Tais Wittchen Dahl

Tais Wittchen Dahl

Associate Professor

Member of:


    1. 2024
    2. Published

      Environmental and trilobite diversity changes during the middle-late Cambrian SPICE event

      Zhang, L., Algeo, T. J., Zhao, L., Dahl, Tais Wittchen, Chen, Z. Q., Zhang, Z., Poulton, S. W., Hughes, N. C., Gou, X. & Li, C., 2024, In: Geological Society of America. Bulletin. 136, 1-2, p. 810-828 19 p.

      Research output: Contribution to journalJournal articlepeer-review

    3. Published

      No evidence for a volcanic trigger for late Cambrian carbon-cycle perturbations

      Frieling, J., Mather, T. A., Fendley, I. M., Jenkyns, H. C., Zhao, Zhengfu, Dahl, Tais Wittchen, Bergquist, B. A., Cheng, K., Nielsen, Arne Thorshøj & Dickson, A. J., 2024, In: Geology. 52, 1, p. 12-16 5 p.

      Research output: Contribution to journalJournal articlepeer-review

    4. 2023
    5. Published

      Dynamic oceanic redox conditions across the late Cambrian SPICE event constrained by molybdenum and uranium isotopes

      Zhao, Zhengfu, Pang, X., Zou, C., Dickson, A. J., Basu, A., Guo, Z., Pan, S., Nielsen, Arne Thorshøj, Schovsbo, N. H., Jing, Z. & Dahl, Tais Wittchen, 2023, In: Earth and Planetary Science Letters. 604, 13 p., 118013.

      Research output: Contribution to journalJournal articlepeer-review

    6. Published

      Mid-Ludfordian uranium isotope records distinguish the role of expansive marine anoxia in global carbon cycle dynamics during the late Silurian Lau/Kozlowskii bioevent

      del Rey, Álvaro, Frýda, J., Calner, M., Frýdová, B., Zhang, F., Wang, C., Planavsky, N. & Dahl, Tais Wittchen, 2023, In: Global and Planetary Change. 229, 104248.

      Research output: Contribution to journalJournal articlepeer-review

    7. Published

      Substantial incorporation of isotopically heavy reduced U species into marine carbonate sediments

      Yuan, Y., Chen, T., Zhang, F., Liu, Y., Xiong, G., Wei, G., Dahl, Tais Wittchen, Yan, W., Ling, H., Cheng, H. & Shen, S., 2023, In: Geochimica et Cosmochimica Acta. 358, p. 27-37 11 p.

      Research output: Contribution to journalJournal articlepeer-review

    8. 2022
    9. Published

      A dynamic local-scale vegetation model for lycopsids (LYCOm v1.0)

      Halder, S., Arens, S. K. M., Jensen, K., Dahl, Tais Wittchen & Porada, P., 2022, In: Geoscientific Model Development. 15, 5, p. 2325-2343

      Research output: Contribution to journalJournal articlepeer-review

    10. Published

      Chemostratigraphy: using elements and isotopes to identify, interpret and correlate events in strata

      Shields, G. A., Edgar, K. M., Ratcliffe, K. T. & Dahl, Tais Wittchen, 2022, Deciphering Earth's History: the Practice of Stratigraphy. Coe, A. L. (ed.). Geological Society, p. 101-120 (Geoscience in Practice).

      Research output: Chapter in Book/Report/Conference proceedingBook chapterResearchpeer-review

    11. Published

      Constraining marine anoxia under the extremely oxygenated Permian atmosphere using uranium isotopes in calcitic brachiopods and marine carbonates

      Wang, W., Zhang, F., Shen, S., Bizzarro, Martin, Garbelli, C., Zheng, Q., Zhang, Y., Yuan, D., Shi, Y., Cao, M. & Dahl, Tais Wittchen, 2022, In: Earth and Planetary Science Letters. 594, 15 p., 117714.

