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View article: Paleoclimate reconstructions need better age models
Paleoclimate reconstructions need better age models Open
Timing is important for comprehending Earth's biological and climatic processes shaping evolution, extinction, and recovery. Causes and consequences of changing climate can be unraveled only if geological proxy data from different regions …
View article: Timing Is Everything
Timing Is Everything Open
Deep ocean sediments document past environmental changes over space and time. The information gleaned from such deposits allows scientists to test climate models that are used to predict future climate change. However, the causes and conse…
View article: ADVANCING INDIVIDUAL FORAMINIFERA ANALYSIS BY COMBINING MOLECULAR, MORPHOMETRIC, AND TRACE ELEMENT GEOCHEMISTRY
ADVANCING INDIVIDUAL FORAMINIFERA ANALYSIS BY COMBINING MOLECULAR, MORPHOMETRIC, AND TRACE ELEMENT GEOCHEMISTRY Open
Planktic foraminifera are widely used as paleoclimate proxies. Foraminiferal species are identified morphologically, but research has revealed that many species contain cryptic genetic diversity. Here, we advance a workflow analyzing the g…
View article: Long- and short-term coupling of sea surface temperature and atmospheric CO <sub>2</sub> during the late Paleocene and early Eocene
Long- and short-term coupling of sea surface temperature and atmospheric CO <sub>2</sub> during the late Paleocene and early Eocene Open
The late Paleocene and early Eocene (LPEE) are characterized by long-term (million years, Myr) global warming and by transient, abrupt (kiloyears, kyr) warming events, termed hyperthermals. Although both have been attributed to greenhouse …
View article: CO2PIP Consortium for Advancing paleo-CO2 reconstruction and Building the Next-Generation Phanerozoic CO2 Record
CO2PIP Consortium for Advancing paleo-CO2 reconstruction and Building the Next-Generation Phanerozoic CO2 Record Open
Paleo-CO2 reconstructions are integral to understanding the evolution of Earth system processes and their interactions given that atmospheric CO2 concentrations are intrinsically linked to planetary function. Furthermore, past periods of m…
View article: Toward a Cenozoic history of atmospheric CO <sub>2</sub>
Toward a Cenozoic history of atmospheric CO <sub>2</sub> Open
The geological record encodes the relationship between climate and atmospheric carbon dioxide (CO 2 ) over long and short timescales, as well as potential drivers of evolutionary transitions. However, reconstructing CO 2 beyond direct meas…
View article: Biomineralization and biomechanical trade-offs under heterogeneous environments in the eastern oyster<i>Crassostrea virginica</i>
Biomineralization and biomechanical trade-offs under heterogeneous environments in the eastern oyster<i>Crassostrea virginica</i> Open
Accurate biological models are critical to reliably predict vulnerability of marine organisms and ecosystems to rapid environmental changes. Current predictions on the biological impacts of climate change and human-caused disturbances prim…
View article: New Calcium Carbonate Nano‐particulate Pressed Powder Pellet (NFHS‐2‐NP) for LA‐ICP‐OES, LA‐(MC)‐ICP‐MS and µXRF
New Calcium Carbonate Nano‐particulate Pressed Powder Pellet (NFHS‐2‐NP) for LA‐ICP‐OES, LA‐(MC)‐ICP‐MS and µXRF Open
A new matrix‐matched reference material has been developed – NFHS‐2‐NP (NIOZ Foraminifera House Standard‐2‐Nano‐Pellet) – with element mass fractions, and isotope ratios resembling that of natural foraminiferal calcium carbonate. A 180–355…
View article: Symbiont Photosynthesis and Its Effect on Boron Proxies in Planktic Foraminifera
Symbiont Photosynthesis and Its Effect on Boron Proxies in Planktic Foraminifera Open
Boron proxies in the calcium carbonate shells of planktic foraminifera are sensitive to seawater acidity, but B/Ca ratios and isotopic composition (i.e., δ 11 B) recorded by different foraminifer species grown under identical environmental…
View article: Sub‐Permil Interlaboratory Consistency for Solution‐Based Boron Isotope Analyses on Marine Carbonates
Sub‐Permil Interlaboratory Consistency for Solution‐Based Boron Isotope Analyses on Marine Carbonates Open
Boron isotopes in marine carbonates are increasingly used to reconstruct seawater pH and atmospheric pCO 2 through Earth’s history. While isotope ratio measurements from individual laboratories are often of high quality, it is important th…
View article: The seawater carbon inventory at the Paleocene–Eocene Thermal Maximum
The seawater carbon inventory at the Paleocene–Eocene Thermal Maximum Open
Significance During the Paleocene–Eocene Thermal Maximum (PETM) (56 Mya), the planet warmed by 5 to 8 °C, deep-sea organisms went extinct, and the oceans rapidly acidified. Geochemical records from fossil shells of a group of plankton call…
