Yair Rosenthal
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View article: Major sea level fall during the Pliocene M2 glaciation
Major sea level fall during the Pliocene M2 glaciation Open
The extent of ice growth during the Pliocene M2 glaciation (~3.3 Ma) has been called into question, with benthic foraminiferal oxygen isotope records interpreted primarily as a cooling signal. Here we improve the benthic foraminiferal Mg/C…
View article: Mean ocean temperature change and decomposition of the benthic <i>δ</i> <sup>18</sup> O record over the past 4.5 million years
Mean ocean temperature change and decomposition of the benthic <i>δ</i> <sup>18</sup> O record over the past 4.5 million years Open
We use a recent reconstruction of global mean sea surface temperature change relative to preindustrial (ΔGMSST) over the last 4.5 Myr together with independent proxy-based reconstructions of bottom water (ΔBWT) or deep-ocean (ΔDOT) tempera…
View article: Pore Fluid Origins, Circulation, and Links With Methane Hydrate on the South‐Central Chilean Margin
Pore Fluid Origins, Circulation, and Links With Methane Hydrate on the South‐Central Chilean Margin Open
The chemical composition of marine sedimentary pore waters, notably freshening signals inferred from decreases in dissolved Cl − , have demonstrated a link between methane hydrate accumulation and the circulation of fluids and gases in con…
View article: Footprint of sustained poleward warm water flow within East Antarctic submarine canyons
Footprint of sustained poleward warm water flow within East Antarctic submarine canyons Open
The intrusion of relatively warm Circumpolar Deep Water (CDW) onto the Antarctic continental shelf is widely recognized as a threat to ice shelves and glaciers grounded below sea level, as enhanced ocean heat increases their basal melt. CD…
View article: Sea surface temperature reconstructions using Mg/Ca of two mixed layer foraminifera species in the western Pacific warm pool for the last 4 Myr
Sea surface temperature reconstructions using Mg/Ca of two mixed layer foraminifera species in the western Pacific warm pool for the last 4 Myr Open
Climate condition of the Plio-Pleistocene is characterized by global cooling and intensification of the Northern Hemisphere Icesheet. During this time period, sea surface temperatures (SSTs) both at mid and high latitudes showed long-term …
View article: Tracing Ocean Oxygen Dynamics Through Time: A Miocene Perspective
Tracing Ocean Oxygen Dynamics Through Time: A Miocene Perspective Open
Foraminifera-bound nitrogen isotopes (FB-δ15N) are a powerful tool for reconstructing past oxygen-deficient zones (ODZs). FB-δ15N record the strong isotopic fractionation associated with bacterial water column denitrification that occurs i…
View article: Linear and Nonlinear Responses&#160;of Annual Mean Sea Surface Temperature to Orbital Forcing
Linear and Nonlinear Responses of Annual Mean Sea Surface Temperature to Orbital Forcing Open
The response of mean annual sea surface temperature (MASST) to orbital insolation forcing has remained not well understood. Here, we study the MASST response to orbital forcing in a climate model simulation of the last 200,000 years. Our r…
View article: Site U1554
Site U1554 Open
International audience
View article: Site U1602
Site U1602 Open
International audience
View article: Site U1555
Site U1555 Open
International audience
View article: Site U1562
Site U1562 Open
International audience
View article: Expedition 395 summary
Expedition 395 summary Open
The intersection between the Mid-Atlantic Ridge and Iceland hotspot provides a natural laboratory where the composition and dynamics of Earth's upper mantle can be observed. Plume-ridge interaction drives variations in the melting regime, …
View article: Expedition 395 methods
Expedition 395 methods Open
International audience
View article: Site U1564
Site U1564 Open
International audience
View article: Site U1563
Site U1563 Open
International audience
View article: Insolation-triggered Eurasian Ice Sheets collapse initiates the Last Termination
Insolation-triggered Eurasian Ice Sheets collapse initiates the Last Termination Open
