Member Profile

Felipe Silva

PhD student

The Institute for Marine and Antarctic Studies (IMAS)
University of Tasmania

felipe.dasilva@utas.edu.au

Biography

Quantitative Marine Science PhD Student at UTas & CSIRO, AU. BSc in Oceanography at University of São Paulo, BR. Bachelor's research: DWBC anticyclone genesis investigation off NE Brazil. Previously worked as Env. Educator at UGGI and Env. Analyst at PETROBRAS. Collaboration at UMassD, USA: Process study on the genesis of the Potiguar Eddy (36°W, 4°S). Current research interests: ACC, vertical transfer of momentum and interaction between wave, eddies and meanders.

THESIS: Dynamical oceanography of a standing meander in the Antarctic Circumpolar Current: a parallel investigation with observations and models

A confounding Antarctic Circumpolar Current (ACC) feature is its apparent insensitivity to changes in wind and buoyancy forcing. Observations and models consistently show that the ACC's volume transport has not increased despite a 20% increase in wind stress over the past two decades. Recent work has highlighted the importance of the ACC interaction with rough sea floor topography. In regions of rough topography, the ACC develops standing meanders that are Rossby waves arrested by the ACC’s flow. The smaller scale processes associated with these meanders have been suggested to be important for both regulating the ACC transport and its flux of heat and other properties. Diagnosing the dynamical processes that distribute momentum and tracers (heat, salt, carbon) within an ACC meander help to understand how they respond to changes in wind and buoyancy forcing. Clarifying the nature of these features broaden the comprehension about how standing meanders can slow the ACC.