      Research output: Contribution to journalJournal articlepeer-review

    12. Published

      High-resolution carbon isotope chemostratigraphy of the middle Cambrian to lowermost Ordovician in southern Scandinavia: Implications for global correlation

      Zhao, Zhengfu, Ahlberg, P., Thibault, Nicolas Rudolph, Dahl, Tais Wittchen, Schovsbo, N. H. & Nielsen, Arne Thorshøj, 2022, In: Global and Planetary Change. 209, 13 p., 103751.

      Research output: Contribution to journalJournal articlepeer-review

    13. Published

      Low atmospheric CO2 levels before the rise of forested ecosystems

      Dahl, Tais Wittchen, Harding, Magnus August Ravn, Brugger, J., Feulner, G., Norrman, K., Lomax, B. H. & Junium, C. K., 2022, In: Nature Communications. 13, 10 p., 7616.

      Research output: Contribution to journalJournal articlepeer-review

    14. Published

      Stable ocean redox during the main phase of the Great Ordovician Biodiversification Event

      del Rey, Álvaro, Rasmussen, Christian Mac Ørum, Calner, M., Wu, R., Asael, D. & Dahl, Tais Wittchen, 2022, In: Communications Earth & Environment. 3, 7 p., 220.

      Research output: Contribution to journalJournal articlepeer-review

    15. Published

      Synchronizing rock clocks in the late Cambrian

      Zhao, Zhengfu, Thibault, Nicolas Rudolph, Dahl, Tais Wittchen, Schovsbo, N. H., Sørensen, A. L., Rasmussen, Christian Mac Ørum & Nielsen, Arne Thorshøj, 2022, In: Nature Communications. 13, 11 p., 1990.

      Research output: Contribution to journalJournal articlepeer-review

    16. Published

      Uranium isotope evidence for extensive shallow water anoxia in the early Tonian oceans

      Zhang, F., Stockey, R. G., Xiao, S., Shen, S., Dahl, Tais Wittchen, Wei, G., Cao, M., Li, Z., Kang, J., Cui, Y., Anbar, A. D. & Planavsky, N. J., 2022, In: Earth and Planetary Science Letters. 583, 12 p., 117437.

      Research output: Contribution to journalJournal articlepeer-review

    17. 2021
    18. Published

      Land plant evolution and global erosion rates: Reply to Neil S. Davies and William J. McMahon

      Dahl, Tais Wittchen & Arens, S. K. M., 5 Jul 2021, In: Chemical Geology. 573, 120167.

      Research output: Contribution to journalComment/debatepeer-review

    19. Published

      Curation and Analysis of Global Sedimentary Geochemical Data to Inform Earth History

      Mehra, A., Keller, C. B., Zhang, T., Tosca, N. J., McLennan, S. M., Sperling, E., Farrell, U., Brocks, J., Canfield, D., Cole, D., Crockford, P., Cui, H., Dahl, T. W., Dewing, K., Emmings, J. F., Gaines, R. R., Gibson, T., Gilleaudeau, G. J., Guilbaud, R., Hodgskiss, M. & 17 others, Jarrett, A., Kabanov, P., Kunzmann, M., Li, C., Loydell, D. K., Lu, X., Miller, A., Mills, N. T., Mouro, L. D., O'Connell, B., Peters, S. E., Poulton, S., Ritzer, S. R., Smith, E., Wilby, P., Woltz, C. & Strauss, J. V., 2021, In: GSA Today. 31, 5, p. 4-9 6 p.

      Research output: Contribution to journalJournal articlepeer-review

    20. Published

      Land plant evolution and global erosion rates: Reply to Neil S. Davies and William J. McMahon

      Dahl, Tais Wittchen & Arens, S. K. M., 2021, In: Chemical Geology. 573, 2 p., 120167.

      Research output: Contribution to journalComment/debatepeer-review

    21. Published

      Paired U and Mo isotope evidence for pervasive anoxia in the Cryogenian early interglacial ocean

      Pan, W., Cao, M., Du, Y., Cheng, M., Zhou, Y. Q., Algeo, T. J., Zhao, M. Y., Thibault, Nicolas Rudolph, Li, C., Wei, G. Y. & Dahl, Tais Wittchen, 2021, In: Precambrian Research. 361, 13 p., 106244.

