scholarly journals Intraseasonal mixed‐layer heat budget in the equatorial Atlantic during the cold tongue development in 2006

2013 ◽  
Vol 118 (2) ◽  
pp. 650-671 ◽  
Author(s):  
Hervé Giordani ◽  
Guy Caniaux ◽  
Aurore Voldoire
Keyword(s):  
Mixed Layer ◽  
Heat Budget ◽  
Cold Tongue ◽  
Equatorial Atlantic ◽  
Mixed Layer Heat Budget

scholarly journals Diapycnal heat flux and mixed layer heat budget within the Atlantic Cold Tongue

2014 ◽  
Vol 43 (11) ◽  
pp. 3179-3199 ◽  
Author(s):  
Rebecca Hummels ◽  
Marcus Dengler ◽  
Peter Brandt ◽  
Michael Schlundt
Keyword(s):  
Heat Flux ◽  
Mixed Layer ◽  
Heat Budget ◽  
Cold Tongue ◽  
Mixed Layer Heat Budget ◽  
Atlantic Cold Tongue

scholarly journals A model study of the seasonal mixed layer heat budget in the equatorial Atlantic

2006 ◽  
Vol 111 (C6) ◽  
Author(s):  
Anne-Charlotte Peter ◽  
Matthieu Le Hénaff ◽  
Yves du Penhoat ◽  
Christophe E. Menkes ◽  
Frédéric Marin ◽  
...  
Keyword(s):  
Mixed Layer ◽  
Heat Budget ◽  
Equatorial Atlantic ◽  
Model Study ◽  
Mixed Layer Heat Budget

scholarly journals Intraseasonal Modulation of the Surface Cooling in the Gulf of Guinea

2013 ◽  
Vol 43 (2) ◽  
pp. 382-401 ◽  
Author(s):  
Julien Jouanno ◽  
Frédéric Marin ◽  
Yves du Penhoat ◽  
Jean-Marc Molines
Keyword(s):  
Mixed Layer ◽  
Gravity Waves ◽  
Heat Budget ◽  
Vertical Shear ◽  
Upper Ocean ◽  
Equatorial Waves ◽  
Gulf Of Guinea ◽  
The Core ◽  
Mixed Layer Heat Budget ◽  
Inertia Gravity Waves

Abstract A regional numerical model of the tropical Atlantic Ocean and observations are analyzed to investigate the intraseasonal fluctuations of the sea surface temperature at the equator in the Gulf of Guinea. Results indicate that the seasonal cooling in this region is significantly shaped by short-duration cooling events caused by wind-forced equatorial waves: mixed Rossby–gravity waves within the 12–20-day period band, inertia–gravity waves with periods below 11 days, and equatorially trapped Kelvin waves with periods between 25 and 40 days. In these different ranges of frequencies, it is shown that the wave-induced horizontal oscillations of the northern front of the mean cold tongue dominate the variations of mixed layer temperature near the equator. But the model mixed layer heat budget also shows that the equatorial waves make a significant contribution to the mixed layer heat budget through modulation of the turbulent cooling, especially above the core of the Equatorial Undercurrent (EUC). The turbulent cooling variability is found to be mainly controlled by the intraseasonal modulation of the vertical shear in the upper ocean. This mechanism is maximum during periods of seasonal cooling, especially in boreal summer, when the surface South Equatorial Current is strongest and between 2°S and the equator, where the presence of the EUC provides a background vertical shear in the upper ocean. It applies for the three types of intraseasonal waves. Inertia–gravity waves also modulate the turbulent heat flux at the equator through vertical displacement of the core of the EUC in response to equatorial divergence and convergence.

Estimating uncertainties on a Gulf Stream mixed-layer heat budget from stochastic modeling

2015 ◽  
Vol 150 ◽  
pp. 66-79 ◽  
Author(s):  
Nadia K. Ayoub ◽  
Marc Lucas ◽  
Pierre De Mey
Keyword(s):  
Stochastic Modeling ◽  
Mixed Layer ◽  
Gulf Stream ◽  
Heat Budget ◽  
Mixed Layer Heat Budget

scholarly journals Simulated Seasonal and Interannual Variability of the Mixed Layer Heat Budget in the Northern Indian Ocean*

2007 ◽  
Vol 20 (13) ◽  
pp. 3249-3268 ◽  
Author(s):  
Clémentde Boyer Montégut ◽  
Jérôme Vialard ◽  
S. S. C. Shenoi ◽  
D. Shankar ◽  
Fabien Durand ◽  
...  
Keyword(s):  
Heat Flux ◽  
Indian Ocean ◽  
Interannual Variability ◽  
Latent Heat Flux ◽  
Mixed Layer ◽  
Heat Budget ◽  
Northern Indian Ocean ◽  
Solar Heat ◽  
Mixed Layer Heat Budget ◽  
Solar Heat Flux

Abstract A global ocean general circulation model (OGCM) is used to investigate the mixed layer heat budget of the northern Indian Ocean (NIO). The model is validated against observations and shows fairly good agreement with mixed layer depth data in the NIO. The NIO has been separated into three subbasins: the western Arabian Sea (AS), the eastern AS, and the Bay of Bengal (BoB). This study reveals strong differences between the western and eastern AS heat budget, while the latter basin has similarities with the BoB. Interesting new results on seasonal time scales are shown. The penetration of solar heat flux needs to be taken into account for two reasons. First, an average of 28 W m−2 is lost beneath the mixed layer over the year. Second, the penetration of solar heat flux tends to reduce the effect of solar heat flux on the SST seasonal cycle in the AS because the seasons of strongest flux are also seasons with a thin mixed layer. This enhances the control of SST seasonal variability by latent heat flux. The impact of salinity on SST variability is demonstrated. Salinity stratification plays a clear role in maintaining a high winter SST in the BoB and eastern AS while not in the western AS. The presence of freshwater near the surface allows heat storage below the surface layer that can later be recovered by entrainment warming during winter cooling (with a winter contribution of +2.1°C in the BoB). On an interannual time scale, the eastern AS and BoB are strongly controlled by the winds through the latent heat flux anomalies. In the western AS, vertical processes, as well as horizontal advection, contribute significantly to SST interannual variability, and the wind is not the only factor controlling the heat flux forcing.

scholarly journals Multidecadal-scale adjustment of the ocean mixed layer heat budget in the tropics: examining ocean reanalyses

2017 ◽  
Vol 50 (5-6) ◽  
pp. 1513-1532 ◽  
Author(s):  
Kerry H. Cook ◽  
Edward K. Vizy ◽  
Xiaoming Sun
Keyword(s):  
Mixed Layer ◽  
Heat Budget ◽  
Ocean Mixed Layer ◽  
Ocean Reanalyses ◽  
Mixed Layer Heat Budget ◽  
The Tropics
Sign in / Sign up

Export Citation Format

Share Document