A5073969859- Geology and Paleoclimatology Research
- Paleontology and Stratigraphy of Fossils
- Isotope Analysis in Ecology
- Astro and Planetary Science
- Climate variability and models
- Evolution and Paleontology Studies
- Marine Bivalve and Aquaculture Studies
- Climate Change, Adaptation, Migration
- Geological formations and processes
- Marine Biology and Ecology Research
- Species Distribution and Climate Change
- Marine and environmental studies
- Cephalopods and Marine Biology
- Archaeology and ancient environmental studies
- Groundwater and Isotope Geochemistry
- Oceanographic and Atmospheric Processes
- Tree-ring climate responses
Utrecht University
2022-2024
Royal Netherlands Institute for Sea Research
2022-2024
Clumped isotope thermometry can independently constrain the formation temperatures of carbonates, but a lack precisely temperature-controlled calibration samples limits its application on aragonites. To address this issue, we present clumped compositions aragonitic bivalve shells grown under highly controlled (1-18°C), which combine with data from natural and synthetic aragonites wide range (1-850°C). We observe no discernible offset in values between foraminifera, mollusks, abiogenic or...
Documenting the seasonal temperature cycle constitutes an essential step toward mitigating risks associated with extreme weather events in a future warmer world. The mid-Piacenzian Warm Period (mPWP), 3.3 to 3.0 million years ago, featured global temperatures approximately 3°C above preindustrial levels. It represents ideal period for directed paleoclimate reconstructions equivalent model projections 2100 under moderate Shared Socioeconomic Pathway SSP2-4.5. Here, clumped isotope analyses of...
Anthropogenic global change necessitates the improvement of our understanding dynamics warmer climates in past. Combining information from Earth’s climate history with numerical simulations past helps us to identify gaps knowledge mechanisms and improves projections for future climate1,2. Data assimilation is a valuable tool reconcile reconstructions models consistent statistical framework3. These data efforts have focused mostly on variability geological timescales (thousands...
Bivalve mollusc shells have proven to be promising recorders of environmental variability on short time-scales: incremental growth over their lifetimes (~ 1 – 100 years) allows for high resolution temporal sampling in carbonate shells1. Seasonal and even daily successfully been reconstructed using fossil shells, e.g. 2–4.However, these are not made up pure carbonates but also contain organic matter internal fluids5. Understanding the formation pathways associated isotopic...
The early to middle Eocene (56 – 41 Ma) is characterized by high atmospheric CO2 concentrations between 1,000 and 1,500 ppm, making it the warmest interval of Cenozoic [1,2]. future concentration could reach similar levels around 2100, based on emissions scenario SSP5-8.5 [3]. By studying climate, we gain understanding how our climate system operate under these extreme conditions.An important aspect seasonal temperature variability: differences summer winter temperatures. Past...
Abstract Estimates of global mean near‐surface air temperature (global SAT) for the Cenozoic era rely largely on paleo‐proxy data deep‐sea (DST), with assumption that changes in SAT covary DST) and sea‐surface SST). We tested validity this by analyzing relationship between SST, SAT, DST using 25 different model simulations from Deep‐Time Model Intercomparison Project simulating early Eocene Climatic Optimum (EECO) varying CO 2 levels. Similar to modern situation, we find limited spatial...
Earth and Space Science Open Archive This preprint has been submitted to is under consideration at Geophysical Research Letters. ESSOAr a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing an older version [v1]Go new versionTemperature dependence of clumped isotopes (∆47) in aragoniteAuthorsNiels Jonathande WinteriDRobWitbaardIlja JaphirKockeniDInigo...
Rationale Embedding resins are widely used to fix carbonates for high‐precision sample preparation and high‐resolution sampling. However, these embedding materials difficult remove after known affect the accuracy of carbonate stable isotope analyses. Nevertheless, their impact on clumped analysis, which is particularly sensitive contamination artifacts, has so far not been tested. The observation that running resin‐containing samples decreased reproducibility values internal laboratory...
Our current understanding of global mean near-surface (land and sea) air temperature (GMSAT) during the Cenozoic era relies on paleo-proxy estimates deep-sea combined with assumed relationships between (GMDST), sea-surface (GMSST), GMSAT. The validity these assumptions is essential in our past climate states such as Early Eocene Climate Optimum hothouse (EECO, 56–48 Ma). EECO remains relevant today, because EECO-like CO2 levels are possible 22nd century under continued high emissions. We...
Accurate projections of future climate scenarios require a detailed understanding the behavior Earth’s system under varying radiative forcing scenarios. The mid-Piacenzian Warm Period (mPWP; 3.3 – 3.0 Ma) was characterized by atmospheric CO2 concentrations comparable to present-day values (~400 ppmV), while global mean annual temperatures were roughly 2-3 degrees warmer compared pre-industrial (Haywood et al., 2020). Seasonally resolved records from fossil bivalve shells...
<p>Under continued high anthropogenic CO<sub>2</sub> emissions, the atmospheric concentration around 2100 will be like that of Early Eocene Climate Optimum (EECO, 56–48 Ma) hothouse period. Hence, reconstructions EECO climate give insight into workings system under possible future conditions. Our current understanding global mean surface temperature (GMST) during Cenozoic era relies on paleo-proxy estimates deep-sea (DST) combined with...
Clumped isotope thermometry can independently constrain the formation temperatures of carbonates, but a lack precisely temperature-controlled calibration samples limits its application on aragonites. To address this issue, we present clumped compositions aragonitic bivalve shells grown under highly controlled (1‒18°C), which combine with data from natural and synthetic aragonites wide range (1‒850°C). We observe no discernible offset in values between foraminifera, mollusks, abiogenic or...
Our current understanding of global mean near-surface (land and sea) air temperature (GMSAT) during the Cenozoic era relies on paleo-proxy estimates deep-sea combined with assumed relationships between (GMDST), sea-surface (GMSST), GMSAT. The validity these assumptions is essential in our past climate states such as Early Eocene Climate Optimum hothouse (EECO, 56–48 Ma). EECO remains relevant today, because EECO-like CO2 levels are possible 22nd century under continued high emissions. We...