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3548
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Overview

Clemens V. Ullmann is affiliated with the University of Exeter in the United Kingdom. The primary focus of their research lies within the fields of Earth and Planetary Sciences and Environmental Science. Their work often involves detailed investigations in subfields including Paleontology, Atmospheric Science, Geophysics, Oceanography, and Global and Planetary Change.

The scientist's research covers a range of topics, notably:

  • Paleontology and Stratigraphy of Fossils
  • Geology and Paleoclimatology Research
  • Geological and Geochemical Analysis
  • Methane Hydrates and Related Phenomena
  • Hydrocarbon Exploration and Reservoir Analysis
  • Marine Bivalve and Aquaculture Studies
  • Isotope Analysis in Ecology

Ullmann has contributed to several peer-reviewed publications. Selected recent papers include:

  • Orbital pacing and secular evolution of the Early Jurassic carbon cycle, 2020, published in Proceedings of the National Academy of Sciences
  • Warm afterglow from the Toarcian Oceanic Anoxic Event drives the success of deep-adapted brachiopods, 2020, published in Scientific Reports
  • Absolute seasonal temperature estimates from clumped isotopes in bivalve shells suggest warm and variable greenhouse climate, 2021, published in Communications Earth & Environment
  • Unravelling Middle to Late Jurassic palaeoceanographic and palaeoclimatic signals in the Hebrides Basin using belemnite clumped isotope thermometry, 2020, published in Earth and Planetary Science Letters
  • Reconstructing the magnitude of Early Toarcian (Jurassic) warming using the reordered clumped isotope compositions of belemnites, 2020, published in Geochimica et Cosmochimica Acta

Frequent collaborators of Ullmann include:

  • Nicolas Thibault
  • Stephen P. Hesselbo
  • Christoph Korte
  • Niels J. de Winter
  • Philippe Claeys

The primary venues in which this scientist publishes are:

  • Zenodo (CERN European Organization for Nuclear Research)
  • Scientific Reports
  • Newsletters on Stratigraphy
  • Climate of the Past
  • Research Square (Research Square)

Best Publications

  • Jurassic climate mode governed by ocean gateway

    Christoph Korte;Stephen P. Hesselbo;Clemens V. Ullmann;Clemens V. Ullmann;Gerd Dietl

  • Onset of main Phanerozoic marine radiation sparked by emerging Mid Ordovician icehouse

    Christian M. Ø. Rasmussen;Clemens V. Ullmann;Kristian G. Jakobsen;Anders Lindskog

  • Evolution of the Toarcian (Early Jurassic) carbon-cycle and global climatic controls on local sedimentary processes (Cardigan Bay Basin, UK)

    Weimu Xu;Micha Ruhl;Hugh C. Jenkyns;Melanie J. Leng;Melanie J. Leng

  • Orbital pacing and secular evolution of the Early Jurassic carbon cycle

    Marisa S. Storm;Marisa S. Storm;Stephen P. Hesselbo;Hugh C. Jenkyns;Micha Ruhl;Micha Ruhl

  • Astronomical constraints on the duration of the Early Jurassic Pliensbachian Stage and global climatic fluctuations

    Micha Ruhl;Stephen P. Hesselbo;Stephen P. Hesselbo;Linda Hinnov;Hugh C. Jenkyns

  • Diagenetic alteration in low-Mg calcite from macrofossils: a review

    Clemens V. Ullmann;Christoph Korte

  • Effect of a Jurassic oceanic anoxic event on belemnite ecology and evolution.

    Clemens Vinzenz Ullmann;Nicolas Thibault;Micha Ruhl;Micha Ruhl;Stephen P. Hesselbo

  • The wider context of the Lower Jurassic Toarcian oceanic anoxic event in Yorkshire coastal outcrops, UK

    Nicolas Thibault;Micha Ruhl;Clemens V. Ullmann;Christoph Korte

  • Warm afterglow from the Toarcian Oceanic Anoxic Event drives the success of deep-adapted brachiopods.

