scholarly journals Atmospheric forcing during active convection in the Labrador Sea and its impact on mixed-layer depth

2016 ◽  
Vol 121 (9) ◽  
pp. 6978-6992 ◽  
Author(s):  
Lena M. Schulze ◽  
Robert S. Pickart ◽  
G. W. K. Moore
Keyword(s):  
Mixed Layer ◽  
Mixed Layer Depth ◽  
Labrador Sea ◽  
Atmospheric Forcing ◽  
Layer Depth ◽  
Active Convection

scholarly journals The Influence of High-Frequency Atmospheric Forcing on the Circulation and Deep Convection of the Labrador Sea

2015 ◽  
Vol 28 (12) ◽  
pp. 4980-4996 ◽  
Author(s):  
Amber M. Holdsworth ◽  
Paul G. Myers
Keyword(s):  
Mixed Layer ◽  
High Frequency ◽  
North Atlantic Ocean ◽  
Deep Convection ◽  
Mixed Layer Depth ◽  
Meridional Overturning Circulation ◽  
Labrador Sea ◽  
Atmospheric Forcing ◽  
The North ◽  
Average Maximum

Abstract The influence of high-frequency atmospheric forcing on the circulation of the North Atlantic Ocean with emphasis on the deep convection of the Labrador Sea was investigated by comparing simulations of a coupled ocean–ice model with hourly atmospheric data to simulations in which the high-frequency phenomena were filtered from the air temperature and wind fields. In the absence of high-frequency atmospheric forcing, the strength of the Atlantic meridional overturning circulation and subpolar gyres was found to decrease by 25%. In the Labrador Sea, the eddy kinetic energy decreased by 75% and the average maximum mixed layer depth decreased by between 20% and 110% depending on the climatology. In particular, high-frequency forcing was found to have a greater impact on mixed layer deepening in moderate to warm years whereas in relatively cold years the temperatures alone were enough to facilitate deep convection. Additional simulations in which either the wind or temperature was filtered revealed that the wind, through its impact on the bulk formulas for latent and sensible heat, had a greater impact on deep convection than the temperature.

scholarly journals The Black Sea Mixed Layer Depth Variability and Its Relation to the Basin Dynamics and Atmospheric Forcing

2019 ◽  
Vol 35 (5) ◽  
Author(s):  
A. A. Kubryakov ◽  
V. N. Belokopytov ◽  
A. G. Zatsepin ◽  
S. V. Stanichny ◽  
V. B. Piotukh ◽  
...  
Keyword(s):  
Black Sea ◽  
Mixed Layer ◽  
Mixed Layer Depth ◽  
The Black Sea ◽  
Atmospheric Forcing ◽  
Layer Depth

scholarly journals Lateral Heat Exchange after the Labrador Sea Deep Convection in 2008

2014 ◽  
Vol 44 (12) ◽  
pp. 2991-3007 ◽  
Author(s):  
Weiwei Zhang ◽  
Xiao-Hai Yan
Keyword(s):  
Heat Flux ◽  
Mixed Layer ◽  
Deep Convection ◽  
Mixed Layer Depth ◽  
Labrador Sea ◽  
Boundary Current ◽  
Strong Fluctuation ◽  
Layer Depth ◽  
Ensemble Mean ◽  
Lateral Heat

Abstract The mechanisms through which convected water restratifies in the Labrador Sea are still under debate. The Labrador Sea restratification after deep convection in the 2007/08 winter is studied with an eddy-resolving numerical model. The modeled mixed layer depth during wintertime resembles the Argo observed mixed layer very well, and the lateral heat flux during the subsequent restratification is in line with observations. The Irminger rings (IRs) are reproduced with fresher caps above the 300-m depths, and they are identified and tracked automatically. The model underestimates both the number of IRs in the convection area and the heat they carry. The underestimation is most likely caused by the errors in the direction of the west Greenland currents in the model, which causes more IRs propagating westward, and only the IRs originating south of 61.5°N are able to propagate southward, yet with speed much slower than observed speed. The model still observed three eddies propagating into the convection area during the restratification phase in 2008, and their thermal contribution ranges from 1% to 4% if the estimation is made at the time when they enter the convection area. If all newly generated eddies are considered, then the ensemble-mean contributions by the IRs become 5.3%. The more detailed and direct heat flux by IRs is difficult to derive because of the strong fluctuation of the identified eddy radius. Nevertheless, the modeled lateral heat flux is largely composed of the boundary current eddies and convective eddies, thus it is possible for the model to maintain an acceptable thermal balance.

scholarly journals The Black Sea Mixed Layer Depth Variability and Its Relation to the Basin Dynamics and Atmospheric Forcing

2019 ◽  
Vol 26 (5) ◽  
Author(s):  
A. A. Kubryakov ◽  
V. N. Belokopytov ◽  
A. G. Zatsepin ◽  
S. V. Stanichny ◽  
V. B. Piotukh ◽  
...  
Keyword(s):  
Black Sea ◽  
Mixed Layer ◽  
Mixed Layer Depth ◽  
The Black Sea ◽  
Atmospheric Forcing ◽  
Layer Depth

scholarly journals The role of local atmospheric forcing on the modulation of the ocean mixed layer depth in reanalyses and a coupled single column ocean model

2016 ◽  
Vol 47 (9-10) ◽  
pp. 2991-3010 ◽  
Author(s):  
Byju Pookkandy ◽  
Dietmar Dommenget ◽  
Nicholas Klingaman ◽  
Scott Wales ◽  
Christine Chung ◽  
...  
Keyword(s):  
Mixed Layer ◽  
Mixed Layer Depth ◽  
Ocean Model ◽  
Atmospheric Forcing ◽  
Ocean Mixed Layer ◽  
Layer Depth ◽  
Single Column ◽  
Ocean Mixed Layer Depth

Interannual variability of the Tropical Indian Ocean mixed layer depth

2012 ◽  
Vol 40 (3-4) ◽  
pp. 743-759 ◽  
Author(s):  
M. G. Keerthi ◽  
M. Lengaigne ◽  
J. Vialard ◽  
C. de Boyer Montégut ◽  
P. M. Muraleedharan
Keyword(s):  
Indian Ocean ◽  
Interannual Variability ◽  
Mixed Layer ◽  
Mixed Layer Depth ◽  
Tropical Indian Ocean ◽  
Ocean Mixed Layer ◽  
Layer Depth ◽  
Ocean Mixed Layer Depth

scholarly journals Summertime increases in upper-ocean stratification and mixed-layer depth

Nature ◽  
2021 ◽  
Vol 591 (7851) ◽  
pp. 592-598
Author(s):  
Jean-Baptiste Sallée ◽  
Violaine Pellichero ◽  
Camille Akhoudas ◽  
Etienne Pauthenet ◽  
Lucie Vignes ◽  
...  
Keyword(s):  
Mixed Layer ◽  
Mixed Layer Depth ◽  
Upper Ocean ◽  
Layer Depth ◽  
Ocean Stratification
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