The collapse of Northern Hemisphere ice sheets has been deemed as a trigger for the chain of positive climate feedback during glacial terminations in Quaternary. Increasing boreal summer insolation is considered the ultimate driver of thei…
View article: Proteomic characterization of a foraminiferal test’s organic matrix
Proteomic characterization of a foraminiferal test’s organic matrix Open
Foraminifera are unicellular protists capable of precipitating calcite tests, which fossilize and preserve geochemical signatures of past environmental conditions dating back to the Cambrian period. The biomineralization mechanisms respons…
View article: Mean ocean temperature change and decomposition of the benthic δ <sup>18</sup> O record over the last 4.5 Myr
Mean ocean temperature change and decomposition of the benthic δ <sup>18</sup> O record over the last 4.5 Myr Open
We use a recent compilation of global mean sea surface temperature changes (ΔGMSST) over the last 4.5 Myr together with independent proxy-based reconstructions of bottom water or deep ocean temperatures to infer changes in mean ocean tempe…
View article: Controls on Sr/Ca, S/Ca, and Mg/Ca in Benthic Foraminifera: Implications for the Carbonate Chemistry of the Pacific Ocean Over the Last 350 ky
Controls on Sr/Ca, S/Ca, and Mg/Ca in Benthic Foraminifera: Implications for the Carbonate Chemistry of the Pacific Ocean Over the Last 350 ky Open
Boron to calcium (B/Ca) records in benthic foraminifera, used for reconstructing the carbonate ion saturation state (ΔCO 3 ) of the deep ocean, suggest that carbon sequestration in the Southern Pacific contributed to lowering atmospheric C…
View article: Impact of Seawater Inorganic Carbon Chemistry on Element Incorporation in Foraminiferal Shell Carbonate
Impact of Seawater Inorganic Carbon Chemistry on Element Incorporation in Foraminiferal Shell Carbonate Open
Reconstruction of the marine inorganic carbon system relies on proxy signal carriers, such as element/calcium (El/Ca) ratios in foraminiferal shells. Concentrations of boron, lithium, strontium, and sulfur have been shown to vary with carb…
View article: Sulfur incorporation in (foraminiferal) calcite
Sulfur incorporation in (foraminiferal) calcite Open
Sulfur over calcium ratio (S/Ca) in foraminiferal calcite has been suggested as a potential tool to reconstruct seawater carbonate ion concentration ([CO32-]). The approach of using sulfur incorporation as a proxy for the carbon system was…
View article: A Revisionist View of the Mid-Pleistocene Transition
A Revisionist View of the Mid-Pleistocene Transition Open
The Mid-Pleistocene Transition (MPT) is commonly characterized as a change in both temperature and ice volume from smaller amplitude, 41-kyr variability to higher amplitude, ~100-kyr variability in the absence of any significant change in …
View article: Southern Ocean Biological Pump Role in Driving Holocene Atmospheric CO<sub>2</sub>: Reappraisal
Southern Ocean Biological Pump Role in Driving Holocene Atmospheric CO<sub>2</sub>: Reappraisal Open
Changes in Southern Ocean biological pump efficiency are frequently invoked as a source of glacial/interglacial CO 2 variability. It was recently suggested that Southern Ocean biological pump weakening also contributed to Holocene CO 2 inc…
View article: Global and regional temperature change over the past 4.5 million years
Global and regional temperature change over the past 4.5 million years Open
Much of our understanding of Cenozoic climate is based on the record of δ 18 O measured in benthic foraminifera. However, this measurement reflects a combined signal of global temperature and sea level, thus preventing a clear understandin…
View article: Global Mean and Relative Sea-Level Changes Over the Past 66 Myr: Implications for Early Eocene Ice Sheets
Global Mean and Relative Sea-Level Changes Over the Past 66 Myr: Implications for Early Eocene Ice Sheets Open
We estimate ice-volume driven (barystatic; BSL) sea-level changes for the Cenozoic using new Mg/Ca data from 58 to 48 Ma and a revised analysis of Mg/Ca trends over the past 66 Myr. We combine records of BSL, temperature-driven sea level, …