Hundred of climate satellites send data to organisations .
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Atmospheric measurements (NOW)
Baseline air pollution stations around the world take measurements that are state-of-the-art in precision and accuracy. They are used to determine concentrations of gases and air pollutants. They can be used for weather, climate eg wind,rainfall
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Other cards in this set

Card 2

Front

These can be used and analysed as the climate in history is preserved within layers of sediments that slowly accumulate.

Back

Sediments from lake beds and seafloors (PAST)

Card 3

Front

-Thickness provides clues about local precipitation(thick layer means great snowfall). Layer thickness can also tell us about global temperatures as more snow accumulates at poles in global warm spells.

Back

Preview of the back of card 3

Card 4

Front

-Air pockets between grains become cut off from each other and produce bubbles in the ice. Gas bubbles provide data about atmospheric composition inc. concentration of greenhouse gases.

Back

Preview of the back of card 4

Card 5

Front

Lack numerical precision of modern methods but span a longer region of time.

Back

Preview of the back of card 5
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