Articles | Volume 12, issue 20
https://doi.org/10.5194/bg-12-6017-2015
https://doi.org/10.5194/bg-12-6017-2015
Research article
 | 
22 Oct 2015
Research article |  | 22 Oct 2015

Quantifying the influence of CO2 seasonality on future aragonite undersaturation onset

T. P. Sasse, B. I. McNeil, R. J. Matear, and A. Lenton

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Cited articles

Archer, D., Kheshgi, H., Maier, and Reimer, E.: Multiple timescales for neutralization of fossil fuel CO2, Geophys. Res. Lett., 24, 405–408, https://doi.org/10.1029/97gl00168, 1997.
Aumont, O. and Bopp, L.: Globalizing results from ocean in situ iron fertilization studies, Global Biogeochem. Cy., 20, GB2017, https://doi.org/10.1029/2005gb002591, 2006.
Bednarsek, N., Tarling, G. A., Bakker, D. C. E., Fielding, S., Jones, E. M., Venables, H. J., Ward, P., Kuzirian, A., Leze, B., Feely, R. A., and Murphy, E. J.: Extensive dissolution of live pteropods in the Southern Ocean, Nat. Geosci., 5, 881–885, https://doi.org/10.1038/ngeo1635, 2012.
Berner, R. A. and Honjo, S.: Pelagic Sedimentation of Aragonite: Its Geochemical Significance, Science, 211, 940–942, https://doi.org/10.1126/science.211.4485.940, 1981.
Bopp, L., Resplandy, L., Orr, J. C., Doney, S. C., Dunne, J. P., Gehlen, M., Halloran, P., Heinze, C., Ilyina, T., Séférian, R., Tjiputra, J., and Vichi, M.: Multiple stressors of ocean ecosystems in the 21st century: projections with CMIP5 models, Biogeosciences, 10, 6225–6245, https://doi.org/10.5194/bg-10-6225-2013, 2013.
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Our results show that accounting for oceanic CO2 seasonality is crucial to projecting the future onset of critical ocean acidification levels (i.e. aragonite undersaturation). In particular, seasonality will bring forward the initial onset of month-long undersaturation by a global average of 17 years. Importantly, widespread undersaturation is projected to occur once atmospheric CO2 reaches 496ppm in the North Pacific and 511ppm in the Southern Ocean, independent of emissions scenario.
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