Astronomical pacing of methane release in the Early Jurassic period
- D. Kemp, A. Coe, A. Cohen, L. Schwark
- Environmental Science, GeographyNature
- 15 September 2005
High-resolution organic carbon-isotope data from well-preserved mudrocks in Yorkshire, UK, are reported, providing strong evidence that methane release proceeded in three rapid pulses and that these pulses were controlled by astronomically forced changes in climate, superimposed upon longer-term global warming.
The Late Palaeocene–Early Eocene and Toarcian (Early Jurassic) carbon isotope excursions: a comparison of their time scales, associated environmental changes, causes and consequences
- A. Cohen, A. Coe, D. Kemp
- Environmental Science, GeographyJournal of the Geological Society
- 15 October 2007
Although the Earth's environment is constantly changing, there have been a few unusual episodes over the last c. 200 Ma when change was extreme in terms of its rapidity, severity, long-lasting…
Astronomical forcing and chronology of the early Toarcian (Early Jurassic) oceanic anoxic event in Yorkshire, UK
[1] During the early Toarcian (∼183 Ma ago), a high rate of organic carbon burial globally over a brief interval of time has led to the recognition of a major oceanic anoxic event (OAE). A pronounced…
An open ocean record of the Toarcian oceanic anoxic event
- D. Gröcke, R. Hori, J. Trabucho-Alexandre, D. Kemp, L. Schwark
- Environmental Science, Geography
- 11 November 2011
Abstract. Oceanic anoxic events were time intervals in the Mesozoic characterized by widespread distribution of marine organic matter-rich sediments (black shales) and significant perturbations in…
Thresholds of temperature change for mass extinctions
- Haijun Song, D. Kemp, L. Tian, Daoliang Chu, H. Song, Xu Dai
- Environmental Science, GeographyNature Communications
- 4 August 2021
The results show that both the rate and magnitude of temperature change are significantly positively correlated with the extinction rate of marine animals, and predict that a temperature increase above the pre-industrial level at present rates of increase would likely result in mass extinction comparable to that of the major Phanerozoic events, even without other, non-climatic anthropogenic impacts.
Stochastic and deterministic controls on stratigraphic completeness and fidelity
- D. Kemp
- Geology, Environmental ScienceInternational journal of earth sciences
- 23 May 2012
Compilations of sedimentation rates determined across a large range of time spans and different sedimentary environments attest to the discontinuous nature of sedimentation and support the reasoning…
Direct coupling between carbon release and weathering during the Toarcian oceanic anoxic event
Silicate weathering represents a major feedback mechanism in the Earth’s climate system, helping to stabilize atmospheric CO2 levels and temperature on million-year time scales. On shorter time…
Carbonate-platform response to the Toarcian Oceanic Anoxic Event in the southern hemisphere: Implications for climatic change and biotic platform demise
- Zhong Han, Xiumian Hu, D. Kemp, Juan Li
- Environmental Science, Geography
- 1 May 2018
A nonmarine record of eccentricity forcing through the Upper Triassic of southwest England and its correlation with the Newark Basin astronomically calibrated geomagnetic polarity time scale from…
Bailey and Smith (2008) question the veracity of the 116 cm cycle we observed in the spectral analysis and wavelet analysis of our Branscombe Mudstone time series, and, using a technique of their own…
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