Tais Wittchen Dahl

Tais Wittchen Dahl

Associate Professor

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    ORCID: 0000-0003-4629-8036

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    1. 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 journal › Journal article › Research › peer-review

    2. 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 journal › Journal article › Research › peer-review

    3. 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 journal › Journal article › Research › peer-review

    4. 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 journal › Journal article › Research › peer-review

    5. 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 journal › Journal article › Research › peer-review

    6. 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 journal › Journal article › Research › peer-review

    7. Turbulent Mixing of Metal and Silicate during Planet Accretion – and interpretation of the Hf-W chronometer

      Dahl, Tais Wittchen & Stevenson, D., 2010, In: Earth and Planetary Science Letters. 295, p. 177-186

      Research output: Contribution to journal › Journal article › Research › peer-review

    8. Turbulent Mixing during Planet Accretion and Core Formation: Cand. Sc. Thesis, geophysics, University of Copenhagen

      Dahl, Tais Wittchen, 2005, Turbulent Mixing during Planet Accretion and Core Formation.

      Research output: Chapter in Book/Report/Conference proceeding › Report chapter › Research

    9. 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 journal › Journal article › Research › peer-review

    10. 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 journal › Journal article › Research › peer-review

    11. The human impact on natural rock reserves using basalt, anorthosite, and carbonates as raw materials in insulation products

      Dahl, Tais Wittchen, Clausen, A. U. & Hansen, P. B., 2011, In: International Geology Review. 53, p. 894-904

      Research output: Contribution to journal › Journal article › Research

    12. Published

      The behavior of molybdenum and its isotopes across the chemocline and in the sediments of sulfidic Lake Cadagno, Switzerland

      Dahl, Tais Wittchen, Anbar, A. D., Gordon, G. W., Rosing, Minik Thorleif, Frei, Robert & Canfield, D. E., Jan 2010, In: Geochimica et Cosmochimica Acta. 74, 1, p. 144-163 20 p.

      Research output: Contribution to journal › Journal article › Research › peer-review

    13. 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 journal › Editorial › Research › peer-review

    14. 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 journal › Journal article › Research › peer-review

    15. 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 conference › Conference abstract for conference › Research

    16. 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 journal › Review › Research › peer-review

    17. 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 journal › Journal article › Research › peer-review

    18. 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 journal › Journal article › Research › peer-review

    19. 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 journal › Letter › Research › peer-review

    20. 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 journal › Comment/debate › Research › peer-review

    21. Reply to Butterfield: The Devonian radiation of large predatory fish coincided with elevated atmospheric oxygen levels

      Dahl, Tais Wittchen, Hammarlund, E., Anbar, A., Bond, D., Gill, B. C., Gordon, G., Knoll, A. H. & Canfield, D. E., 2011, In: Proceedings of the National Academy of Sciences of the United States of America. 108, 9, p. E29

      Research output: Contribution to journal › Comment/debate › Research › peer-review

    22. 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 journal › Journal article › Research › peer-review

    23. 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 journal › Journal article › Research › peer-review

    24. 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 journal › Journal article › Research › peer-review

    25. Planetkort lærervejledning

      Jensen, F., Dahl, Tais Wittchen, Leer, K. & Pagh, M., 2008, Geografforlaget.

      Research output: Other contribution › Education

    26. Planetkort: Bokssæt

      Dahl, Tais Wittchen, Leer, K., Pagh, M. & Jensen, F. (ed.), May 2011, Forlaget Meloni, Odense : Meloni.

      Research output: Other contribution › Education

    27. Published

      Planetkort

      Dahl, Tais Wittchen, 2007, Danmark

      Research output: Other contribution › Education

    28. Planetkort: - et nervepirrende undervisningsspil om solsystemet

      Dahl, Tais Wittchen, 2007

      Research output: Non-textual form › 2D/3D (psysical products) › Education

    29. 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 journal › Journal article › Research › peer-review

    30. 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 journal › Journal article › Research › peer-review

    31. 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 journal › Journal article › Research › peer-review

    32. 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 journal › Journal article › Research › peer-review

    33. Published

      Molybdenum isotope variations in a redox-stratified lake: Removal mechanism and preservation in euxinic sediments

      Dahl, Tais Wittchen, Anbar, A. D., Gordon, G. W., Rosing, Minik Thorleif, Frei, Robert & Canfield, D. E., 2008, Geochim. Cosmochim. Acta,. Vol. 72/12S. p. A194

      Research output: Chapter in Book/Report/Conference proceeding › Conference abstract in proceedings › Research

    34. 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 journal › Journal article › Research › peer-review

    35. Published

      Molybdenum evidence for expansive sulfidic water masses in similar ∼ 750 Ma oceans

      Dahl, Tais Wittchen, Canfield, D. E., Rosing, Minik Thorleif, Frei, Robert, Gordon, G. W., Knoll, A. H. & Anbar, A. D., 2011, In: Earth and Planetary Science Letters. 311, 3-4, p. 264-274

      Research output: Contribution to journal › Journal article › Research › peer-review

    36. Molybdenum Stable Isotope Fractionation: - and the Interpretation of Molybdenum Burial Pathways from Sulfidic Waters to Sediments

      Dahl, Tais Wittchen, 25 Feb 2009, 205 p.

      Research output: Book/Report › Ph.D. thesis › Research

    37. Published

      Mo isotope variations in meromictic Lake Cadagno

      Dahl, Tais Wittchen, Anbar, A. D., Gordon, G. W., Frei, Robert & Canfield, D. E., 2008, In: Geochim. Cosmochim.. Acta 71, Supplement 1, p. p. A196

      Research output: Contribution to journal › Conference abstract in journal › Research

    38. 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 journal › Journal article › Research › peer-review

    39. 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 journal › Journal article › Research › peer-review

    40. 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 journal › Comment/debate › Research › peer-review

    41. 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 journal › Comment/debate › Research › peer-review

    42. Published

      Identifying remnants of early Earth

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

      Research output: Contribution to journal › Journal article › Research › peer-review

    43. Published

      Hvordan når kvinderne toppen?

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

      Research output: Contribution to journal › Contribution to newspaper - Comment/debate › Communication

    44. 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 journal › Journal article › Research › peer-review

    45. 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 journal › Review › Research › peer-review

    46. 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 journal › Contribution to newspaper - Feature article › Communication

    47. 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 journal › Journal article › Research › peer-review

    48. 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 journal › Journal article › Research › peer-review

    49. 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 journal › Journal article › Research › peer-review

    50. 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 journal › Journal article › Research › peer-review

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