A5035200956- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Hydrocarbon exploration and reservoir analysis
- Paleontology and Stratigraphy of Fossils
- Geological and Geophysical Studies
- Isotope Analysis in Ecology
- Geomagnetism and Paleomagnetism Studies
- Astro and Planetary Science
- Geological and Geochemical Analysis
- Marine Biology and Ecology Research
- Atmospheric and Environmental Gas Dynamics
- Geological formations and processes
- Geophysics and Gravity Measurements
- Seismic Imaging and Inversion Techniques
- Geological Modeling and Analysis
- Evolution and Paleontology Studies
- Analytical Chemistry and Sensors
- Astronomical Observations and Instrumentation
- Spacecraft and Cryogenic Technologies
- Planetary Science and Exploration
- Offshore Engineering and Technologies
- Geochemistry and Geologic Mapping
- Nuclear Physics and Applications
- Reservoir Engineering and Simulation Methods
- Astronomy and Astrophysical Research
University of Bremen
2016-2025
University of Padua
2024
International Ocean Discovery Program
2019-2023
Tongji University
2023
Discovery Place
2023
Texas A&M University
2023
United States Office of Personnel Management
2023
Sam Houston State University
2023
University of Plymouth
2023
Geological Survey of Western Australia
2023
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...
The Paleocene‐Eocene thermal maximum (PETM) is one of the best known examples a transient climate perturbation, associated with brief, but intense, interval global warming and massive perturbation carbon cycle from injection isotopically light into ocean‐atmosphere system. One key to quantifying mass released, identifying source(s), understanding ultimate fate this develop high‐resolution age models. Two independent strategies have been employed, stratigraphy analysis extraterrestrial helium...
An impact with a dash of volcanism Around the time end-Cretaceous mass extinction that wiped out dinosaurs, there was both bolide and large amount volcanism. Hull et al. ran several temperature simulations based on different volcanic outgassing scenarios compared them records across event. The best model fits to data required most occur before impact. When combined other lines evidence, these models support an impact-driven extinction. However, gases may have played role in shaping rise...
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 Studying the dynamics of past global warming events during late Paleocene to middle Eocene informs our understanding Earth's carbon cycle behavior under elevated atmospheric pCO 2 conditions. Due sparse data coverage, spatial character numerous hyperthermal this period is still poorly constrained. Here we present a high‐resolution, benthic foraminiferal stable isotope record for northwest Pacific ODP Site 1209 (Leg 198) spanning 44 56 Ma with 5 kyr resolution. An existing section...
Abstract The Late Cretaceous–Early Paleogene is the most recent period in Earth history that experienced sustained global greenhouse warmth on multimillion year timescales. Yet, knowledge of ambient climate conditions and complex interplay between various forcing mechanisms are still poorly constrained. Here we present a 14.75 million‐year‐long, high‐resolution, orbitally tuned record paired change carbon‐cycling for this enigmatic (~67–52 Ma), which compare to an up‐to‐date compilation...
Five sections drilled in multiple holes over a depth transect of more than 2200 m at the Walvis Ridge (SE Atlantic) during Ocean Drilling Program (ODP) Leg 208 resulted first complete early Paleogene deep‐sea record. Here we present high‐resolution stratigraphic records spanning ∼4.3 million yearlong interval late Paleocene to Eocene. This includes Paleocene‐Eocene thermal maximum (PETM) as well Eocene (ETM) 2 event. A detailed chronology was developed with nondestructive X‐ray fluorescence...
We have compiled the first stratigraphically continuous high‐resolution benthic foraminiferal stable isotope record for Paleocene from a single site utilizing cores recovered at Pacific ODP Site 1209. The long‐term trend in suggests close coupling of volcanic CO 2 input and deep‐sea warming. Over short‐term is characterized by slow excursions with pronounced periodic beat related to short (100 kyr) long (405 eccentricity cycle. phase relationship between similar patterns documented Oligocene...
The Cenomanian–Turonian Boundary Event (CTBE) is reflected by one of the most extreme carbon cycle perturbations in Earth's history and characterized widespread occurrence sediments indicating oxygen deficiency oceanic waters (Oceanic Anoxic 2 = OAE 2). At Wunstorf (northern Germany) CTBE represented a 26.5 m thick sedimentary succession consisting rhythmically bedded laminated black shales, dark organic-rich marls marly limestones yielding abundant micro- macrofossils, making locality...
Abstract. To fully understand the global climate dynamics of warm early Eocene with its reoccurring hyperthermal events, an accurate high-fidelity age model is required. The Ypresian stage (56–47.8 Ma) covers a key interval within as it ranges from warmest marine temperatures in to long-term cooling trends middle Eocene. Despite recent development detailed isotope records spanning portions stage, establish complete astronomically calibrated for are still missing. Here we present new...
Timing is crucial to understanding the causes and consequences of events in Earth history. The calibration geological time relies heavily on accuracy radioisotopic astronomical dating. Uncertainties computations Earth's orbital parameters dating have hampered construction a reliable astronomically calibrated scale beyond 40 Ma. Attempts construct robust tuned for early Paleogene by integrating are only partially consistent. Here, using new La2010 La2011 solutions, we present first accurate...
The late Maastrichtian warming event was defined by a global temperature increase of ∼2.5–5 °C that occurred ∼150–300 k.y. before the Cretaceous-Paleogene (K-Pg) mass extinction. This transient has traditionally been associated with major pulse Deccan Traps (west-central India) volcanism; however, large uncertainties radiogenic dating methods have long hampered definitive correlation. Here we present new high-resolution, single species, benthic stable isotope record from South Atlantic,...
Abstract Data from International Ocean Discovery Program (IODP) Expedition 371 reveal vertical movements of 1–3 km in northern Zealandia during early Cenozoic subduction initiation the western Pacific Ocean. Lord Howe Rise rose deep (∼1 km) water to sea level and subsided back, with peak uplift at 50 Ma north between 41 32 south. The New Caledonia Trough 2–3 55 45 Ma. We suggest these elevation changes resulted crust delamination mantle flow that led slab formation. propose a “subduction...
Abstract Dark organic-rich layers (sapropels) have accumulated in Mediterranean sediments since the Miocene due to deep-sea dysoxia and enhanced carbon burial at times of intensified North African run-off during Green Sahara Periods (GSPs). The existence orbital precession-dominated Saharan aridity/humidity cycles is well known, but lack long-term, high-resolution records hinders understanding their relationship with environmental evolution. Here we present continuous, geochemical magnetic...
Abstract. Here we present a high-resolution cyclostratigraphy based on X-ray fluorescence (XRF) core scanning data from new record retrieved the tropical western Atlantic (Demerara Rise, ODP Leg 207, Site 1258). The Eocene sediments 1258 cover magnetochrons C20 to C24 and show well developed cycles. This includes missing interval for reevaluating early part of Geomagnetic Polarity Time Scale (GPTS), also providing key aspects reconstructing climate variability during Early Climatic Optimum...