Dr. Claudia Frey - Publications
(24) Frey, C., W. Tang, B. B. Ward, and M. F. Lehmann. 2024. Sample preservation methods for nitrous oxide concentration and isotope ratio measurements in aquatic environments. Limnol. Ocean. Methods 1–18. doi:10.1002/lom3.10638
(23) Kelly, C. L., N. M. Travis, P. A. Baya, C. Frey, X. Sun, B. B. Ward, and K. L. Casciotti. 2024. Isotopomer labeling and oxygen dependence of hybrid nitrous oxide production. Biogeosciences 21: 3215–3238. doi:10.5194/bg-21-3215-2024
(22) Voss, M., Choisnard, N., Bartoli, M., Bonaglia, S., Bourbonnais, A., Frey, C., Holtermann, P. L., Jennerjahn, T. C., Jickells, T., and Weston, K.: Coastal Nitrogen Cycling – Biogeochemical Processes and the Impacts of Human Activities and Climate Change, in: Treatise on Estuarine and Coastal Science, 1–26, https://doi.org/10.1016/B978-0-323-90798-9.00042-1, 2023.
(21) Choisnard, N., E. Burtscher, S. Forster, C. Frey, M. Moros, and M. Voss. 2023. The Amazon shelf sediments, a reactor that fuels intense nitrogen cycling at the seabed. Limnol. Ocean. 1–16. doi:10.1002/lno.12416
(20) Kelly, C. L., C. Manning, C. Frey, J. Kaiser, N. Gluschankoff, and K. L. Casciotti. 2023. Pyisotopomer: A Python package for obtaining intramolecular isotope ratio differences from mass spectrometric analysis of nitrous oxide isotopocules. Rapid Commun. Mass Spectrom. 1–17. doi:10.1002/rcm.9513
(19) Tracey, J. C., Babbin, A. R., Wallace, E., Sun, X., DuRussel, K. L., Frey, C., Martocello III, D. E., Tamasi, T., Oleynik, S., and Ward, B. B.. 2023. All about nitrite: exploring nitrite sources and sinks in the eastern tropical North Pacific oxygen minimum zone. Biogeosciences 20: 2499–2523. doi:10.5194/bg-20-2499-2023
(18) Sun Xin, C. Frey, and Bess B. Ward. 2023. Nitrite Oxidation Across the Full Oxygen Spectrum in the Ocean. Global Biogeochem. Cycles 1–8. doi:10.1029/2022GB007548
(17) Tang, W., Ward, B. B., Beman, M., Bristow, L., Clark, D., Fawcett, S., Frey, C., Fripiat, F., Herndl, G. J., Mdutyana, M., Paulot, F., Peng, X., Santoro, A. E., Shiozaki, T., Sintes, E., Stock, C., Sun, X., Wan, X. S., Xu, M. N., and Zhang, Y.. 2023. Database of nitrification and nitrifiers in the global ocean. Earth Syst. Sci. Data. doi:10.5194/essd-2023-194
(16) Huang, K., W. Eschenbach, J. Wei, D. Hausherr, C. Frey, A. Kupferschmid, J. Dyckmans, A. Joss, M. F. Lehmann, J. Mohn (2023). Simultaneous 15N online analysis in NH4+, NO2–, NO3–, and N2O to Trace N2O Production Pathways in Nitrogen-Polluted Aqueous Environments. In Press https://doi.org/10.1021/acsestwater.3c00216
(15) Einbock, A., Burtscher E., Frey C., Conen F. (2023) Export of ice-nucleating particles from watersheds: results from the Amazon and Tocantins river plumes Royal Society Open Science. (10) 220878.220878 http://doi.org/10.1098/rsos.220878
(14) Frey, C., Xi. Sun, L. Szemberski, K. L. Casciotti, E. Garcia-Robledo, A. Jayakumar, C.L. Kelly, M.F. Lehmann, and Bess B. Ward (2023). Kinetics of nitrous oxide production from ammonia oxidation in the Eastern Tropical North Pacific. Limnology and Oceanography; Vol. 68, 424-438; https://doi.org/10.1002/lno.12283
(13) Tischer, J. , J. Zopfi, C. Frey, P. M. Magyar, A. Brand, K. Oswald, C. Jegge, C.H. Frame, M. R. Miracle, X. Sòria-Perpinyà, E. Vicente and M.F. Lehmann (2022). Isotopic signatures of biotic and abiotic N2O production and consumption in the water column of meromictic, ferruginous Lake La Cruz (Spain). Limnology and Oceanography; Vol. 67, 1760-1775; https://doi.org/10.1002/lno.12165
