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Published on 9 October 2023
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Qiu,J. (2023). Analysis on the relationship between short-term variability and the weakening AMOC. Theoretical and Natural Science,7,1-6.
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Analysis on the relationship between short-term variability and the weakening AMOC

Junqi Qiu *,1,
  • 1 Ocean College, Zhejiang University

* Author to whom correspondence should be addressed.

https://doi.org/10.54254/2753-8818/7/20230104

Abstract

The Atlantic Meridional Overturning Circulation (AMOC) is a vital component of the global climate system, playing a crucial role in transporting heat and salinity from the equator to the North Atlantic, which in turn keeps Europe significantly warmer than other regions at the same latitude. Despite the fact that long-term observations and models have demonstrated an AMOC slowdown in response to global warming since the industrial revolution, detecting this slowdown in the brief observational record has proven to be challenging. In this study, the author investigates the relationship between short-term variability and the weakening AMOC by analyzing satellite remote sensing data of sea surface salinity collected over a decade. As a consequence of global warming, the weakened AMOC transports less heat and salt from the equator to sub-polar regions, causing heat and salt anomalies. This evidence further corroborates the slowing of the AMOC in response to human-caused warming and emphasizes the variability on a scale of half a decade caused by the deceleration.

Keywords

Atlantic Meridional Overturning Circulation (AMOC), satellite remote sensing, sea surface salinity, short-term variability

[1]. Kostov, Y., Armour, K. C., and Marshall, J., Impact of the Atlantic meridional overturning circulation on ocean heat storage and transient climate change, Geophys. Res. Lett., 41, 2108– 2116, (2014)

[2]. Sévellec, F., Fedorov, A. & Liu, W. Arctic sea-ice decline weakens the Atlantic Meridional Overturning Circulation. Nature Clim Change 7, 604–610 (2017).

[3]. Polyakov, I.V., Alexeev, V.A., Bhatt, U.S. et al. North Atlantic warming: patterns of long-term trend and multidecadal variability. Clim Dyn 34, 439–457 (2010).

[4]. Caesar, L., McCarthy, G.D., Thornalley, D.J.R. et al. Current Atlantic Meridional Overturning Circulation weakest in last millennium. Nat. Geosci. 14, 118–120 (2021).

[5]. Chen, X., Tung, KK. Global surface warming enhanced by weak Atlantic overturning circulation. Nature 559, 387–391 (2018).

[6]. IPCC: Summary for Policymakers. In Climate Change 2021: Te Physical Science Basis (eds Masson-Delmotte, V. et al.) (Cambridge Univ. Press, in the press).(2021)

[7]. Booth, B. B. B., Dunstone, N. J., Halloran, P. R., Andrews, T. & Bellouin, N. Aerosols implicated as a prime driver of twentieth-century North Atlantic climate variability. Nature 484, 228–232 (2012).

[8]. Menary, M. B. et al. Aerosol‐forced AMOC changes in CMIP6 historical simulations. Geophys. Res. Lett, (2020).

[9]. Jackson, L.C., Biastoch, A., Buckley, M.W. et al. The evolution of the North Atlantic Meridional Overturning Circulation since 1980. Nat Rev Earth Environ 3, 241–254 (2022). https://doi.org/10.1038/s43017-022-00263-2

[10]. Latif M, Sun J, Visbeck M, et al. Natural variability has dominated Atlantic Meridional Overturning Circulation since 1900[J]. Nature Climate Change, 2022, 12(5): 455-460.

[11]. Zhu, C., Liu, Z. Weakening Atlantic overturning circulation causes South Atlantic salinity accumulation. Nat. Clim. Chang. 10, 998–1003 (2020). https://doi.org/10.1038/s41558-020-0897-7

[12]. T. Meissner, F. J. Wentz, A. Manaster, R. Lindsley, M. Brewer, M. Densberger, 2022: Remote Sensing Systems SMAP Ocean Surface Salinities [Level 2C, Level 3 Running 8- day, Level 3 Monthly], Version 5.0 validated release. Remote Sensing Systems, Santa Rosa, CA, USA. Available online at www.remss.com/missions/smap, doi: 10.5067/SMP50- 3SMCS.

Cite this article

Qiu,J. (2023). Analysis on the relationship between short-term variability and the weakening AMOC. Theoretical and Natural Science,7,1-6.

Data availability

The datasets used and/or analyzed during the current study will be available from the authors upon reasonable request.

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About volume

Volume title: Proceedings of the 2023 International Conference on Environmental Geoscience and Earth Ecology

Conference website: https://www.icegee.org/
ISBN:978-1-83558-015-8(Print) / 978-1-83558-016-5(Online)
Conference date: 27 August 2023
Editor:Florian Nuţă
Series: Theoretical and Natural Science
Volume number: Vol.7
ISSN:2753-8818(Print) / 2753-8826(Online)

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