Spring Mixed-layer Dynamics Modulate the Nitrate Assimilation Isotope Effect in the Indian Sector of the Southern Ocean

Christina Monteiro1, Sarah Fawcett2, Heather Forrer3, Hazel Little-Leighton2, Brett Kuyper2 and Thomas James Ryan-Keogh4, (1)University of Cape Town, Oceanography, Muizenberg, South Africa, (2)University of Cape Town, Oceanography Department, Cape Town, South Africa, (3)Florida State University, Earth, Ocean & Atmospheric Science, Tallahassee, United States, (4)Council for Scientific and Industrial Research (CSIR), Southern Ocean Carbon-Climate Observatory (SOCCO), Cape Town, South Africa