CO2-animatedRahmen
Oxygen / Kalkstein

Sauerstoff ist mit 49,4 Gewichtsprozent das häufigste Element der Erdkruste und der Ozeane und mit 20,4 Gewichtsprozent in der Atmosphäre enthalten.

mol

H2O

CH4

CO2

NO2

SF6

ppm

~10000

1,8

395

0,32

--

stay

eternal

5a-10a

500a-1000a (flux)
2a (δ17O)

100a

3 Ka

climasens

3

20

1

300

23000

Januar 18, 2023

Scientists have long suspected that silicate weathering plays a major role in regulating the Earth’s carbon cycle. The mechanism of silicate weathering could provide a geologically constant force in keeping carbon dioxide — and global temperatures — in check. ‘Silikatverwitterung’.


Oxygen:
 Natürliche Isotope: 16O (99,76%); 18O (0,2%)
δ18O = 18/16 (Delta-O-18) ---> 5 angereichert=warm, 4 abgereichert=kalt
δ17O ---> 17O/16O ---> atmospheric CO2 = 0.33 ‰; soil, ocean, anthropogenic CO2 = 0.21 ‰

65_Myr_Climate_Change

atmospheric CO2      --->    CO2 δ17O = 0.326 ‰
meteoric water      --->    CO2 δ17O = 0.046 ‰
oceanic water       --->    CO2 δ17O = 0.000 ‰
anthropogenic       --->    CO2 δ17O = O.244 ‰
leaf water          --->    CO2 δ17O = 0,244 ‰
respiration         --->    CO2 δ17O = 0.244 ‰
soil                --->    CO2 δ17O = 0.244 ‰
 land terrestrial   --->    CO2 δ17O = 0.244 ‰
oceanic             --->    CO2 δ
17O = 0.284 ‰

Quelle: Mao-Chang Liang
Scientific RepoRts | 7: 13180   | DOI:10.1038/s41598-017-12774-w

Quelle:
https://commons.wikimedia.org/w/index.php?curid=466265

Modification of δ17O: combustion and isotope exchange with water. They produce CO2 with δ17O = 0.21‰, & air O2 = 0.21‰
The oxygen of near-surface CO2 in this region is primarily affected by biogeochemistry with minor influences from the stratosphere and human activities.
The atmospheric CO2
δ17O values vary from 0.216 to 0.415‰ with an average of 0.335‰. Difference=+30%.

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