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    The Relationship between United States East Coast Sea Level and the Atlantic Meridional Overturning Circulation: a Review


    Little, Christopher M and Hu, Aixue and Hughes, Chris W. and McCarthy, Gerard and Piecuch, Christopher G. and Ponte, Rui M. and Thomas, Matthew D. (2019) The Relationship between United States East Coast Sea Level and the Atlantic Meridional Overturning Circulation: a Review. Journal of Geophysical Research: Oceans, 124 (1). pp. 6435-6438. ISSN 2169-9291

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    Abstract

    Scientific and societal interest in the relationship between the Atlantic Meridional Overturning Circulation (AMOC) and U.S. East Coast sea level has intensified over the past decade, largely due to (1) projected, and potentially ongoing, enhancement of sea level rise associated with AMOC weakening and (2) the potential for observations of U.S. East Coast sea level to inform reconstructions of North Atlantic circulation and climate. These implications have inspired a wealth of model‐ and observation‐based analyses. Here, we review this research, finding consistent support in numerical models for an antiphase relationship between AMOC strength and dynamic sea level. However, simulations exhibit substantial along‐coast and intermodel differences in the amplitude of AMOC‐associated dynamic sea level variability. Observational analyses focusing on shorter (generally less than decadal) timescales show robust relationships between some components of the North Atlantic large‐scale circulation and coastal sea level variability, but the causal relationships between different observational metrics, AMOC, and sea level are often unclear. We highlight the importance of existing and future research seeking to understand relationships between AMOC and its component currents, the role of ageostrophic processes near the coast, and the interplay of local and remote forcing. Such research will help reconcile the results of different numerical simulations with each other and with observations, inform the physical origins of covariability, and reveal the sensitivity of scaling relationships to forcing, timescale, and model representation. This information will, in turn, provide a more complete characterization of uncertainty in relevant relationships, leading to more robust reconstructions and projections.

    Item Type: Article
    Additional Information: ©2019. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. Cite as: Little, C. M., Hu, A., Hughes, C. W., McCarthy, G. D., Piecuch, C. G., Ponte, R. M., & Thomas, M. D. (2019). The Relationship between U.S. East Coast sea level and the Atlantic Meridional Overturning Circulation: A review. Journal of Geophysical Research: Oceans, 124, 6435–6458. https://doi. org/10.1029/2019JC015152
    Keywords: Relationship; Between; U.S. East Coast Sea Level; Atlantic Meridional; Overturning; Circulation; Review;
    Academic Unit: Faculty of Social Sciences > Geography
    Faculty of Social Sciences > Research Institutes > Irish Climate Analysis and Research Units, ICARUS
    Item ID: 13985
    Identification Number: https://doi.org/10.1029/2019JC015152
    Depositing User: Gerard McCarthy
    Date Deposited: 11 Feb 2021 15:25
    Journal or Publication Title: Journal of Geophysical Research: Oceans
    Publisher: Wiley Online Library
    Refereed: Yes
    URI:

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