Toarcian Climate and Carbon Cycle Perturbations

A special issue of Geosciences (ISSN 2076-3263). This special issue belongs to the section "Climate".

Deadline for manuscript submissions: closed (15 December 2022) | Viewed by 321

Special Issue Editor

Department of Organic and Isotope Geochemistry, Institute of Geoscience, University of Kiel, Kiel, Germany
Interests: geochemistry; chemostratigraphy; paleoclimate; biosphere–geosphere interaction; biogeochemical cycles

Special Issue Information

Dear Colleagues,

The early Toarcian (Early Jurassic, c. 183 Ma) was characterized by severe global-scale environmental perturbations. These included recurrent perturbations of the carbon cycle that manifested in negative and positive carbon isotope excursions, drastic climate fluctuations, changes in continental weathering, high-amplitude sea level fluctuations, the spread of anoxic conditions in marine (and lacustrine) areas, and profound ecosystem disturbances. Paleoenvironmental changes occurred in close temporal relation to the emplacement of the Karoo-Ferrar Large Igneous Province in southern Gondwana. This suggests that greenhouse gas emission (CO2, CH4) from intensified volcanism was an important driver of environmental change. However, the orbitally forced cyclicity that has been documented in various environmental parameters indicates that flood basalt volcanism was not the sole driver of early Toarcian environmental change.

Despite the numerous studies that focus on early Toarcian environmental perturbation, controversy persists regarding the causes and timing of environmental change. In particular, the role of greenhouse gas emissions from volcanic and from climate-sensitive carbon sources, such as gas hydrates, permafrost areas, and wetlands, is subject of ongoing discussion. Moreover, interrelationships between various environmental phenomena are poorly understood and are in the focus subject of ongoing research.

This Special Issue aims to assemble original research papers as well as review papers dealing with different aspects of the early Toarcian climate and carbon cycle perturbations. Articles dealing with topics such as stratigraphy, sedimentology, paleontology, geochemistry, paleoclimate, paleogeography, and modeling are welcome.

Dr. Wolfgang Ruebsam
Guest Editor

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Keywords

  • Paleoclimate
  • Climate change
  • Biogeochemical cycles
  • Ocean deoxygenation
  • Oceanic anoxic event
  • Ecosystem disturbances

Published Papers

There is no accepted submissions to this special issue at this moment.
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