Unique Sources and Cycling of Semi-Labile and Refractory Marine Dissolved Organic Nitrogen in the Major Ocean Basins

Taylor Broek, University of California, Santa Cruz, Ocean Sciences Department, Santa Cruz, CA, United States; Lawrence Livermore National Laboratory, Center for Accelerator Mass Spectrometry, Livermore, CA, United States and Matthew D. McCarthy, University of California Santa Cruz, Ocean Sciences Department, Santa Cruz, CA, United States