Standard

Harvard

APA

Vancouver

Author

BibTeX

@article{3db183bcc47e402190073f6380786967,
title = "On the interplay between downwelling, deep convection and mesoscale eddies in the Labrador Sea",
abstract = "In this study, an idealized eddy-resolving model is employed to examine the interplay between the downwelling, ocean convection and mesoscale eddies in the Labrador Sea and the spreading of dense water masses. The model output demonstrates a good agreement with observations with regard to the eddy field and convection characteristics. It also displays a basin mean net downwelling of 3.0 Sv. Our analysis confirms that the downwelling occurs near the west Greenland coast and that the eddies spawned from the boundary current play a major role in controlling the dynamics of the downwelling. The magnitude of the downwelling is positively correlated to the magnitude of the applied surface heat loss. However, we argue that this connection is indirect: the heat fluxes affect the convection properties as well as the eddy field, while the latter governs the Eulerian downwelling. With a passive tracer analysis we show that dense water is transported from the interior towards the boundary, predominantly towards the Labrador coast in shallow layers and towards the Greenland coast in deeper layers. The latter transport is steered by the presence of the eddy field. The outcome that the characteristics of the downwelling in a marginal sea like the Labrador Sea depend crucially on the properties of the eddy field emphasizes that it is essential to resolve the eddies to properly represent the downwelling and overturning in the North Atlantic Ocean, and its response to changing environmental conditions.",
keywords = "Atlantic Meridional Overturning Circulation, Deep convection, Downwelling, Labrador Sea, Mesoscale eddy, Surface forcing",
author = "Sotiria Georgiou and {van der Boog}, {Carine G.} and Nils Br{\"u}ggemann and Ypma, {Stefanie L.} and Pietrzak, {Julie D.} and Katsman, {Caroline A.}",
note = "Accepted Author Manuscript",
year = "2019",
doi = "10.1016/j.ocemod.2019.02.004",
language = "English",
volume = "135",
pages = "56--70",
journal = "Ocean Modelling",
issn = "1463-5003",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - On the interplay between downwelling, deep convection and mesoscale eddies in the Labrador Sea

AU - Georgiou, Sotiria

AU - van der Boog, Carine G.

AU - Brüggemann, Nils

AU - Ypma, Stefanie L.

AU - Pietrzak, Julie D.

AU - Katsman, Caroline A.

N1 - Accepted Author Manuscript

PY - 2019

Y1 - 2019

N2 - In this study, an idealized eddy-resolving model is employed to examine the interplay between the downwelling, ocean convection and mesoscale eddies in the Labrador Sea and the spreading of dense water masses. The model output demonstrates a good agreement with observations with regard to the eddy field and convection characteristics. It also displays a basin mean net downwelling of 3.0 Sv. Our analysis confirms that the downwelling occurs near the west Greenland coast and that the eddies spawned from the boundary current play a major role in controlling the dynamics of the downwelling. The magnitude of the downwelling is positively correlated to the magnitude of the applied surface heat loss. However, we argue that this connection is indirect: the heat fluxes affect the convection properties as well as the eddy field, while the latter governs the Eulerian downwelling. With a passive tracer analysis we show that dense water is transported from the interior towards the boundary, predominantly towards the Labrador coast in shallow layers and towards the Greenland coast in deeper layers. The latter transport is steered by the presence of the eddy field. The outcome that the characteristics of the downwelling in a marginal sea like the Labrador Sea depend crucially on the properties of the eddy field emphasizes that it is essential to resolve the eddies to properly represent the downwelling and overturning in the North Atlantic Ocean, and its response to changing environmental conditions.

AB - In this study, an idealized eddy-resolving model is employed to examine the interplay between the downwelling, ocean convection and mesoscale eddies in the Labrador Sea and the spreading of dense water masses. The model output demonstrates a good agreement with observations with regard to the eddy field and convection characteristics. It also displays a basin mean net downwelling of 3.0 Sv. Our analysis confirms that the downwelling occurs near the west Greenland coast and that the eddies spawned from the boundary current play a major role in controlling the dynamics of the downwelling. The magnitude of the downwelling is positively correlated to the magnitude of the applied surface heat loss. However, we argue that this connection is indirect: the heat fluxes affect the convection properties as well as the eddy field, while the latter governs the Eulerian downwelling. With a passive tracer analysis we show that dense water is transported from the interior towards the boundary, predominantly towards the Labrador coast in shallow layers and towards the Greenland coast in deeper layers. The latter transport is steered by the presence of the eddy field. The outcome that the characteristics of the downwelling in a marginal sea like the Labrador Sea depend crucially on the properties of the eddy field emphasizes that it is essential to resolve the eddies to properly represent the downwelling and overturning in the North Atlantic Ocean, and its response to changing environmental conditions.

KW - Atlantic Meridional Overturning Circulation

KW - Deep convection

KW - Downwelling

KW - Labrador Sea

KW - Mesoscale eddy

KW - Surface forcing

UR - http://www.scopus.com/inward/record.url?scp=85061621821&partnerID=8YFLogxK

U2 - 10.1016/j.ocemod.2019.02.004

DO - 10.1016/j.ocemod.2019.02.004

M3 - Article

VL - 135

SP - 56

EP - 70

JO - Ocean Modelling

T2 - Ocean Modelling

JF - Ocean Modelling

SN - 1463-5003

ER -

ID: 51679651