A5046375155- Geology and Paleoclimatology Research
- Paleontology and Stratigraphy of Fossils
- Isotope Analysis in Ecology
- Methane Hydrates and Related Phenomena
- Evolution and Paleontology Studies
- Geological and Geophysical Studies
- Marine and coastal ecosystems
- Microbial Community Ecology and Physiology
- Geological Studies and Exploration
- Geological formations and processes
- Climate variability and models
- Atmospheric and Environmental Gas Dynamics
- Hydrocarbon exploration and reservoir analysis
- Peatlands and Wetlands Ecology
- Geochemistry and Elemental Analysis
- Astro and Planetary Science
- Cryospheric studies and observations
- Marine Biology and Ecology Research
- Underwater Acoustics Research
- Polar Research and Ecology
- Coastal wetland ecosystem dynamics
- Climate change and permafrost
- Marine animal studies overview
- Tree-ring climate responses
- Geomagnetism and Paleomagnetism Studies
University of Bristol
2018-2024
The Open University
2024
Cabot (United States)
2016-2021
Utrecht University
2014-2018
Much of our understanding Earth's past climate comes from the measurement oxygen and carbon isotope variations in deep-sea benthic foraminifera. Yet, long intervals existing records lack temporal resolution age control needed to thoroughly categorize states Cenozoic era study their dynamics. Here, we present a new, highly resolved, astronomically dated, continuous composite foraminifer developed laboratories. Four states-Hothouse, Warmhouse, Coolhouse, Icehouse-are identified on basis...
Abstract. The early Eocene (56 to 48 million years ago) is inferred have been the most recent time that Earth's atmospheric CO2 concentrations exceeded 1000 ppm. Global mean temperatures were also substantially warmer than those of present day. As such, study climate provides insight into how a super-warm Earth system behaves and offers an opportunity evaluate models under conditions high greenhouse gas forcing. Deep Time Model Intercomparison Project (DeepMIP) systematic model–model...
Abstract. Recent studies have shown that the Early Eocene Climatic Optimum (EECO) was preceded by a series of short-lived global warming events, known as hyperthermals. Here we present high-resolution benthic stable carbon and oxygen isotope records from ODP Sites 1262 1263 (Walvis Ridge, SE Atlantic) between ~ 54 52 million years ago, tightly constraining character, timing, magnitude six prominent hyperthermal events. These which include Thermal Maximum (ETM) 2 3, are studied in relation to...
The early Eocene represents a time of major changes in the global carbon cycle and fluctuations temperatures on both short-and long-time scales. These perturbations ocean-atmosphere system have been linked to orbital forcing net organic burial, but accurate age models are required disentangle various mechanisms assess causal relationships. Discrepancies between employed astrochronological radioisotopic dating techniques prevent construction robust frame ~ 49 54 Ma. Here we present an...
Abstract. Transient greenhouse warming events in the Paleocene and Eocene were associated with addition of isotopically light carbon to exogenic atmosphere–ocean system, leading substantial environmental biotic change. The magnitude an accompanying isotope excursion (CIE) can be used constrain both sources amounts released during event also correlate marine terrestrial records high precision. Paleocene–Eocene Thermal Maximum (PETM) is well documented, but CIE for subsequent are still rare,...
Abstract The late Paleocene to early Eocene warming trend was punctuated by a series of orbitally paced transient events, associated with the release isotopically light carbon into ocean‐atmosphere system. These events occurred throughout Eocene, critically persisting during onset, peak, and termination climatic optimum (EECO) onset middle cooling. Here we present ~5.2‐Myr‐long high‐resolution benthic foraminiferal stable‐isotope record spanning peak “hothouse” from Ocean Drilling Program...
Abstract. The early Eocene (56 to 48 million years ago) is inferred have been the most recent time that Earth's atmospheric CO2 concentrations exceeded 1000 ppm. Global mean temperatures were also substantially warmer than present day. As such, study of climate provides insight into how a super-warm Earth system behaves and offers an opportunity evaluate models under conditions high greenhouse gas forcing. Deep Time Model Intercomparison Project (DeepMIP) systematic model-model model-data...
