scholarly journals A Modeling Study of Interannual Variability of Bay of Bengal Mixing and Barrier Layer Formation

2018 ◽  
Vol 123 (6) ◽  
pp. 3962-3981 ◽  
Author(s):  
Vinu Valsala ◽  
Shikha Singh ◽  
Sridhar Balasubramanian
Keyword(s):  
Interannual Variability ◽  
Barrier Layer ◽  
Bay Of Bengal ◽  
Layer Formation ◽  
Modeling Study

Seasonal and Interannual Variability in the Barrier Layer of the Bay of Bengal

2018 ◽  
Vol 123 (2) ◽  
pp. 1001-1015 ◽  
Author(s):  
Anshu Kumari ◽  
S. Prasanna Kumar ◽  
Arun Chakraborty
Keyword(s):  
Interannual Variability ◽  
Barrier Layer ◽  
Bay Of Bengal ◽  
Seasonal And Interannual Variability

Observations of barrier layer formation in the Bay of Bengal during summer monsoon

2002 ◽  
Vol 107 (C12) ◽  
pp. SRF 19-1-SRF 19-9 ◽  
Author(s):  
P. N. Vinayachandran ◽  
V. S. N. Murty ◽  
V. Ramesh Babu
Keyword(s):  
Summer Monsoon ◽  
Barrier Layer ◽  
Bay Of Bengal ◽  
Layer Formation

scholarly journals A modeling study of processes controlling the Bay of Bengal sea surface salinity interannual variability

2016 ◽  
Vol 121 (12) ◽  
pp. 8471-8495 ◽  
Author(s):  
V. P. Akhil ◽  
M. Lengaigne ◽  
J. Vialard ◽  
F. Durand ◽  
M. G. Keerthi ◽  
...  
Keyword(s):  
Interannual Variability ◽  
Bay Of Bengal ◽  
Sea Surface ◽  
Sea Surface Salinity ◽  
Surface Salinity ◽  
Modeling Study

Interdiffusion and barrier layer formation in thermally evaporated Mn/Cu heterostructures on SiO2 substrates

2011 ◽  
Vol 98 (12) ◽  
pp. 123112 ◽  
Author(s):  
J. G. Lozano ◽  
S. Lozano-Perez ◽  
J. Bogan ◽  
Y. C. Wang ◽  
B. Brennan ◽  
...  
Keyword(s):  
Barrier Layer ◽  
Layer Formation

scholarly journals Mechanisms of Barrier Layer Formation and Erosion from In Situ Observations in the Bay of Bengal

2019 ◽  
Vol 49 (5) ◽  
pp. 1183-1200 ◽  
Author(s):  
Jenson V. George ◽  
P. N. Vinayachandran ◽  
V. Vijith ◽  
V. Thushara ◽  
Anoop A. Nayak ◽  
...  
Keyword(s):  
Time Series ◽  
Barrier Layer ◽  
Bay Of Bengal ◽  
High Salinity ◽  
Layer Structure ◽  
Surface Mixed Layer ◽  
Study Region ◽  
In Situ Observations ◽  
Differential Advection

AbstractDuring the Bay of Bengal (BoB) Boundary Layer Experiment (BoBBLE) in the southern BoB, time series of microstructure measurements were obtained at 8°N, 89°E from 4 to 14 July 2016. These observations captured events of barrier layer (BL) erosion and reformation. Initially, a three-layer structure was observed: a fresh surface mixed layer (ML) of thickness 10–20 m; a BL below of 30–40-m thickness with similar temperature but higher salinity; and a high salinity core layer, associated with the Summer Monsoon Current. Each of these three layers was in relative motion to the others, leading to regions of high shear at the interfaces. However, the destabilizing influence of the shear regions was not enough to overcome the haline stratification, and the three-layer structure was preserved. A salinity budget using in situ observations suggested that during the BL erosion, differential advection brought high salinity surface waters (34.5 psu) with weak stratification to the time series location and replaced the three-layer structure with a deep ML (~60 m). The resulting weakened stratification at the time series location then allowed atmospheric wind forcing to penetrate deeper. The turbulent kinetic energy dissipation rate and eddy diffusivity showed elevated values above 10−7 W kg−1 and 10−4 m2 s−1, respectively, in the upper 60 m. Later, the surface salinity decreased again (33.8 psu) through differential horizontal advection, stratification became stronger and elevated mixing rates were confined to the upper 20 m, and the BL reformed. A 1D model experiment suggested that in the study region, differential advection of temperature–salinity characteristics is essential for the maintenance of BL and to the extent to which mixing penetrates the water column.

scholarly journals Response of the Salinity-Stratified Bay of Bengal to Cyclone Phailin

2019 ◽  
Vol 49 (5) ◽  
pp. 1121-1140 ◽  
Author(s):  
Dipanjan Chaudhuri ◽  
Debasis Sengupta ◽  
Eric D’Asaro ◽  
R. Venkatesan ◽  
M. Ravichandran
Keyword(s):  
Barrier Layer ◽  
Bay Of Bengal ◽  
Sea Surface ◽  
Density Stratification ◽  
Upper Ocean ◽  
Dimensional Model ◽  
Cyclone Track ◽  
Surface Salinity ◽  
Near Surface ◽  
One Dimensional

AbstractCyclone Phailin, which developed over the Bay of Bengal in October 2013, was one of the strongest tropical cyclones to make landfall in India. We study the response of the salinity-stratified north Bay of Bengal to Cyclone Phailin with the help of hourly observations from three open-ocean moorings 200 km from the cyclone track, a mooring close to the cyclone track, daily sea surface salinity (SSS) from Aquarius, and a one-dimensional model. Before the arrival of Phailin, moored observations showed a shallow layer of low-salinity water lying above a deep, warm “barrier” layer. As the winds strengthened, upper-ocean mixing due to enhanced vertical shear of storm-generated currents led to a rapid increase of near-surface salinity. Sea surface temperature (SST) cooled very little, however, because the prestorm subsurface ocean was warm. Aquarius SSS increased by 1.5–3 psu over an area of nearly one million square kilometers in the north Bay of Bengal. A one-dimensional model, with initial conditions and surface forcing based on moored observations, shows that cyclone winds rapidly eroded the shallow, salinity-dominated density stratification and mixed the upper ocean to 40–50-m depth, consistent with observations. Model sensitivity experiments indicate that changes in ocean mixed layer temperature in response to Cyclone Phailin are small. A nearly isothermal, salinity-stratified barrier layer in the prestorm upper ocean has two effects. First, near-surface density stratification reduces the depth of vertical mixing. Second, mixing is confined to the nearly isothermal layer, resulting in little or no SST cooling.

scholarly journals A modeling study of the processes of surface salinity seasonal cycle in the Bay of Bengal

2014 ◽  
Vol 119 (6) ◽  
pp. 3926-3947 ◽  
Author(s):  
V. P. Akhil ◽  
Fabien Durand ◽  
Matthieu Lengaigne ◽  
Jérôme Vialard ◽  
M. G. Keerthi ◽  
...  
Keyword(s):  
Bay Of Bengal ◽  
Seasonal Cycle ◽  
Surface Salinity ◽  
Modeling Study
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