Atmospheric measurements of the terrestrial O<sub>2</sub> : CO<sub>2</sub>  exchange ratio of a midlatitude forest

Battle, Mark O.; Munger, J. William; Conley, Margaret; Sofen, Eric; Perry, Rebecca; Hart, Ryan; Davis, Zane; Scheckman, Jacob; Woogerd, Jayme; Graeter, Karina; Seekins, Samuel; David, Sasha; Carpenter, John

doi:10.5194/acp-19-8687-2019

Articles | Volume 19, issue 13

https://doi.org/10.5194/acp-19-8687-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

The 10th International Carbon Dioxide Conference (ICDC10)...

https://doi.org/10.5194/acp-19-8687-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 13

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10 Jul 2019

Research article | Highlight paper |

| 10 Jul 2019

Atmospheric measurements of the terrestrial O₂ : CO₂ exchange ratio of a midlatitude forest

Mark O. Battle, J. William Munger, Margaret Conley, Eric Sofen, Rebecca Perry, Ryan Hart, Zane Davis, Jacob Scheckman, Jayme Woogerd, Karina Graeter, Samuel Seekins, Sasha David, and John Carpenter

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Sep 2025	149	20	5	174
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Apr 2021	58	6	0	64
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Jun 2021	60	8	0	68
Jul 2021	70	11	0	81
Aug 2021	47	12	1	60
Sep 2021	54	10	0	64
Oct 2021	46	34	0	80
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Dec 2021	45	11	1	57
Jan 2022	44	11	3	58
Feb 2022	39	11	2	52
Mar 2022	48	9	1	58
Apr 2022	43	5	2	50
May 2022	33	7	0	40
Jun 2022	35	7	0	42
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Oct 2024	41	9	1	51
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Dec 2024	35	8	1	44
Jan 2025	29	5	1	35
Feb 2025	38	11	0	49
Mar 2025	25	12	4	41
Apr 2025	18	15	1	34
May 2025	37	10	5	52
Jun 2025	73	27	1	101
Jul 2025	51	16	2	69
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Sep 2025	149	20	5	174
Oct 2025	37	23	0	60
Nov 2025	83	44	3	130
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Short summary

Predictions of global warming require predictions of how much CO₂ will be taken up by the oceans, how much by land plants, and how much will stay in the atmosphere. Measurements of atmospheric oxygen (O₂) help with these predictions if we also know the ratio of O₂ release to CO₂ uptake in land plants. We have measured this ratio in a midlatitude forest and find a lower value than the one in wide use. If truly applicable, our results call for a modest adjustment in the global carbon budget.


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Atmospheric measurements of the terrestrial O2 : CO2 exchange ratio of a midlatitude forest

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Atmospheric measurements of the terrestrial O₂ : CO₂ exchange ratio of a midlatitude forest