A5063324707- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Paleontology and Stratigraphy of Fossils
- Geological Studies and Exploration
- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Polar Research and Ecology
- Geological formations and processes
- Isotope Analysis in Ecology
- Geological and Geophysical Studies
- Hydrocarbon exploration and reservoir analysis
- Cryospheric studies and observations
- Evolution and Paleontology Studies
- Geological and Geochemical Analysis
- Marine and environmental studies
- Astro and Planetary Science
- Geomagnetism and Paleomagnetism Studies
- Planetary Science and Exploration
- Seismic Imaging and Inversion Techniques
- Astronomical Observations and Instrumentation
- Geophysics and Gravity Measurements
- Geological Modeling and Analysis
- Geochemistry and Elemental Analysis
- Plant Diversity and Evolution
- Pleistocene-Era Hominins and Archaeology
Utrecht University
2016-2025
Royal Netherlands Institute for Sea Research
2016-2025
University Centre in Svalbard
2023
Northern Illinois University
2023
International Ocean Discovery Program
2023
University of Geneva
2020
Wesleyan University
2018
Yale University
2018
Japan External Trade Organization
2014
Instituto Andaluz de Ciencias de la Tierra
2014
About 34 million years ago, Earth's climate shifted from a relatively ice-free world to one with glacial conditions on Antarctica characterized by substantial ice sheets. How temperature changed during this transition remains poorly understood, and evidence for Northern Hemisphere polar is controversial. Here, we report proxy records of sea surface temperatures multiple ocean localities show that the high-latitude decrease was heterogeneous. High-latitude (45 degrees 70 in both hemispheres)...
Realistic appraisal of paleoclimatic information obtained from a particular location requires accurate knowledge its paleolatitude defined relative to the Earth's spin-axis. This is crucial to, among others, correctly assess amount solar energy received at moment sediment deposition. The an arbitrary can in principle be reconstructed tectonic plate reconstructions that (1) restore motions between plates based on (marine) magnetic anomalies, and (2) reconstruct all spin axis using...
Research Article| September 01, 2006 Extreme warming of mid-latitude coastal ocean during the Paleocene-Eocene Thermal Maximum: Inferences from TEX86 and isotope data J.C. Zachos; Zachos 1Earth Sciences Department, University California–Santa Cruz, Santa California 95060, USA Search for other works by this author on: GSW Google Scholar S. Schouten; Schouten 2Royal Netherlands Institute Sea Research, Department Marine Biogeochemistry Toxicology, P.O. Box 59, 1790 AB Den Burg, Texel, Bohaty;...
The warmest global temperatures of the past 85 million years occurred during a prolonged greenhouse episode known as Early Eocene Climatic Optimum (52–50 Ma). terminated with long-term cooling trend that culminated in continental-scale glaciation Antarctica from 34 Ma onward. Whereas early studies attributed transition to icehouse climates tectonic opening Southern Ocean gateways, more recent investigations invoked dominant role declining atmospheric gas concentrations (e.g., CO 2 )....
Significance Here, for the first time (to our knowledge), we are able to demonstrate unambiguously that impact at Cretaceous–Paleogene boundary (K–Pg, ∼66 Mya) was followed by a so-called “impact winter.” This winter result of injection large amounts dust and aerosols into stratosphere significantly reduced incoming solar radiation decades. Therefore, this phase will have been key contributory element in extinctions many biological clades, including dinosaurs. The K–Pg presents unique event...
Research Article| April 01, 2001 Global dinoflagellate event associated with the late Paleocene thermal maximum Erica M. Crouch; Crouch 1Laboratory of Palaeobotany and Palynology, Utrecht University, Budapestlaan 4, 3584 CD Utrecht, Netherlands Search for other works by this author on: GSW Google Scholar Claus Heilmann-Clausen; Heilmann-Clausen 2Geologisk Institut, Aarhus Universitet, DK-8000 C, Denmark Henk Brinkhuis; Brinkhuis 3Laboratory Hugh E.G. Morgans; Morgans 4Institute Geological...
Near the Eocene's close (∼34 million years ago), climate system underwent one of largest shifts in Earth's history: Antarctic terrestrial ice sheets suddenly grew and ocean productivity patterns changed. Previous studies conjectured that poleward penetration warm, subtropical currents, East Australian Current (EAC) particular, caused Eocene warmth. Late opening an gateway between Australia Antarctica was to have disrupted EAC, cooled Antarctica, allowed develop. Here we reconstruct...
Tectonic changes that produced a deep Tasmanian Gateway between Australia and Antarctica are widely invoked as the major mechanism for Antarctic cryosphere growth Circumpolar Current (ACC) development during Eocene/Oligocene (E/O) transition (∼34–33 Ma). Ocean Drilling Program (ODP) Leg 189 recovered near‐continuous marine sedimentary records across E/O interval at four sites around Tasmania. These largely barren of calcareous microfossils but contain rich record siliceous‐ organic‐walled...
Because of its prominent role in global biomass storage, land vegetation is the most obvious biota to be investigated for records dramatic ecologic crisis Earth history. There accumulating evidence that, throughout world, sedimentary organic matter preserved latest Permian deposits characterized by unparalleled abundances fungal remains, irrespective depositional environment (marine, lacustrine, fluviatile), floral provinciality, and climatic zonation. This event can considered reflect...
The impacts of the Paleocene‐Eocene thermal maximum (PETM) (∼55 Ma), one most rapid and extreme warming events in Earth history, are well characterized open marine terrestrial environments but less so on continental margins, a major carbon sink. Here, we present stable isotope, carbonate content, organic matter C:N ratio records through PETM from new outcrop sections California cores previously drilled New Jersey margin. Foraminifer δ 18 O data suggest that midlatitude shelves warmed by...