      Research output: Contribution to journalJournal articlepeer-review

    22. Published

      Redox dynamics of later Cambrian oceans

      Gill, B. C., Dahl, Tais Wittchen, Hammarlund, E. U., LeRoy, M. A., Gordon, G. W., Canfield, D. E., Anbar, A. D. & Lyons, T. W., 2021, In: Palaeogeography, Palaeoclimatology, Palaeoecology. 581, 15 p., 110623.

      Research output: Contribution to journalJournal articlepeer-review

    23. Published

      Sulfidic anoxia in the oceans during the Late Ordovician mass extinctions – insights from molybdenum and uranium isotopic global redox proxies

      Dahl, Tais Wittchen, Hammarlund, E. U., Rasmussen, Christian Mac Ørum, Bond, D. P. G. & Canfield, D. E., 2021, In: Earth-Science Reviews. 220, 14 p., 103748.

      Research output: Contribution to journalReviewpeer-review

    24. Published

      Synchronizing Rock Clocks in the Cambrian

      Zhao, Zhengfu, Thibault, Nicolas Rudolph, Dahl, Tais Wittchen, Schovsbo, N. H., Sørensen, A. L., Rasmussen, Christian Mac Ørum & Nielsen, Arne Thorshøj, 2021. 1 p.

      Research output: Contribution to conferenceConference abstract for conferenceResearch

    25. Published

      The Sedimentary Geochemistry and Paleoenvironments Project

      Farrell, U. C., Samawi, R., Anjanappa, S., Klykov, R., Adeboye, O. O., Agic, H., Ahm, A-S. C., Boag, T. H., Bowyer, F., Brocks, J. J., Brunoir, T. N., Canfield, D. E., Chen, X., Cheng, M., Clarkson, M. O., Cole, D. B., Cordie, D. R., Crockford, P. W., Cui, H., Dahl, T. W. & 88 others, Mouro, L. D., Dewing, K., Dornbos, S. Q., Drabon, N., Dumoulin, J. A., Emmings, J. F., Endriga, C. R., Fraser, T. A., Gaines, R. R., Gaschnig, R. M., Gibson, T. M., Gilleaudeau, G. J., Gill, B. C., Goldberg, K., Guilbaud, R., Halverson, G. P., Hammarlund, E. U., Hantsoo, K. G., Henderson, M. A., Hodgskiss, M. S. W., Horner, T. J., Husson, J. M., Johnson, B., Kabanov, P., Brenhin Keller, C., Kimmig, J., Kipp, M. A., Knoll, A. H., Kreitsmann, T., Kunzmann, M., Kurzweil, F., LeRoy, M. A., Li, C., Lipp, A. G., Loydell, D. K., Lu, X., Macdonald, F. A., Magnall, J. M., Mänd, K., Mehra, A., Melchin, M. J., Miller, A. J., Mills, N. T., Mwinde, C. N., O'Connell, B., Och, L. M., Ossa Ossa, F., Pages, A., Paiste, K., Partin, C. A., Peters, S. E., Petrov, P., Playter, T. L., Plaza-Torres, S., Porter, S. M., Poulton, S. W., Pruss, S. B., Richoz, S., Ritzer, S. R., Rooney, A. D., Sahoo, S. K., Schoepfer, S. D., Sclafani, J. A., Shen, Y., Shorttle, O., Slotznick, S. P., Smith, E. F., Spinks, S., Stockey, R. G., Strauss, J. V., Stüeken, E. E., Tecklenburg, S., Thomson, D., Tosca, N. J., Uhlein, G. J., Vizcaino, M. N., Wang, H., White, T., Wilby, P. R., Woltz, C. R., Wood, R. A., Xiang, L., Yurchenko, I. A., Zhang, T., Planavsky, N. J., Lau, K. V., Johnston, D. T. & Sperling, E. A., 2021, In: Geobiology. 19, 6, p. 545-556 12 p.

      Research output: Contribution to journalEditorialpeer-review

    26. 2020
    27. Published

      Uranium isotope compositions of biogenic carbonates – Implications for U uptake in shells and the application of the paleo-ocean oxygenation proxy

      Livermore, B. D., Dahl, Tais Wittchen, Bizzarro, Martin & Connelly, James, 15 Oct 2020, In: Geochimica et Cosmochimica Acta. 287, p. 50-64 15 p.

