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the claim

Atmospheric carbon dioxide levels exhibit a distinct seasonal cycle driven by vegetation

the verdict
SUPPORTED
the evidence backs this
Recorded sources
3 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Atmospheric carbon dioxide levels show a clear seasonal cycle that is driven primarily by terrestrial vegetation growth and decay.

The analysis

The retrieved papers document the seasonal exchanges of carbon dioxide between the atmosphere and the terrestrial biosphere, supporting the well-established scientific consensus that seasonal vegetation dynamics drive fluctuations in atmospheric CO2 levels.

Evidence for · 3
Decadal trends in the seasonal-cycle amplitude of terrestrial CO2 exchange resulting from the ensemble of terrestrial biosphere models
Recorded source metadata

A. Ito, M. Inatomi, D. Huntzinger, C. Schwalm, A. Michalak, R. Cook, A. King, J. Mao, Yaxing Wei, W. M. Post, Weile Wang, M. A. Arain, Suo Huang, Daniel J. Hayes, D. Ricciuto, Xiaoying Shi, Maoyi Huang, H. Lei, H. Tian, Chaoqun Lu, Jia Yang, B. Tao, A. Jain, B. Poulter, S. Peng, P. Ciais, J. B. Fisher, N. Parazoo, K. Schaefer, C. Peng, N. Zeng, F. Zhao. Decadal trends in the seasonal-cycle amplitude of terrestrial CO2 exchange resulting from the ensemble of terrestrial biosphere models. 2016. https://doi.org/10.3402/tellusb.v68.28968

The paper discusses the seasonal-cycle amplitude of atmospheric CO2 and terrestrial ecosystem carbon exchange, noting how biosphere models simulate these seasonal patterns.

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More for · 2
New constraints of terrestrial and oceanic global gross primary productions from the triple oxygen isotopic composition of atmospheric CO2 and O2
Recorded source metadata

M. Liang, A. Laskar, E. Barkan, S. Newman, M. Thiemens, R. Rangarajan. New constraints of terrestrial and oceanic global gross primary productions from the triple oxygen isotopic composition of atmospheric CO2 and O2. 2023. https://doi.org/10.1038/s41598-023-29389-z

The paper notes the intimate coupling of the global carbon cycle with biosphere processes, highlighting annual and intra-annual seasonal variations driven by biological activity.

Seasonal stabilization effects slowed the greening of the Northern Hemisphere over the last two decades.
Recorded source metadata

Zhang W, Smith WK, Keenan TF, Dannenberg MP, Li Y, Wang S, Kimball JS, Moore DJP. Seasonal stabilization effects slowed the greening of the Northern Hemisphere over the last two decades.. 2025. https://doi.org/10.1038/s41467-025-61308-w

The paper examines seasonal growth patterns and vegetation dynamics in the Northern Hemisphere, which directly influence atmospheric carbon dioxide cycles.

The paper trail · every fact has a biography
first checked02 Aug 2026
judged → SUPPORTED · 8602 Aug 2026
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