Document Type
Article
Publication Date
2016
Keywords
Physical oceanography
Digital Object Identifier (DOI)
https://doi.org/10.1038/ncomms10525
Abstract
The Atlantic Meridional Overturning Circulation (AMOC) is an important component of ocean thermohaline circulation. Melting of Greenland’s ice sheet is freshening the North Atlantic; however, whether the augmented freshwater flux is disrupting the AMOC is unclear. Dense Labrador Sea Water (LSW), formed by winter cooling of saline North Atlantic water and subsequent convection, is a key component of the deep southward return flow of the AMOC. Although LSW formation recently decreased, it also reached historically high values in the mid-1990s, making the connection to the freshwater flux unclear. Here we derive a new estimate of the recent freshwater flux from Greenland using updated GRACE satellite data, present new flux estimates for heat and salt from the North Atlantic into the Labrador Sea and explain recent variations in LSW formation. We suggest that changes in LSW can be directly linked to recent freshening, and suggest a possible link to AMOC weakening.
Rights Information
This work is licensed under a Creative Commons Attribution 4.0 License.
Was this content written or created while at USF?
Yes
Citation / Publisher Attribution
Nature Communications, v. 7, art. 10525
Scholar Commons Citation
Yang, Qian; Dixon, Tim; Myers, Paul G.; Bonin, Jennifer; Chambers, Don; van den Broeke, M.R.; Ribergaard, Mads H.; and Mortensen, John, "Recent Increases in Arctic Freshwater Flux Affects Labrador Sea Convection and Atlantic Overturning Circulation" (2016). School of Geosciences Faculty and Staff Publications. 1094.
https://digitalcommons.usf.edu/geo_facpub/1094
Comments
A Corrigendum to this article was published on 17 November 2016