      Research output: Contribution to journalJournal articlepeer-review

    28. Published

      Astronomically forced climate change in the late Cambrian

      Sørensen, A. L., Nielsen, Arne Thorshøj, Thibault, Nicolas Rudolph, Zhao, Zhengfu, Schovsbo, N. H. & Dahl, Tais Wittchen, 1 Oct 2020, In: Earth and Planetary Science Letters. 548, 13 p., 116475.

      Research output: Contribution to journalJournal articlepeer-review

    29. Published

      The impacts of land plant evolution on Earth's climate and oxygenation state – An interdisciplinary review

      Dahl, Tais Wittchen & Arens, S. K. M., 5 Aug 2020, In: Chemical Geology. 547, 25 p., 119665.

      Research output: Contribution to journalJournal articlepeer-review

    30. Published

      Anomalous marine calcium cycle linked to carbonate factory change after the Smithian Thermal Maximum (Early Triassic)

      Zhao, H., Dahl, Tais Wittchen, Chen, Z., Algeo, T. J., Zhang, L., Liu, Y., Hu, Z. & Hu, Z., 2020, In: Earth-Science Reviews. 211, 16 p., 103418.

      Research output: Contribution to journalReviewpeer-review

    31. Published

      Comparison of Ediacaran platform and slope δ238U records in South China: Implications for global-ocean oxygenation and the origin of the Shuram Excursion

      Cao, M., Daines, S. J., Lenton, T. M., Cui, H., Algeo, T. J., Dahl, Tais Wittchen, Shi, W., Chen, Z. Q., Anbar, A. & Zhou, Y. Q., 2020, In: Geochimica et Cosmochimica Acta. 287, p. 111-124 14 p.

      Research output: Contribution to journalJournal articlepeer-review

    32. Published

      Estimating ancient seawater isotope compositions and global ocean redox conditions by coupling the molybdenum and uranium isotope systems of euxinic organic-rich mudrocks

      Lu, X., Dahl, Tais Wittchen, Zheng, W., Wang, S. & Kendall, B., 2020, In: Geochimica et Cosmochimica Acta. 290, p. 76-103 28 p.

      Research output: Contribution to journalJournal articlepeer-review

    33. Published

      Extensive marine anoxia associated with the Late Devonian Hangenberg Crisis

      Zhang, F., Dahl, Tais Wittchen, Lenton, T. M., Luo, G., Shen, S. Z., Algeo, T. J., Planavsky, N., Liu, J., Cui, Y., Qie, W., Romaniello, S. J. & Anbar, A. D., 2020, In: Earth and Planetary Science Letters. 533, 11 p., 115976.

      Research output: Contribution to journalJournal articlepeer-review

    34. Published

      Two distinct episodes of marine anoxia during the Permian-Triassic crisis evidenced by uranium isotopes in marine dolostones

      Zhang, F., Shen, S. Z., Cui, Y., Lenton, T. M., Dahl, Tais Wittchen, Zhang, H., Zheng, Q. F., Wang, W., Krainer, K. & Anbar, A. D., 2020, In: Geochimica et Cosmochimica Acta. 287, p. 165-179

      Research output: Contribution to journalJournal articlepeer-review

    35. Published

      Untangling the diagenetic history of uranium isotopes in marine carbonates: A case study tracing the δ238U composition of late Silurian oceans using calcitic brachiopod shells

      del Rey, Álvaro, Havsteen, J. C., Bizzarro, Martin & Dahl, Tais Wittchen, 2020, In: Geochimica et Cosmochimica Acta. 287, p. 93-110

      Research output: Contribution to journalJournal articlepeer-review

    36. Published

      Uranium isotopes in marine carbonates as a global ocean paleoredox proxy: A critical review

      Zhang, F., Lenton, T. M., del Rey, Álvaro, Romaniello, S. J., Chen, X., Planavsky, N. J., Clarkson, M. O., Dahl, Tais Wittchen, Lau, K. V., Wang, W., Li, Z., Zhao, M., Isson, T., Algeo, T. J. & Anbar, A. D., 2020, In: Geochimica et Cosmochimica Acta. 287, p. 27-49

