Fate of fossil fuel CO2 in geologic time
Abstract
A model of the ocean and seafloor carbon cycle is subjected to injection of new CO2 pulses of varying sizes to estimate the resident atmospheric fraction over the coming 100 kyr. The model is used to separate the processes of air‐sea equilibrium, an ocean temperature feedback, CaCO3 compensation, and silicate weathering on the residual anthropogenic pCO2 in the atmosphere at 1, 10, and 100 kyr. The mean lifetime of anthropogenic CO2 is dominated by the long tail, resulting in a range of 30–35 kyr. The long lifetime of fossil fuel carbon release implies that the anthropogenic climate perturbation may have time to interact with ice sheets, methane clathrate deposits, and glacial/interglacial climate dynamics.
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With a fixed ocean circulation and climatology, it is difficult to account for the importance of feedbacks with climate except in a highly parameterized manner.
“With a fixed ocean circulation and climatology it is difficult to account for the importance of feedbacks with climate except in a highly parameterized manner [Archer et al., 2004;Archer, 2005].”
From Regulation of atmospheric CO <sub>2</sub> by deep‐sea sediments in an Earth system model (2007) · cites this paper as Archer, 2005
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- Authors
- Archer, D.
- Affiliations
- University of Chicago (US)
- Corresponding author
- Archer, David
- ORCID
- Archer, David
- Venue
- Journal of Geophysical Research: Oceans
- Publisher
- American Geophysical Union (AGU)
- Published
- 2005-09
- Volume
- 110
- Issue
- C9
- ISSN
- 0148-0227 (ISSN-L)
- OpenAlex
- W2095636002
- Cited by
- 620
- References
- 4
- Citations by year
- 2026: 13 · 2025: 23 · 2024: 33 · 2023: 26 · 2022: 33 · 2021: 79 · 2020: 19 · 2019: 27 · 2018: 20 · 2017: 22 · 2016: 30 · 2015: 36 · 2014: 37 · 2013: 39 · 2012: 31
- FWCI
- 11.27
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Geophysical Research Atmospheres (publishedVersion)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Geology and Paleoclimatology Research
- Physical Sciences › Environmental Science › Global and Planetary Change › Climate variability and models
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine and coastal ecosystems
- Keywords
- fossil fuel CO2, ocean carbon cycle, air-sea CO2 flux, silicate weathering, ice sheets, methane hydrate
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