Origins and Store of Carbon on Earth (AQA A-Level Geography): Flashcards
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Carbon sink definition
Carbon sink definition
Store that absorbs more carbon than it releases
What GtC stands for
What GtC stands for
Gigatonne of carbon equivalent (one billion tonnes)
Largest carbon store on Earth
Largest carbon store on Earth
Ocean (37,000-40,000 GtC)
Soil carbon pool vs atmospheric pool ratio
Soil carbon pool vs atmospheric pool ratio
3.1 times larger
Current atmospheric CO2 concentration
Current atmospheric CO2 concentration
0.04% or 400 ppm
Year Mauna Loa CO2 measurements began
Year Mauna Loa CO2 measurements began
1958
Pre-industrial CO2 levels (ppm)
Pre-industrial CO2 levels (ppm)
280 ppm
Name of graph showing CO2 increase since 1958
Name of graph showing CO2 increase since 1958
Keeling Curve
Weathering: CO2 + H2O forms
Weathering: CO2 + H2O forms
H2CO3 (carbonic acid)
Timescale geological processes control atmospheric CO2
Timescale geological processes control atmospheric CO2
Hundreds of millions of years