Abstract. Major variations in global carbon cycling occurred between 62 and 48 Ma, these very likely related to changes the total inventory of ocean-atmosphere system. Based on cycle theory, mass ocean should be reflected contemporaneous carbonate accumulation seafloor and, thereby, depth calcite compensation (CCD). To better constrain cause magnitude changes, community needs early Paleogene isotope records from widely separated deep-sea sediment sections, especially including Indian Ocean....
Abstract. The global and regional climate changed dramatically with the expansion of Antarctic Ice Sheet at Eocene–Oligocene transition (EOT). These large-scale changes are generally linked to declining atmospheric pCO2 levels and/or in Southern Ocean gateways such as Drake Passage around this time. To better understand Hemisphere climatic impact glaciation on Earth's oceans atmosphere EOT, we compiled a database 10 ocean 4 land-surface temperature reconstructions from range proxy records...
Abstract The Paleocene‐Eocene Thermal Maximum (PETM) and early Eocene hyperthermal events were characterized by a Hothouse climate state. Our understanding of the climatic impact these hyperthermals is currently biased toward marine settings mid‐latitudes. Here we present organic geochemical data from Stenkul Fiord, Ellesmere Island, Arctic Canada. This rich formation was deposited in high northern latitude wetland setting during late Paleocene to Eocene, spanning PETM subsequent ETM‐2...
Research Article| November 01, 2018 A 9 million-year-long astrochronological record of the early–middle Eocene corroborated by seafloor spreading rates Federica Francescone; Francescone † 1Dipartimento di Scienze Pure e Applicate, Università Urbino, Campus Scientifico "E. Mattei," 61029 Italy †Corresponding author: federica.francescone@uniurb.it. Search for other works this author on: GSW Google Scholar Vittoria Lauretano; Lauretano 2School Chemistry, University Bristol, Cantock's Close, BS8...
Abstract. Recent studies have shown that the Early Eocene Climatic Optimum (EECO) was preceded by a series of short-lived global warming events, known as hyperthermals. Here we present high-resolution benthic stable carbon and oxygen isotope records from ODP Sites 1262 1263 (Walvis Ridge, SE Atlantic) between ∼54 ∼52 million years ago, tightly constraining character, timing, magnitude six prominent hyperthermal events. These include Thermal Maximum (ETM) 2 3, are studied in relation to...
Abstract. Transient greenhouse warming events in the Paleocene and Eocene were associated with addition of isotopically-light carbon to exogenic atmosphere–ocean pool, leading substantial environmental biotic change. The magnitude an accompanying isotope excursion (CIE) can be used constrain both sources amounts released during event, as well correlate marine terrestrial records high precision. Thermal Maximum (PETM) is documented, but CIE for subsequent are still rare especially from realm....
Abstract. Oceanic Anoxic Event 2 (OAE 2) (∼ 93.5 Ma) is characterized by widespread marine anoxia and elevated burial rates of organic matter. However, the factors that led to this deoxygenation possible link with climatic change remain debated. Here, we report long-term biomarker records water-column anoxia, photic zone euxinia (PZE), sea surface temperature (SST) from Demerara Rise in equatorial Atlantic span 3.8 Myr late Cenomanian Turonian, including OAE 2. We find total carbon (TOC)...
Abstract. Global and regional climate changed dramatically with the expansion of Antarctic Ice sheet at Eocene-Oligocene Transition (EOT). These large-scale changes are generally linked to declining atmospheric pCO2 levels and/or in Southern Ocean gateways such as Drake Passage around this time. To better understand Hemisphere climatic impact glaciation on Earth’s oceans atmosphere EOT, we compiled a database sea land surface temperature reconstructions from range proxy records compared...