N Cycling in the Eastern Canadian Arctic: Constraints from Dual Isotope Measurements in Nitrate and Nitrous Oxide

Nadine Lehmann1, Markus Kienast1, Julie Granger2, Annie Bourbonnais3,4, Mark A Altabet3 and Jean-Eric Tremblay5, (1)Dalhousie University, Department of Oceanography, Halifax, NS, Canada, (2)University of Connecticut, Department of Marine Sciences, Groton, CT, United States, (3)University of Massachusetts Dartmouth, New Bedford, MA, United States, (4)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (5)Laval University, Biologie, Quebec City, QC, Canada