(12) Visser, A.-N., S.D. Wankel, C. Frey, A. Kappler and M. F. Lehmann (2022). Unchanged nitrate and nitrite isotope fractionation during heterotrophic and Fe(II)-mixotrophic denitrification suggest a nonenzymatic link between denitrification and Fe(II) oxidation. In press Frontiers in Microbiology - Microbiological Chemistry and Geomicrobiology
(11) Frey, C., Xi. Sun, L. Szemberski, K. L. Casciotti, E. Garcia-Robledo, A. Jayakumar, C.L. Kelly, M.F. Lehmann, and Bess B. Ward. Nitrous oxide production kinetics from ammonia oxidation in the Eastern Tropical North Pacific. Submitted Limnology and Oceanography. 2021
(10) Bourbonnais*, A., Frey*, C., Sun, X., Bristow, L. A., Jayakumar, A., Ostrom, N. E., Casciotti, K. L. and Ward, B. B. Protocols for assessing transformation rates of nitrous oxide in the water column, Frontiers in Marine Science, 8, 293, doi:10.3389/FMARS.2021.611937, 2021 *these authors contributed equally
(9) Sun, X., Frey, C., Garcia-Robledo, E., Jayakumar A., Ward B.Microbial niche differentiation explains nitrite oxidation in marine oxygen minimum zones. ISME J 2021. doi.org/10.1038/s41396-020-00852-3
(8) Wilson,Samuel T.; Al-Haj, Alia N.; Bourbonnais, Annie; Frey, Claudia; Fulweiler, Robinson W.; Kessler,John D.; Marchant, Hannah K.; Milucka, Jana; Ray,Nicholas E.; Suntharalingam, Parvadha ; Thornton, Brett F. ; Upstill-Goddard, Robert C.; Weber, Thomas S.; Arévalo-Martínez, Damian L.; Bange, Hermann W.; Benway, Heather M.; Bianchi, Daniele; Borges, Alberto V. ; Chang, Bonnie X. ;Crill, Patrick M.; del Valle, Daniela A.;Farías, Laura; Joye, Samantha B.; Kock, Annette; Labidi, Jabrane; Manning, Cara C.;Pohlman, John W.; Rehder, Gregor; Sparrow, Katy J. ; Tortell, Philippe D.; Treude, Tina ; Valentine, David L. ; Ward, Bess B.; Yang, Simon; Yurganov, Leonid N.: Ideas and perspectives: A strategic assessment of methane and nitrous oxide measurements in the marine environment. Biogeosciences, 17, 5809-5828, 2020; doi.org/10.5194/bg-17-5809-2020
(7) Frey, C., Bange, H. W., Achterberg, E. P., Jayakumar, A., Löscher, C. R., Arévalo-Martínez, D. L., León-Palmero, E., Sun, M., Sun, X., Xie, R. C., Oleynik, S., and Ward, B. B.: Regulation of nitrous oxide production in low-oxygen waters off the coast of Peru. Biogeosciences, 17, 2263–2287, doi.org/10.5194/bg-17-2263-2020, 2020.
(6) Cojean, A.N.Y., J. Zopfi, A. Gerster, C. Frey, F. Lepori, M.F. Lehmann (2019). Direct O2 control on the partitioning between denitrification and dissimilatory nitrate reduction to ammonium in lake sediments. Biogeosciences, 16, 4705-4718, doi.org/10.5194/bg-16-4705-2019
(5) Wannicke, N, Frey, C, Law, CS, Voss, M, 2018. The response of the marine nitrogen cycle to ocean acidification. Global Change Biology 1-13, doi: 10.1111/gcb.14424
(4) Ji, Q., Frey, C., Sun, X., Jackson, M., Lee, Y.-S., Jayakumar, A., Cornwell, J. C., and Ward, B. B.: Nitrogen and oxygen availabilities control water column nitrous oxide production during seasonal anoxia in the Chesapeake Bay, Biogeosciences Discuss., doi.org/10.5194/bg-2018-113, 2018.
(3) Korth, F., B. Deutsch, C. Frey, C. Moros, and M. Voss. 2014. Nitrate source identification in the Baltic Sea using its isotopic ratios in combination with a Bayesian isotope mixing model. Biogeosciences 11: 4913–4924.
(2)Frey, C., J. W. Dippner, and M. Voss. 2014a. Close coupling of N-cycling processes expressed in stable isotope data at the redoxcline of the Baltic Sea. Global Biogeochem. Cycles 28: 974–991.
(1) Frey, C., S. Hietanen, K. Juergens, M. Labrenz, and M. Voss. 2014b. N and O Isotope Fractionation in Nitrate during Chemolithoautotrophic Denitrification by Sulfurimonas gotlandica. Environ. Sci. Technol. 48: 13229–13237.