nerc.ac.uk

Local and downstream relationships between Labrador Sea Water volume and North Atlantic meridional overturning circulation variability

Li, Feili; Lozier, M. Susan; Danabasoglu, Gokhan; Holliday, N. Penny ORCID: https://orcid.org/0000-0002-9733-8002; Kwon, Young-Oh; Romanou, Anastasia; Yeager, Steve G.; Zhang, Rong. 2019 Local and downstream relationships between Labrador Sea Water volume and North Atlantic meridional overturning circulation variability. Journal of Climate, 32 (13). 3883-3898. https://doi.org/10.1175/JCLI-D-18-0735.1

Before downloading, please read NORA policies.
[img]
Preview
Text
© Copyright 11/06/2019 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act or that satisfies the conditions specified in Section 108 of the U.S. Copyright Act (17 USC §108) does not require the AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a website or in a searchable database, or other uses of this material, except as exempted by the above statement, requires written permission or a license from the AMS. All AMS journals and monograph publications are registered with the Copyright Clearance Center (http://www.copyright.com). Questions about permission to use materials for which AMS holds the copyright can also be directed to permissions@ametsoc.org. Additional details are provided in the AMS Copyright Policy statement, available on the AMS website (http://www.ametsoc.org/CopyrightInformation).
jcli-d-18-0735.1.pdf - Published Version

Download (2MB) | Preview

Abstract/Summary

While it has generally been understood that the production of Labrador Sea Water (LSW) impacts the Atlantic meridional overturning circulation (MOC), this relationship has not been explored extensively nor validated against observations. To explore this relationship, a suite of global ocean and ocean–sea-ice models forced by the same interannually-varying atmospheric dataset, varying in resolution from non-eddy-permitting to eddy-permitting (1°–1/4°), is analyzed to investigate the local and downstream relationships between LSW formation and the MOC on interannual to decadal time scales. While all models display a strong relationship between changes in the LSW volume and the MOC in the Labrador Sea, this relationship degrades considerably downstream of the Labrador Sea. In particular, there is no consistent pattern among the models in the North Atlantic subtropical basin over interannual to decadal time scales. Furthermore, the strong response of the MOC in the Labrador Sea to LSW volume changes in that basin may be biased by the overproduction of LSW in many models compared to observations. This analysis shows that changes in LSW volume in the Labrador Sea cannot be clearly and consistently linked to a coherent MOC response across latitudes over interannual to decadal time scales in ocean hindcast simulations of the last half-century. Similarly, no coherent relationships are identified between the MOC and the Labrador Sea mixed layer depth or the density of newly formed LSW across latitudes or across models over interannual to decadal time scales.

Item Type: Publication - Article
Digital Object Identifier (DOI): https://doi.org/10.1175/JCLI-D-18-0735.1
ISSN: 0894-8755
Date made live: 13 May 2019 16:21 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/523300

Actions (login required)

View Item View Item

Document Downloads

Downloads for past 30 days

Downloads per month over past year

More statistics for this item...