Nitrate and Total Organic Nitrogen Isotopic Signals of Nitrogen Transformations in the Surface Waters of the California Current Upwelling System

Lingkun Guo1, Yeongjun Ryu1, Julie Granger2 and Daniel Mikhail Sigman1, (1)Princeton University, Geosciences, Princeton, United States, (2)University of Connecticut, Marine Sciences, Groton, United States