The largest animal extinction event in recorded history occurred 251 Ma at the Permian-Triassic boundary coinciding with expansive marine anoxia. In a new study, led by postdoc Feifei Zhang, of a greatly expanded dolomite section from the Carnic Alps, Austria, marine anoxia is found to have expanded in two pulses separated by ~100,000 years. Global … Read More
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Forskerzonen: Mystery about animals in ancient anoxic oceans resolved
The newly discovered ocean ventilation events in the 500 million year old Alum shale ocean is described in Danish on Forskerzonen: Videnskab.dk
Tracking the global dynamics of Earth’s oxygen and biological production in deep time
In an article published online in PNAS Tuesday Sep 10th, we have demonstrated how a combination of metal isotope analyses in marine sedimentary rocks can constrain the global scale feedbacks between atmospheric oxygen, seafloor oxygenation, and marine biological production. The relationship between O2 and animal life turns out to be more entangled than first thought. … Read More
Tais speaks at Teacher’s conference “Big Bang to Science”
The Niels Bohr Institute invites teachers to a conference called “Big Bang til Naturfag” (Big Bang to Science) to learn more about the history of the universe, our planet and the evolution life. On Aug 6, 2019 Tais W. Dahl is giving the talk entitled “Det tidligste liv” (The earliest life). Hereafter, Morten Allentoft from … Read More
Susanne and Tais visit Potsdam Institut für Klima
Invited by Dr. Philipp Porada, Susanne and Tais will be visiting to expand our model understanding on how early plants affected the composition of the atmosphere and oceans. Thursday at 14:00, Tais will give a lecture entitled: “Evidence for the Great Mid-Paleozoic Transition linked to the colonizations of land” at Potsdam Institute for Climate Impact … Read More
Tais speaks at Nanjing Institute of Paleontological Sciences (NIGPAS) and at Nanjing University
https://twitter.com/earthtime4567?lang=da May 8, 2018. By invitation from Prof. Jitao Chen, Tais will be giving a lecture at Nanjing Institute of Paleontological Sciences on the Atmosphere-ocean oxygenation and productivity dynamics during the Cambrian explosion of animal life. May 10, 2019. Invited by Prof. Shuzhong Shen, Tais will be speaking at Nanjing University on the Great Mid-Paleozoic Transition [...]
Teaching at the Climate-KIC PhD course in Copenhagen
Geoengineering is one the key climate mitigation strategies, and even though humanity will need to cut down greenhouse hase emissions, several geoengineering mitigation strategies may develop into billion dollar businesses in the coming decades… Tais W. Dahl will be lecturing at this year’s Climate-KIC PhD course in Copenhagen on Friday July 5th.
Julius C. Havsteen defends his MSc thesis on Feb 20
Julius C. Havsteen, MSc Thesis DefenseCalibrating the d238U paleoredox proxy, using calcitic brachiopods, across the late Silurian Lau eventSupervisors: Tais W. Dahl, IGNExternal examiner: Niels Schovsbo, GEUS Geological Museum, Auditorium. Wednesday February 20, 2019 at 10–11. Øster Voldgade 5–7, 1350 Copenhagen K, Denmark
Dr. Feifei Zhang starts DFF-funded research project on ocean oxygenation
Dr. Feifei Zhang joins our group to study ocean oxygenation at the globally integrated scale at the time when forests appeared on Earth. Feifei received his PhD in summer 2018 from Arizona State University, where he was trained in Prof. Ariel Anbar’s laboratory. He will be working on metal isotopes in marine carbonates with novel … Read More
Postdoc Dr. rer. nat. Susanne Arens joins the group funded by the DFF-ERC program
On Jan 2, 2019 Dr. rer. nat Susanne Arens will join the Dahl Lab. With her strong expertise in numerical Earth system modeling, Susanne will quantify the impact of early colonization of land plants on Earth’s atmospheric composition. Susanne did her doctoral degree at the Max Planck Institute of Biogeochemistry in Jena, Germany, with Prof. … Read More