Reply to comment by Thomas M. Blattmann on “Carbon dioxide emissions by rock organic carbon oxidation and the next geochemical carbon budget of the Mackenzie River Basin”, v. 319, n. 6, p. 473–499.

• Published in: American Journal of Science
• Main Authors: Horan, Kate, Hilton, Robert, Dellinger, Mathieu, Tipper, Ed, Galy, Valier, Calmels, Damien, Selby, David, Gaillardet, Jérôme, Ottley, Chris, Parsons, Daniel, Burton, Kevin
• Other Authors: Durham University, Department of Earth Sciences USC Los Angeles, University of Southern California (USC), Department of Marine Chemistry and Geochemistry (WHOI), Woods Hole Oceanographic Institution (WHOI), Géosciences Paris Saclay (GEOPS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut de Physique du Globe de Paris (IPGP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS), Department of Earth Sciences Durham, Norwegian University of Science and Technology Trondheim (NTNU), Norwegian University of Science and Technology (NTNU)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2020
• Subjects: [SDU]Sciences of the Universe [physics]; [SDU.STU]Sciences of the Universe [physics]/Earth Sciences; Mackenzie River; Mackenzie Basin; Mackenzie river
• Online Access: https://hal.science/hal-02494318; https://doi.org/10.2475/10.2019.04

International audience Blattmann’s comment (Blattmann, 2019a) focuses on observations and proposalsmade in the concluding paragraphs of our “Wider Implications” section (pg. 495) andbriefly summarized in the final sentence of the abstract. In our manuscript (Horan andothers, 2019), these interpretations follow on from our measurements of rhenium inriver waters and sediments across the Mackenzie Basin, alongside complementarygeochemical data, which quantify the ongoing rates of rock-derived (‘petrogenic’)organic carbon oxidation. We combine our findings with two decades of publishedresearch to attempt a net geochemical carbon budget during weathering and erosionfor this large river basin (fig. 5 in Horan and others, 2019).