    C V Ullmann;C V Ullmann;R Boyle;L V Duarte;S P Hesselbo

  • Partial diagenetic overprint of Late Jurassic belemnites from New Zealand: Implications for the preservation potential of δ7Li values in calcite fossils

    Clemens Vinzenz Ullmann;Clemens Vinzenz Ullmann;Hamish J. Campbell;Robert Frei;Stephen P. Hesselbo

  • The Li isotope composition of marine biogenic carbonates: Patterns and mechanisms

    Mathieu Dellinger;A. Joshua West;Guillaume Paris;Jess F. Adkins

  • Discerning primary versus diagenetic signals in carbonate carbon and oxygen isotope records: An example from the Permian–Triassic boundary of Iran

    Martin Schobben;Clemens Vinzenz Ullmann;Clemens Vinzenz Ullmann;Lucyna Leda;Dieter Korn

  • Oxygen isotope fluctuations in a modern North Sea oyster (Crassostrea gigas) compared with annual variations in seawater temperature: Implications for palaeoclimate studies

    Clemens V. Ullmann;Uwe Wiechert;Christoph Korte;Christoph Korte

  • Fungal decomposition of terrestrial organic matter accelerated Early Jurassic climate warming

    Grzegorz Pieńkowski;Marta Hodbod;Clemens V. Ullmann

  • Sinemurian–Pliensbachian calcareous nannofossil biostratigraphy and organic carbon isotope stratigraphy in the Paris Basin: Calibration to the ammonite biozonation of NW Europe

    Leonie Peti;Nicolas Thibault;Marie-Emilie Clémence;Christoph Korte

  • The Giant Pacific Oyster (Crassostrea gigas) as a modern analog for fossil ostreoids: Isotopic (Ca, O, C) and elemental (Mg/Ca, Sr/Ca, Mn/Ca) proxies

    Clemens V. Ullmann;Clemens V. Ullmann;Florian Böhm;Rosalind E.M. Rickaby;Uwe Wiechert

  • Integrated bio- and carbon-isotope stratigraphy of the Upper Cretaceous Gurpi Formation (Iran): A new reference for the eastern Tethys and its implications for large-scale correlation of stage boundaries

    Mohammad J. Razmjooei;Mohammad J. Razmjooei;Nicolas Thibault;Anoshiravan Kani;Jaume Dinarès-Turell

  • Crystallographic control on lithium isotope fractionation in Archean to Cenozoic lithium-cesium-tantalum pegmatites

    Tomas Magna;Milan Novák;Jan Cempírek;Vojtech Janousek

  • Absolute seasonal temperature estimates from clumped isotopes in bivalve shells suggest warm and variable greenhouse climate

    Niels J. de Winter;Niels J. de Winter;Inigo A. Müller;Ilja J. Kocken;Nicolas Thibault

  • Permian strontium isotope stratigraphy

    Christoph Korte;Clemens V. Ullmann

  • Chemical and isotopic architecture of the belemnite rostrum

    CV Ullmann;CV Ullmann;R Frei;C Korte;Stephen P. Hesselbo

  • Chemostratigraphy Across the Triassic–Jurassic Boundary

    Christoph Korte;Micha Ruhl;Micha Ruhl;József Pálfy;József Pálfy;Clemens Vinzenz Ullmann

Frequent Co-Authors

Christoph Korte
Christoph Korte University of Copenhagen
Stephen P. Hesselbo
Stephen P. Hesselbo University of Exeter
Nicolas Thibault
Nicolas Thibault University of Copenhagen
Micha Ruhl
Micha Ruhl Trinity College Dublin
Robert Frei
Robert Frei University of Copenhagen
Melanie J. Leng
Melanie J. Leng University of Nottingham
James B. Riding
James B. Riding British Geological Survey
Simon W. Poulton
Simon W. Poulton University of Leeds
Paul B. Wignall
Paul B. Wignall University of Leeds

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