Inferring deep ocean tidal energy dissipation from the global high-resolution data-assimilative HAMTIDE model

2014 ◽  
Vol 119 (7) ◽  
pp. 4573-4592 ◽  
Author(s):  
E. Taguchi ◽  
D. Stammer ◽  
W. Zahel
Keyword(s):  
Energy Dissipation ◽  
High Resolution ◽  
Deep Ocean ◽  
Tidal Energy ◽  
High Resolution Data ◽  
Tidal Energy Dissipation ◽  
Resolution Data

The Combined Effect of Tidally and Eddy-Driven Diapycnal Mixing on the Large-Scale Ocean Circulation

2012 ◽  
Vol 42 (4) ◽  
pp. 526-538 ◽  
Author(s):  
Oleg A. Saenko ◽  
Xiaoming Zhai ◽  
William J. Merryfield ◽  
Warren G. Lee
Keyword(s):  
Energy Dissipation ◽  
Ocean Circulation ◽  
General Circulation ◽  
Thermal Structure ◽  
Deep Ocean ◽  
Drake Passage ◽  
Tidal Energy ◽  
Diapycnal Mixing ◽  
Overturning Circulation ◽  
Tidal Energy Dissipation

Abstract Several recent studies have shown that ocean western boundaries are the primary regions of eddy energy dissipation. Globally, the eddy energy sinks have been estimated to integrate to about 0.2 TW. This is a sizable fraction of the tidal energy dissipation in the deep oceanic interior, estimated at about 1.0 TW and contributing to diapycnal mixing. The authors conduct sensitivity experiments with an ocean general circulation model assuming that the eddy energy is scattered into high-wavenumber vertical modes, resulting in energy dissipation and locally enhanced diapycnal mixing. When only the tidal energy dissipation maintains diapycnal mixing, the overturning circulation, and stratification in the deep ocean are too weak. With the addition of the eddy dissipation, the deep-ocean thermal structure becomes closer to that observed and the overturning circulation and stratification in the abyss become stronger. Furthermore, the mixing associated with the eddy dissipation can, on its own, drive a relatively strong overturning. The stratification and overturning in the deep ocean are sensitive to the vertical structure of diapycnal mixing. When most of this energy dissipates within 300 m above the bottom, the abyssal overturning and stratification are too weak. Allowing for the dissipation to penetrate higher in the water column, such as suggested by recent observations, results in stronger stratification and meridional circulation. Zonal circulation is also affected. In particular, the Drake Passage transport becomes closer to its observational estimates with the increase in the vertical scale for turbulence above topography. Consistent with some theoretical models, the Drake Passage transport increases with the increase in the mean upper-ocean diffusivity.

Using high resolution data to reveal depth-dependent mechanisms that drive land subsidence: The Venice coast, Italy

2009 ◽  
Vol 474 (1-2) ◽  
pp. 271-284 ◽  
Author(s):  
L. Tosi ◽  
P. Teatini ◽  
L. Carbognin ◽  
G. Brancolini
Keyword(s):  
High Resolution ◽  
Land Subsidence ◽  
High Resolution Data ◽  
Resolution Data

Estimating maize lethal necrosis (MLN) severity in Kenya using multispectral high-resolution data

2021 ◽  
Author(s):  
Kyalo Richard ◽  
Elfatih M. Abdel-Rahman ◽  
Sevgan Subramanian ◽  
Johnson O. Nyasani ◽  
Michael Thiel ◽  
...  
Keyword(s):  
High Resolution ◽  
High Resolution Data ◽  
Resolution Data

scholarly journals Separating Geophysical Signals Using GRACE and High‐Resolution Data: A Case Study in Antarctica

2018 ◽  
Vol 45 (22) ◽  
pp. 12,340-12,349 ◽  
Author(s):  
Olga Engels ◽  
Brian Gunter ◽  
Riccardo Riva ◽  
Roland Klees
Keyword(s):  
High Resolution ◽  
High Resolution Data ◽  
Resolution Data
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