      Research output: Contribution to journalJournal articlepeer-review

    37. 2019
    38. Published

      Atmosphere-ocean oxygen and productivity dynamics during early animal radiations

      Dahl, Tais Wittchen, Connelly, James, Li, D., Kouchinsky, A., Gill, B. C., Porter, S., Maloof, A. C. & Bizzarro, Martin, 2019, In: Proceedings of the National Academy of Sciences of the United States of America. 116, 39, p. 19352-19361 10 p.

      Research output: Contribution to journalJournal articlepeer-review

    39. Published

      Brief oxygenation events in locally anoxic oceans during the Cambrian solves the animal breathing paradox

      Dahl, Tais Wittchen, Siggaard-Andersen, Marie-Louise, Schovsbo, E. H., Persson, Daniel Pergament, Husted, Søren, Hougård, Iben Winther, Dickson, A. J., Kjær, Kurt H. & Nielsen, Arne Thorshøj, 2019, In: Scientific Reports. 9, 9 p., 11669.

      Research output: Contribution to journalJournal articlepeer-review

    40. 2018
    41. Published

      Ocean redox conditions between the snowballs: geochemical constraints from Arena Formation, East Greenland

      Scheller, E. L., Dickson, A. J., Canfield, D. E., Korte, Christoph, Kristiansen, K. K. & Dahl, Tais Wittchen, 1 Dec 2018, In: Precambrian Research. 319, p. 173-186 14 p.

      Research output: Contribution to journalJournal articlepeer-review

    42. Published

      Bioturbation and directionality in Earth's carbon isotope record across the Neoproterozoic-Cambrian transition

      Boyle, R. A., Dahl, Tais Wittchen, Bjerrum, Christian J. & Canfield, D. E., 2018, In: Geobiology. 16, 3, p. 252-278 27 p.

      Research output: Contribution to journalJournal articlepeer-review

    43. 2017
    44. Published

      Reorganisation of Earth's biogeochemical cycles briefly oxygenated the oceans 520 Myr ago

      Dahl, Tais Wittchen, Connelly, James, Kouchinsky, A., Gill, B. C., Månsson, S. F. & Bizzarro, Martin, 15 Jun 2017, In: Geochemical Perspectives Letters. 3, 2, p. 210-220 11 p.

      Research output: Contribution to journalJournal articlepeer-review

    45. Published

      Molybdenum isotope fractionation and speciation in a euxinic lake—Testing ways to discern isotope fractionation processes in a sulfidic setting

      Dahl, Tais Wittchen & Wirth, S. B., 5 Jun 2017, In: Chemical Geology. 460, p. 84-92 9 p.

      Research output: Contribution to journalJournal articlepeer-review

    46. Published

      Evidence of molybdenum association with particulate organic matter under sulfidic conditions

      Dahl, Tais Wittchen, Chappaz, A., Hoek, J. B., McKenzie, C. J., Svane, S. & Canfield, D. E., 2017, In: Geobiology. 15, 2, p. 311-323 13 p.

      Research output: Contribution to journalJournal articlepeer-review

    47. Published

      Good golly, why moly? The stable isotope geochemistry of molybdenum

      Kendall, B., Dahl, Tais Wittchen & Anbar, A. D., 2017, In: Reviews in Mineralogy and Geochemistry. 82, 1, p. 683-732 50 p.

      Research output: Contribution to journalReviewpeer-review

    48. 2016
    49. Published

      Earliest land plants created modern levels of atmospheric oxygen

      Lenton, T. M., Dahl, Tais Wittchen, Daines, S. J., Mills, B. J. W., Ozaki, K., Saltzman, M. R. & Porada, P., 2016, In: National Academy of Sciences. Proceedings. 113, 35, p. 9704-9709 6 p.

      Research output: Contribution to journalJournal articlepeer-review

    50. Published

      Identifying remnants of early Earth

      Dahl, Tais Wittchen, 2016, In: Science. 352, 6287, p. 768-769 2 p.

