Variability in primary productivity and bio-optical properties in the Indian sector of the Southern Ocean during an aust
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ORIGINAL PAPER
Variability in primary productivity and bio‑optical properties in the Indian sector of the Southern Ocean during an austral summer Anvita U. Kerkar1,5 · S. C. Tripathy1 · P. Minu2 · N. Baranval3 · P. Sabu1 · S. Patra4 · R. K. Mishra1 · A. Sarkar1,6 Received: 5 December 2019 / Revised: 30 June 2020 / Accepted: 3 August 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract The Southern Ocean (SO), in spite of its major contribution to global primary productivity (PP), remains underexplored in this aspect. Light being the most limiting parameter affecting primary production, it is crucial to study the ambient light field to understand PP and associated processes. The current study makes a dual effort to present PP estimates as well as understand the bio-optical variability in the Indian sector of the Southern Ocean (ISSO). Results suggest that PP was highest at Sub-Tropical Front (STF) and lowest at Polar Front-2 (PF2). Most PP profiles were characterized by subsurface maxima, indicating probable photoinhibition or micronutrient limitation at surface layer. Strong correlation between measured and satellite-based integrated PP (R2 = 0.94, RMSE = 77.48, p
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