carbon stores Flashcards
origin of carbon
earths interior
stored in mantle
escapes as constructive and destructive plat margins
co2 to atmosphere
dissolved oceans
held in biomass
what is biosphere
sum of a carbon in all living matter
560 billion tonnes / 0.00012%
varies place to place due to climate
- rainforest high NPP
main stores within biosphere
living vegetation - 19%
plant litter
soil humus
peat - 250Gtc
animals
atmospheric carbon
carbon stored in atmosphere as co2 or methane
750 billion tonnes / 0.0017%
has inc by 36% due anthropogenic sources driving global warming
highest level in 20million years
what has mauna loa observatory found
global annual mean conc atmospheric co2 inc from 280ppm in 1958 to 416ppm in 2020
due to anthropogenic
inc rate 2ppm/year
what is the hydrosphere
carbon dissolved in oceans
38000 billion tonnes
50X more than atmospheric
different layers ocean
Surface layer (euphotic zone) – photosynthesis 900Gtc
Intermediate (twilight zone) – deep layer 37000 Gtc
Living organic matter (fish plankton bacteria) and dissolved organic matter 30Gtc
Organisms die – sink deep water – decay and release co2
Material sink bottom – layers carbon rich sediments
what is lithosphere
carbon stored in marine sediments and sedimentary rocks
marine sediments + sedimentary rocks 100mill Gtc
Soil organic matter 1500Gtc
Fossil fuels 4100Gtc
Peat 250Gtc (drying out climate change so releasing carbon)
what is pedosphere
Uppermost part of lithosphere that reacts with atmosphere hydro and bio sphere
organic matter
what is recycling carbon needed for
food for plant and animals
energy source
