Discussion Paper | Discussion Paper | Discussion Paper | Discussion Paper | Biogeosciences Discuss., 10, 20079–20111, 2013 Open Access www.biogeosciences-discuss.net/10/20079/2013/ Biogeosciences BGD doi:10.5194/bgd-10-20079-2013 Discussions © Author(s) 2013. CC Attribution 3.0 License. 10, 20079–20111, 2013 This discussion paper is/has been under review for the journal Biogeosciences (BG). 17O-excess traces Please refer to the corresponding final paper in BG if available. atmospheric nitrate in paleo groundwater 17 O-excess traces atmospheric nitrate in M. Dietzel et al. paleo groundwater of the Saharan desert Title Page M. Dietzel1, A. Leis2, R. Abdalla1, J. Savarino3,4, S. Morin5, M. E. Böttcher6,*, and S. Köhler1,** Abstract Introduction 1Graz University of Technology, Institute of Applied Geosciences, Rechbauerstrasse 12, 8010 Conclusions References Graz, Austria Tables Figures 2Joanneum Research, Institute of Water Resources Management, Graz, Austria 3CNRS, Institut National des Sciences de l’Univers, France 4Laboratoire de Glaciologie et de Géophysique de l’Environnement, Université Joseph J I Fourier, Grenoble, France 5Météo-France – CNRS, CNRM-GAME URA 1357, CEN, Grenoble, France J I 6 Biogeochemistry Department, Max Planck Institute for Marine Microbiology, 28359 Bremen, Back Close Germany * now at: Leibniz Institute for Baltic Sea Research, Geochemistry & Isotope Geochemistry Full Screen / Esc Group, 18119 Warnemünde, Germany ** now at: Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Printer-friendly Version Sciences, Uppsala, Sweden Interactive Discussion 20079 Discussion Paper | Discussion Paper | Discussion Paper | Discussion Paper | Received: 3 October 2013 – Accepted: 4 December 2013 – Published: 20 December 2013 Correspondence to: M. Dietzel (
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