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climate change version 2
Transcript of climate change version 2
What is the greenhouse effect?
Is the greenhouse effect a good thing or a bad thing
Average temperature 14 degrees
Without greenhouse effect, - 19 degrees!
Average temperature 462 degrees!
Min -87 degrees
Max - 5 degrees
Carbon dioxide CO2
how did the scientist make carbon dioxide?
what was the temperature in the two bottles at the beginning of the experiment?
what was the temperature in each bottle at the end of the experiment?
why was the temperature different?
do you think this is a fair experiment?
can you remember any other gases that count as greenhouse gases?
What do we mean by "climate"?
All about the greenhouse effect
How are humans affecting the climate?
Studying past and current climates
Climate health check - what are we actually seeing?
rise in temperature
rise in sea level
melting of glaciers, ice sheets and thining of polar ice
warmer oceans - coral reef bleaching
Reduced snow cover, higher crop yields in some areas, more heatwaves (in cities which already experience them)
Loss of Amazonian forest, risk of major species loss, big changes in water availability
Increased risk of inland and coastal floods; glaciers retreat and reduced snow cover; extensive species losses; reduced crop production in southern Europe.
By 2020, between 75 and 250 million people exposed to increased water stress; production from farming reduced by up to 50% in some areas
Freshwater availability decreases in most parts of Asia by the 2050s; coastal areas at risk due to increased flooding; increased death rate from disease associated with floods and droughts expected to rise in some regions
Possible future impacts ...