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The Toarcian Oceanic Anoxic Event, also known as the Jenkyns Event, was a hyperthermal episode which occurred during the early Toarcian (c. 183 Ma; Early Jurassic) and resulted in numerous collateral effects including global warming, enhanced weathering, sea-level change, carbonate crisis, marine anoxia-dysoxia, and a second-order mass extinction. This volume presents the last advances for understanding early Toarcian environmental changes through different disciplines: biostratigraphy, micropalaeontology, palaeontology, ichnology, palaeoecology, sedimentology, integrated stratigraphy, inorganic, organic and isotopic geochemistry, and cyclostratigraphy. The study of this abrupt climate change is critical for predicting future global changes, and for understanding the complex biogeochemical interactions through time between geosphere, atmosphere, hydrosphere and biosphere.

Carbon cycle (Biogeochemistry)

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"Carbon plays a fundamental role on Earth. It forms the chemical backbone for all essential organic molecules produced by living organisms. Carbonbased fuels supply most of society's energy, and atmospheric carbon dioxide has a huge impact on Earth's climate. This book provides a complete history of the emergence and development of the new interdisciplinary field of deep carbon science. It traces four centuries of history during which the inner workings of the dynamic Earth were discovered, and documents extraordinary scientific revolutions that changed our understanding of carbon on Earth forever: carbon's origin in exploding stars; the discovery of the internal heat source driving the Earth's carbon cycle; and the tectonic revolution. Written with an engaging narrative style and covering the scientific endeavours of more than a hundred pioneers of deep geoscience, this is a fascinating book for students and researchers working in Earth system science and deep carbon research"--

Carbon. --- Carbon cycle (Biogeochemistry) --- Earth scientists --- Historical geology. --- History.

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Carbon plays a fundamental role on Earth. It forms the chemical backbone for all essential organic molecules produced by living organisms. Carbon-based fuels supply most of society's energy, and atmospheric carbon dioxide has a huge impact on Earth's climate. This book provides a complete history of the emergence and development of the new interdisciplinary field of deep carbon science. It traces four centuries of history during which the inner workings of the dynamic Earth were discovered, and documents extraordinary scientific revolutions that changed our understanding of carbon on Earth forever: carbon's origin in exploding stars; the discovery of the internal heat source driving the Earth's carbon cycle; and the tectonic revolution. Written with an engaging narrative style and covering the scientific endeavours of more than a hundred pioneers of deep geoscience, this is a fascinating book for students and researchers working in Earth system science and deep carbon research.

Carbon. --- Carbon cycle (Biogeochemistry) --- Global carbon cycle --- Biogeochemical cycles --- Group 14 elements --- Light elements

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Lithium isotopes are a relatively novel tracer of present and past silicate weathering processes. Given that silicate weathering is the primary long-term method by which CO2 is removed from the atmosphere, Li isotope research is going through an exciting phase. We show the weathering processes that fractionate dissolved and sedimentary Li isotope ratios, focusing on weathering intensity and clay formation. We then discuss the carbonate and silicate archive potential of past seawater δ7Li. These archives have been used to examine Li isotope changes across both short and long timescales. The former can demonstrate the rates at which the climate is stabilised from perturbations via weathering, a fundamental piece of the puzzle of the long-term carbon cycle.

Chemical weathering. --- Tracers (Chemistry) --- Lithium --- Silicates --- Carbon cycle (Biogeochemistry) --- Isotopes. --- Corrosion.

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This Special Issue aims to provide new insights into the issue of the mercury contamination of terrestrial and aquatic ecosystems. This ubiquitous contaminant has been used by humans for many years, resulting in global contamination. When this toxic contaminant is converted to methylmercury, it accumulates in trophic chains, which is a major issue for wildlife and human health. The nine articles contained within this Special Issue on ‘‘Mercury and Methylmercury Contamination of Terrestrial and Aquatic Ecosystems’’ endeavour to identify the historical evolution of Hg and MeHg levels in aquatic environments, and to evaluate the impact of current and historical human activities, such as mining, climate change, and soil erosion, on receptor ecosystems and food chains.

Research & information: general --- Chemistry --- Cytotoxicity --- erythrocytes --- methylmercury --- malondialdehyde --- in vitro --- superoxide dismutase --- mercury --- PQMI --- Palawan --- abandoned mines --- mine wastes --- sediments --- mussel --- mussel watch --- Mytilus --- St. Lawrence --- sediment --- water --- SPM --- gold mining --- French Guiana --- monomethylmercury --- water-sediment interface --- diel and seasonal cycles --- photodegradation --- particulate mercury --- suspended particulate matter --- particulate organic carbon --- Amazon rainforest --- mammoth fauna mammals --- hair --- environmental changes --- paleoclimate --- Pleistocene --- Yakutia --- lakes --- wet deposition --- ecological restoration --- mercury mobility --- microbial activities --- biogeochemistry --- gold mining activities --- Cytotoxicity --- erythrocytes --- methylmercury --- malondialdehyde --- in vitro --- superoxide dismutase --- mercury --- PQMI --- Palawan --- abandoned mines --- mine wastes --- sediments --- mussel --- mussel watch --- Mytilus --- St. Lawrence --- sediment --- water --- SPM --- gold mining --- French Guiana --- monomethylmercury --- water-sediment interface --- diel and seasonal cycles --- photodegradation --- particulate mercury --- suspended particulate matter --- particulate organic carbon --- Amazon rainforest --- mammoth fauna mammals --- hair --- environmental changes --- paleoclimate --- Pleistocene --- Yakutia --- lakes --- wet deposition --- ecological restoration --- mercury mobility --- microbial activities --- biogeochemistry --- gold mining activities