scholarly journals Role of mixed layer depth in surface frontogenesis: The Agulhas Return Current front

2014 ◽  
Vol 41 (7) ◽  
pp. 2447-2453 ◽  
Author(s):  
Tomoki Tozuka ◽  
Meghan F. Cronin
Keyword(s):  
Mixed Layer ◽  
Mixed Layer Depth ◽  
Layer Depth ◽  
Return Current

A numerical study on the role of atmospheric forcing on mixed layer depth variability in the Bay of Bengal using a regional ocean model

2021 ◽  
Author(s):  
Sumit Dandapat ◽  
Arun Chakraborty ◽  
Jayanarayanan Kuttippurath ◽  
Chirantan Bhagawati ◽  
Radharani Sen
Keyword(s):  
Mixed Layer ◽  
Bay Of Bengal ◽  
Numerical Study ◽  
Mixed Layer Depth ◽  
Ocean Model ◽  
Atmospheric Forcing ◽  
Layer Depth ◽  
Regional Ocean Model

The role of the Leeuwin Current and mixed layer depth on the autumn phytoplankton bloom off Ningaloo Reef, Western Australia

2012 ◽  
Vol 32 ◽  
pp. 22-35 ◽  
Author(s):  
Cecile S.G. Rousseaux ◽  
Ryan Lowe ◽  
Ming Feng ◽  
Anya M. Waite ◽  
Peter A. Thompson
Keyword(s):  
Mixed Layer ◽  
Western Australia ◽  
Phytoplankton Bloom ◽  
Mixed Layer Depth ◽  
Layer Depth ◽  
Leeuwin Current ◽  
Ningaloo Reef

Role of upper mixed layer depth in forecasting contaminated sediment recovery rates

2005 ◽  
Vol 8 (1) ◽  
pp. 53-62 ◽  
Author(s):  
Todd M. Redder ◽  
Joseph V. DePinto ◽  
Hans P. Holmberg ◽  
John R. Wolfe
Keyword(s):  
Mixed Layer ◽  
Mixed Layer Depth ◽  
Contaminated Sediment ◽  
Layer Depth ◽  
Recovery Rates ◽  
Upper Mixed Layer

scholarly journals On the Emergence of the Atlantic Multidecadal SST Signal: A Key Role of the Mixed Layer Depth Variability Driven by North Atlantic Oscillation

2020 ◽  
Vol 33 (9) ◽  
pp. 3511-3531
Author(s):  
Ayako Yamamoto ◽  
Hiroaki Tatebe ◽  
Masami Nonaka
Keyword(s):  
Heat Flux ◽  
North Atlantic Oscillation ◽  
Mixed Layer ◽  
North Atlantic ◽  
Mixed Layer Depth ◽  
Vertical Component ◽  
Surface Heat ◽  
Ocean Dynamics ◽  
Layer Depth

AbstractDespite its wide-ranging potential impacts, the exact cause of the Atlantic multidecadal oscillation/variability (AMO/AMV) is far from settled. While the emergence of the AMO sea surface temperature (SST) pattern has been conventionally attributed to the ocean heat transport, a recent study showed that the atmospheric stochastic forcing is sufficient. In this study, we resolve this conundrum by partitioning the multidecadal SST tendency into a part caused by surface heat fluxes and another by ocean dynamics, using a preindustrial control simulation of a state-of-the-art coupled climate model. In the model, horizontal ocean heat advection primarily acts to warm the subpolar SST as in previous studies; however, when the vertical component is also considered, the ocean dynamics overall acts to cool the region. Alternatively, the heat flux term is primarily responsible for the subpolar North Atlantic SST warming, although the associated surface heat flux anomalies are upward as observed. Further decomposition of the heat flux term reveals that it is the mixed layer depth (MLD) deepening that makes the ocean less susceptible for cooling, thus leading to relative warming by increasing the ocean heat capacity. This role of the MLD variability in the AMO signature had not been addressed in previous studies. The MLD variability is primarily induced by the anomalous salinity transport by the Gulf Stream modulated by the multidecadal North Atlantic Oscillation, with turbulent fluxes playing a secondary role. Thus, depending on how we interpret the MLD variability, our results support the two previously suggested frameworks, yet slightly modifying the previous notions.

scholarly journals Decadal variability in the northeast Pacific in a physical-ecosystem model: Role of mixed layer depth and trophic interactions

2008 ◽  
Vol 113 (C2) ◽  
Author(s):  
Michael Alexander ◽  
Antonietta Capotondi ◽  
Arthur Miller ◽  
Fei Chai ◽  
Richard Brodeur ◽  
...  
Keyword(s):  
Mixed Layer ◽  
Trophic Interactions ◽  
Decadal Variability ◽  
Mixed Layer Depth ◽  
Ecosystem Model ◽  
Layer Depth ◽  
Northeast Pacific

scholarly journals The Annual Cycle of Upper-Ocean Potential Vorticity and its Relationship to Submesoscale Instabilities

2020 ◽  
Author(s):  
Xiaolong Yu ◽  
Alberto C. Naveira Garabato ◽  
Adrian P. Martin ◽  
David P. Marshall
Keyword(s):  
Mixed Layer ◽  
Potential Vorticity ◽  
Gravitational Instability ◽  
Mixed Layer Depth ◽  
Upper Ocean ◽  
Physical Processes ◽  
Layer Depth ◽  
Order Of Magnitude ◽  
Mixed Layers

AbstractThe evolution of upper-ocean potential vorticity (PV) over a full year in a typical mid-ocean area of the Northeast Atlantic is examined using submesoscale- and mesoscale-resolving hydrographic and velocity measurements from a mooring array. A PV budget framework is applied to quantitatively document the competing physical processes responsible for deepening and shoaling the mixed layer. The observations reveal a distinct seasonal cycle in upper-ocean PV, characterized by frequent occurrences of negative PV within deep (up to about 350 m) mixed layers in winter to mid spring, and positive PV beneath shallow (mostly less than 50 m) mixed layers during the remainder of the year. The cumulative positive and negative subinertial changes in the mixed layer depth, which are largely unaccounted for by advective contributions, exceed the deepest mixed layer by one order of magnitude, suggesting that mixed layer depth is shaped by the competing effects of de-stratifying and re-stratifying processes. Deep mixed layers are attributed to persistent atmospheric cooling in winter to mid spring, which triggers gravitational instability leading to mixed layer deepening. However, on shorter time scales of days, conditions favourable to symmetric instability often occur as winds intermittently align with transient frontal flows. The ensuing submesoscale frontal instabilities are found to fundamentally alter upper-ocean turbulent convection, and limit the deepening of the mixed layer in the winter-to-mid-spring period. These results emphasize the key role of submesoscale frontal instabilities in determining the seasonal evolution of the mixed layer in the open ocean.

Sign in / Sign up

Export Citation Format

Share Document