TY - JOUR A1 - Wankel, S. D. A1 - Buchwald, C. A1 - Ziebis, W. A1 - Wenk, C. B. A1 - Lehmann, M. F. T1 - Nitrogen cycling in the deep sedimentary biosphere: nitrate isotopes in porewaters underlying the oligotrophic North Atlantic JO - Biogeosciences J1 - BG VL - 12 IS - 24 SP - 7483 EP - 7502 Y1 - 2015/12/21 PB - Copernicus Publications SN - 1726-4189 UR - https://bg.copernicus.org/articles/12/7483/2015/ L1 - https://bg.copernicus.org/articles/12/7483/2015/bg-12-7483-2015.pdf DO - 10.5194/bg-12-7483-2015 ER -