      Research output: Contribution to journalJournal articlepeer-review

    51. Published

      Reply to Planavsky et al.: Strong evidence for high atmospheric oxygen levels 1,400 million years ago

      Zhang, S., Wang, X., Wang, H., Bjerrum, Christian J., Hammarlund, E. U., Dahl, Tais Wittchen & Canfield, D. E., 2016, In: National Academy of Sciences. Proceedings. 113, 19, p. E2552-E2553 2 p.

      Research output: Contribution to journalComment/debatepeer-review

    52. 2015
    53. Flere kvinder giver fair play

      Lundby, Alicia, Gerken, M., Quist, Pia, Bille, Mikkel & Dahl, Tais Wittchen, 29 May 2015, In: Weekendavisen.

      Research output: Contribution to journalContribution to newspaper - Feature article

    54. 2014
    55. Published

      Uranium isotopes distinguish two geochemically distinct stages during the later Cambrian SPICE event

      Dahl, Tais Wittchen, Boyle, R. A., Canfield, D. E., Connelly, James, Gill, B. C., Lenton, T. M. & Bizzarro, Martin, 1 Sep 2014, In: Earth and Planetary Science Letters. 401, p. 313-326 14 p.

      Research output: Contribution to journalJournal articlepeer-review

    56. Published

      Stabilization of the coupled oxygen and phosphorus cycles by the evolution of bioturbation

      Boyle, R., Dahl, Tais Wittchen, Dale, A. W., Shields-Zhou, G. A., Zhu, M., Brasier, M. D., Canfield, D. E. & Lenton, T. M., 2014, In: Nature Geoscience. 7, 9, p. 671-676 6 p.

      Research output: Contribution to journalLetterpeer-review

    57. 2013
    58. Published

      Tracing euxinia by molybdenum concentrations in sediments using handheld X-ray fluorescence spectroscopy (HHXRF)

      Dahl, Tais Wittchen, Ruhl, M., Hammarlund, E. U., Canfield, D. E., Rosing, Minik Thorleif & Bjerrum, Christian J., 18 Dec 2013, In: Chemical Geology. 360-361, p. 241-251 11 p.

      Research output: Contribution to journalJournal articlepeer-review

    59. Published

      Bacterial natural transformation by highly fragmented and damaged DNA

      Overballe-Petersen, S., Harms, K., Orlando, L. A. A., Moreno Mayar, J. Víctor, Rasmussen, Simon, Dahl, Tais Wittchen, Rosing, Minik Thorleif, Poole, A. M., Sicheritz-Ponten, T., Brunak, S., Inselmann, S., de Vries, J., Wackernagel, W., Pybus, O. G., Nielsen, Rasmus, Johnsen, P. J., Nielsen, K. M. & Willerslev, Eske, 3 Dec 2013, In: Proceedings of the National Academy of Sciences of the United States of America. 110, 49, p. 19860–19865 6 p.

      Research output: Contribution to journalJournal articlepeer-review

    60. Published

      Hvordan når kvinderne toppen?

      Lundby, Alicia, Gerken, M., Jess, T. & Dahl, Tais Wittchen, 5 Nov 2013, In: Berlingske Tidende.

      Research output: Contribution to journalContribution to newspaper - Comment/debate

    61. Published

      Precise and accurate δ13C analysis of rock samples using Flash Combustion–Cavity Ring Down Laser Spectroscopy

      Balslev-Clausen, D. M., Dahl, Tais Wittchen, Saad, N. & Rosing, Minik Thorleif, 1 Apr 2013, In: Journal of Analytical Atomic Spectrometry. 28, 4, p. 516-523 8 p.

      Research output: Contribution to journalJournal articlepeer-review

    62. Molybdenum reduction in a sulfidic lake: evidence from X-ray absorption fine–structure spectroscopy and implications for the Mo paleoproxy

      Dahl, Tais Wittchen, Chappaz, A., Fitts, J. P. & Lyons, T. W., Feb 2013, In: Geochimica et Cosmochimica Acta. 103, p. 213-231 19 p.

      Research output: Contribution to journalJournal articlepeer-review

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