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CLIMATE CHANGE
MADE BY :-NIKHIL SANGLE
SIDDHARTH MENON
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WHAT IS CLIMATE CHANGE ?The most general definition of climate change is a change in the statistical properties of the climate system when considered over long periods of time, regardless of cause
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FACTORS CAUSING CLIMATE CHANGE
Ocean variability
Plate tectonics
Human influences
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OCEAN VARIABILITY
The ocean is a fundamental part of the climate system, some changes in it occurring at longer timescales than in the atmosphere, massing hundreds of times more and having very high thermal inertia.
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TECTONIC PLATES
Over the course of millions of years, the motion of tectonic plates reconfigures global land and ocean areas and generates topography. This can affect both global and local patterns of climate and atmosphere-ocean circulation.
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HUMAN INFLUENCES
The scientific consensus on climate change is "that climate is changing and that these changes are in large part caused by human activities.
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EVIDENCES OF CLIMATE CHANGE
Glaciers
Vegetation
Pollen analysis
Precipitation
Dendroclimatology
Ice cores
Sea level change
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GLACIERS
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VEGETATION
A change in the type, distribution and coverage of vegetation may occur given a change in the climate.
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POLLEN ANALYSIS
Changes in the type of pollen found in different layers of sediment in lakes, bogs, or river deltas indicate changes in plant communities.Palynology is used to infer the geographical distribution of plant species, which vary under different climate conditions.
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PRECIPITATION
Climatological temperatures substantially affect precipitation. For instance, during the Last Glacial Maximum of 18,000 years ago, thermal-driven evaporation from the oceans onto continental landmasses was low, causing large areas of extreme desert, including polar deserts (cold but with low rates of precipitation).
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DENDROCHRONOLOGY
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ICE CORES
The air trapped in bubbles in the ice can also reveal the CO2 variations of the atmosphere from the distant past, well before modern environmental influences
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SEA LEVEL CHANGE
With the increase in melting of ice sheets and glaciers, the global sea level has risen recently with a much greater pace than expected .
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EFFECTS OF CLIMATE CHANGETemperature changes
Extreme weather
Biogeochemical cycles
Glacier retreat and disappearance
Acidification
Sea level rise
Ozone depletion
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EXTREME WEATHER
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GLACIAL DECREASE
1950
2000
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Ozone depletion
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HOW TO PREVENT CLIMATE CHANGE ?
Recycle, reduce and reuse various minerals.
Do not import food materials as it consumes less fuel.
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Use cycles for shorter distances over fuel consuming vehicles.
Use CFLs’ over traditional bulbs to conserve energy.
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THANK YOU
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