Climate pathways behind phytoplankton-induced atmospheric warming
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Published:2022-01-14
Issue:1
Volume:19
Page:223-239
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ISSN:1726-4189
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Container-title:Biogeosciences
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language:en
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Short-container-title:Biogeosciences
Author:
Asselot RémyORCID, Lunkeit Frank, Holden Philip B.ORCID, Hense IngaORCID
Abstract
Abstract. We investigate the ways in which marine biologically mediated heating increases the surface atmospheric temperature. While the effects of phytoplankton light absorption on the ocean have gained attention over the past years, the impact of this biogeophysical mechanism on the atmosphere is still unclear. Phytoplankton light absorption warms the surface of the ocean, which in turn affects the air–sea heat and CO2 exchanges. However, the contribution of air–sea heat versus CO2 fluxes in the phytoplankton-induced atmospheric warming has not been yet determined. Different so-called climate pathways are involved. We distinguish heat exchange, CO2 exchange, dissolved CO2, solubility of CO2 and sea-ice-covered area. To shed more light on this subject, we employ the EcoGEnIE Earth system model that includes a new light penetration scheme and isolate the effects of individual fluxes. Our results indicate that phytoplankton-induced changes in air–sea CO2 exchange warm the atmosphere by 0.71 ∘C due to higher greenhouse gas concentrations. The phytoplankton-induced changes in air–sea heat exchange cool the atmosphere by 0.02 ∘C due to a larger amount of outgoing longwave radiation. Overall, the enhanced air–sea CO2 exchange due to phytoplankton light absorption is the main driver in the biologically induced atmospheric heating.
Publisher
Copernicus GmbH
Subject
Earth-Surface Processes,Ecology, Evolution, Behavior and Systematics
Reference47 articles.
1. Adloff, M., Greene, S. E., Parkinson, I. J., Naafs, B. D. A., Preston, W.,
Ridgwell, A., Lunt, D. J., Jiménez, J. M. C., and Monteiro, F. M.:
Unravelling the sources of carbon emissions at the onset of Oceanic
Anoxic Event (OAE) 1a, Earth Planet. Sci. Lett., 530,
115947, https://doi.org/10.1016/j.epsl.2019.115947, 2020. a 2. Alvarez, S. A., Gibbs, S. J., Bown, P. R., Kim, H., Sheward, R. M., and
Ridgwell, A.: Diversity decoupled from ecosystem function and resilience
during mass extinction recovery, Nature, 574, 242–245, 2019. a 3. Anderson, W., Gnanadesikan, A., Hallberg, R., Dunne, J., and Samuels, B.:
Impact of ocean color on the maintenance of the Pacific Cold Tongue,
Geophys. Res. Lett., 34, 11, https://doi.org/10.1029/2007GL030100, 2007. a, b 4. Armstrong McKay, D. I., Cornell, S. E., Richardson, K., and Rockström, J.: Resolving ecological feedbacks on the ocean carbon sink in Earth system models, Earth Syst. Dynam., 12, 797–818, https://doi.org/10.5194/esd-12-797-2021, 2021. a, b 5. Asselot, R., Lunkeit, F., Holden, P. B., and Hense, I.: The relative importance
of phytoplankton light absorption and ecosystem complexity in an Earth
system model, J. Adv. Model. Earth Sy., 13,
e2020MS002110, https://doi.org/10.1029/2020MS002110, 2021. a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s
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