View article: Perturbations in Antarctic bottom water formation in the Atlantic sector of the Southern Ocean during the last peak interglacial period
Perturbations in Antarctic bottom water formation in the Atlantic sector of the Southern Ocean during the last peak interglacial period Open
<p>Interglacial climate conditions are generally characterized by relatively strong and persistent deep-water formation both in the North Atlantic and in the Southern Ocean, and overall &#8216;stable&#8217; climate conditions…
View article: Isotopic and elemental mapping of bamboo corals &#8211; reference to calcification mechanism and proxy applications
Isotopic and elemental mapping of bamboo corals – reference to calcification mechanism and proxy applications Open
<p>Bamboo corals are calcitic octocorals dwelling in a broad range of water depths and in all ocean basins. Their skeletons could give insight into the temporal variability of environmental parameters at their growth locations, in ar…
View article: The Magnitude of Surface Ocean Acidification and Carbon Release During Eocene Thermal Maximum 2 (ETM‐2) and the Paleocene‐Eocene Thermal Maximum (PETM)
The Magnitude of Surface Ocean Acidification and Carbon Release During Eocene Thermal Maximum 2 (ETM‐2) and the Paleocene‐Eocene Thermal Maximum (PETM) Open
Eocene Thermal Maximum 2 (ETM‐2; 54.1 Ma) was the second largest Eocene hyperthermal. Like the Paleocene‐Eocene Thermal Maximum (PETM), ETM‐2 was characterized by massive carbon emissions and several degrees of global warming and thus can …
View article: Mg/Ca, Ba/Ca, Mg vs. S and fluorescence measured with EMPA, CRM and LA-ICP-MS in a bamboo coral from the Blake Plateau
Mg/Ca, Ba/Ca, Mg vs. S and fluorescence measured with EMPA, CRM and LA-ICP-MS in a bamboo coral from the Blake Plateau Open
Assessing the physicochemical variability of the deeper ocean is currently hampered by limited instrumental time series and proxy records. Bamboo corals (Isididae) form a cosmopolitan family of calcitic deep sea corals that could fill this…
View article: Stable isotope ratios, and trace elements from Pacific and S. Atlantic mid-latitudes across Eocene Thermal Maximum 2 and the Paleocene-Eocene Thermal Maximum
Stable isotope ratios, and trace elements from Pacific and S. Atlantic mid-latitudes across Eocene Thermal Maximum 2 and the Paleocene-Eocene Thermal Maximum Open
Eocene Thermal Maximum 2 (ETM‐2; 54.1 Ma) was the second largest Eocene hyperthermal. Like the Paleocene‐Eocene Thermal Maximum (PETM), ETM‐2 was characterized by massive carbon emissions and several degrees of global warming and thus can …
View article: Early Pleistocene Obliquity‐Scale pCO<sub>2</sub> Variability at ~1.5 Million Years Ago
Early Pleistocene Obliquity‐Scale pCO<sub>2</sub> Variability at ~1.5 Million Years Ago Open
In the early Pleistocene, global temperature cycles predominantly varied with ~41‐kyr (obliquity‐scale) periodicity. Atmospheric greenhouse gas concentrations likely played a role in these climate cycles; marine sediments provide an indire…
View article: Capturing the global signature of surface ocean acidification during the Palaeocene–Eocene Thermal Maximum
Capturing the global signature of surface ocean acidification during the Palaeocene–Eocene Thermal Maximum Open
Geologically abrupt carbon perturbations such as the Palaeocene–Eocene Thermal Maximum (PETM, approx. 56 Ma) are the closest geological points of comparison to current anthropogenic carbon emissions. Associated with the rapid carbon releas…
View article: Isotopic composition of benthic and planktic foraminifera and bulk sediment from ODP Holes198-1209A and 208-1265A
Isotopic composition of benthic and planktic foraminifera and bulk sediment from ODP Holes198-1209A and 208-1265A Open
Eocene Thermal Maximum 2 (ETM-2; ca. 54.2 Ma) represents the second largest of the major Eocene hyperthermals, yet comparatively little is known about the scale and rate of climatic change for key regions. Here we provide the first detaile…
View article: Supplementary material from "Capturing the global signature of surface ocean acidification during the Palaeocene–Eocene Thermal Maximum"
Supplementary material from "Capturing the global signature of surface ocean acidification during the Palaeocene–Eocene Thermal Maximum" Open
Geologically abrupt carbon perturbations such as the Palaeocene–Eocene Thermal Maximum (PETM, approx. 56 Ma) are the closest geological points of comparison to current anthropogenic carbon emissions. Associated with the rapid carbon releas…
View article: Barium/calcium ratios in planktic foraminifer Neogloboquadrina dutertrei
Barium/calcium ratios in planktic foraminifer Neogloboquadrina dutertrei Open
Dataset contains seawater and foraminiferal chemical composition from the paper referenced above. Paper abstract: Ba/Ca ratios in many non-spinose planktic foraminifera are markedly higher than those observed in spinose planktic species, b…