Nitrate plus nitrite isotopes in the Indian sector of the Southern Ocean from the Antarctic Circumnavigation Expedition (ACE) during the Austral Summer of 2016-2017.

Here we present nitrate plus nitrite isotopic compositions from Leg 1 of the Antarctic Circumnavigation Expedition (ACE) research cruise onboard the R/V Akademik Treshnikov. This cruise sampled surface and water-column profiles of the summertime Indian Sector of the Southern Ocean, starting in Cape Town, South Africa and ending in Hobart, Australia from December 2016 to January 2017. The data collected focused on potential drivers of the nitrate plus nitrite isotope effect.