Matching Pairs Carbon storesOnline version Sizes of Carbon Stores by Raphael Heath 1 Atmosphere 2 Soils 3 Plants in oceans 4 Fossil fuels 5 Intermediate and deep oceans 6 Plants on land 7 sedimentary rocks 8 Earth's crust 9 Surface Ocean 38,000 Pg 3 Pg 1,000,000 Pg 5,000 to 10,000 Pg 750 Pg 560 to 610 Pg 1,500 Pg 100,000,000 Pg 725 - 970 Pg