Exploring the upper ocean

Tandon Laboratory at UMass Dartmouth

Month: April 2022

Caique is a Master of Science in Physical Oceanography!

Caique joined the group years ago as an MS student from the University of São Paulo (Prof. Silveira’s group). He investigated the effect of mesoscale eddies and topography generating submesoscale eddies in the Brazil Current’s domain. He successfully defended his thesis the last Friday (Apr 29th, 2022). Both prof. Tandon and prof. Buckingham was on his thesis committee. For his next steps, Caique is joining Scripps to pursue his Ph.D.

Ersen’S Joseph ’22: Intertwining mechanical engineering & oceanography

Ersen’S is featured on the university website! Do give it a read.


https://www.umassd.edu/engineering/features/ersens-joseph.html

Members of Tandon Lab present at Ocean Sciences Meeting 2022

Prof Amit Tandon and the rest of the lab had strong participation in the recently concluded Ocean Sciences Meeting-2022. Originally planned to be in Hawaii, the pandemic forced the organizers (AGU, ASLO, TOS) to make the event virtual. Spread across 7 days in February and March, it was definitely a good experience for the group to be a part of this event by presenting their published/on-going work as well as attending lots of other talks from a plethora of topics being discussed. Following are the details of the talks either given by the lab members or with Prof Tandon as a co-author.

1) Topographically-Generated Submesoscale Shear Instabilities associated with Brazil Current Meanders: Caique Luko

2) Diurnal Warm Layers in the Bay of Bengal during Monsoon 2019: Siddhant Kerhalkar

3) Atmospheric Cold Pools in the Bay of Bengal: Iury T.Simoes Sousa

4) Dynamics of a Baroclinically-unstable Meander and its Ecological Impacts: Filipe Pereira

5) Validation of a Hybrid Co-ordinate Ocean Model (HYCOM) in the Eastern Tropical North Pacific Oxygen Deficient Zone: Valentina Guinta

6) Next steps toward understanding Arabian Sea dynamics and ecology: Amit Tandon

7) Energy Exchange Between Internal Gravity Waves and Balanced Flow: Wave Action Conservation and a pathway to Dissipation:  Eric Kunze (with Amit Tandon)

8) Reabsorption of Lee-Wave Energy in Bottom-Intensified Currents: Yue Wu (with Amit Tandon)

9) Incorporating irreversible fluxes in K-e mixing model for Bay of Bengal: Shikha Singh (with Amit Tandon)

10) Characteristics and Variability of Air-sea fluxes in Bay of Bengal from OMNI Buoy Measurements: Jossia Joseph (with Amit Tandon)

11) Wave Induced Stokes Drift from a decade of Moored Buoy Observations in the Bay of Bengal: Kalyani M (with Amit Tandon).

Along with these 11 talks, Prof Tandon was also a session chair for the session “PL04- Indian Ocean circulation and its impact on air-sea interactions, biogeochemistry and ecology”.

 

 

 

 

“Effects of the seasonality of mesoscale eddies on the planktonic dynamics off eastern Brazil” published in DAO

A paper by Caique Luko (an M.S student from University of São Paulo co-advised by Prof. Tandon)  titled  “Effects of the seasonality of mesoscale eddies on the planktonic dynamics off eastern Brazil” has been published in Dynamics of Atmosphere and Ocean with Prof. Tandon and Filipe Pereira (a PhD candidate from the USP-UMassD dual-degree program) as some of the co-authors of the paper. This study was aimed to understand if the seasonality of these mesoscale eddies affects the regional phytoplankton annual cycle. To achieve that, the authors analyzed chlorophyll-a satellite observations and performed two experiments using a Nutrients-Phytoplankton-Zooplankton (NPZ) model coupled to a 1 and a 1/2 -layer Quasi-Geostrophic model.

The results reveal that the phytoplankton annual cycle off eastern Brazil is mainly controlled by the seasonally varying advection of material offshore caused by the mesoscale eddies. Such mechanism may represent an important source of material to the tropical oligotrophic ocean. More on this study could be found here.

Congratulations Caique, Filipe and Prof Tandon!!

Horizontal distributions of the streamlines and the Chl-a obtained in: (1 st row) Satellite observations; (2 nd row) Experiment with no advection of enriched coastal material; and (3 rd row) Experiment with advection of enriched coastal material. Average scenarios of: (1 st column) summer; (2 nd column) fall; (3 rd column) winter and; (4 th column) spring. The concentration of chlorophyll-a is on a logarithmic scale. Dashed lines represent negative streamlines, and solid lines represent positive streamlines. The white shaded area masks regions shallower than 100 m.

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