Global oceans - Meridional overturning circulation and heat transport in the Atlantic Ocean [in: State of the Climate in 2023]

Volkov, D. L.; Willis, J. K.; Hobbs, W.; Fu, Y.; Lozier, S. M.; Johns, W. E.; Smeed, D. A. ORCID: https://orcid.org/0000-0003-1740-1778; Moat, B. I. ORCID: https://orcid.org/0000-0001-8676-7779; Pita, I.; Goes, M.; Dong, S.; Smith, R. H.; Elipot, S.. 2024 Global oceans - Meridional overturning circulation and heat transport in the Atlantic Ocean [in: State of the Climate in 2023]. Bulletin of the American Meteorological Society, 105 (8). S191. https://doi.org/10.1175/BAMS-D-24-0100.1

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Official URL: http://dx.doi.org/10.1175/BAMS-D-24-0100.1

Abstract/Summary

The meridional overturning circulation (MOC) and meridional heat transport (MHT) are essential indicators of the state of the large-scale ocean circulation and Earth’s climate system. Most climate models and proxy-based reconstructions indicate that the Atlantic MOC may already be slowing down towards the end of this century in response to anthropogenic forcing (Weijer et al. 2020; Rahmstorf et al. 2015; Caesar et al. 2018, 2021). In this report, we provide updates on the MOC/MHT estimates across the Atlantic Ocean from the following observing platforms: 1) the Overturning in the Subpolar North Atlantic Program (OSNAP) array (Lozier et al. 2017), which consists of a West section from Canada to Greenland across the Labrador Sea and an East section from Greenland to Scotland, 2) the RAPID-Meridional Overturning Circulation and Heat-flux Array - Western Boundary Time Series (henceforth RAPID) array at ~26.5°N (Moat et al. 2023), and 3) from the combination of satellite and in situ data (synthetic MOC/MHT) at 41°N and at several latitudes in the South Atlantic (Fig. 3.21). As a highlight of this report, initial estimates indicate a record-high MOC/MHT at 41°N, albeit over a short (20-year) observational record.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1175/BAMS-D-24-0100.1
ISSN:	0003-0007
Date made live:	10 Oct 2024 12:44 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/538214

Item Type:

Publication - Article

Digital Object Identifier (DOI):

https://doi.org/10.1175/BAMS-D-24-0100.1

ISSN:

0003-0007

Date made live:

10 Oct 2024 12:44 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/538214