Leah J. LeVay
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View article: Dissociating Gas Hydrate Beneath the Hydrate Stability Zone
Dissociating Gas Hydrate Beneath the Hydrate Stability Zone Open
Vast amounts of carbon are stored beneath the seafloor in the form of methane hydrate. Hydrate is stable at moderate pressure and low temperature at a depth extending several hundred meters beneath the seafloor to the base of gas hydrate s…
View article: Geomagnetic Excursions Recorded in North Atlantic IODP Expedition 395C Sites U1555 and U1563
Geomagnetic Excursions Recorded in North Atlantic IODP Expedition 395C Sites U1555 and U1563 Open
By studying deep‐sea drilled records from the North Atlantic Ocean, several magnetic instabilities of short duration, such as the Iceland Basin (188 ka), the Björn (1,255 ka) and the Gardar (1,460 ka) excursions, were discovered. These rec…
View article: Rock magnetic proxies to infer terrigenous provenance variation on Björn Drift IODP Site U1554, preliminary results.
Rock magnetic proxies to infer terrigenous provenance variation on Björn Drift IODP Site U1554, preliminary results. Open
Reconstructing the North Atlantic Deep Water (NADW) formation and strength over time is fundamental to understanding North Atlantic and global ocean circulation and climate evolution. A multi-proxy approach on sedimentary core records can …
View article: Plio-Pleistocene Glacial-Interglacial Climate Variability as Recorded in the North-Atlantic Björn and Gardar Drift Sediments
Plio-Pleistocene Glacial-Interglacial Climate Variability as Recorded in the North-Atlantic Björn and Gardar Drift Sediments Open
International Ocean Discovery Program (IODP) Expedition 395 recovered near-continuous sedimentary records from several major contourite drift bodies in the North Atlantic Ocean. These drifts deposits are influenced by deep-water currents, …
View article: Reykjanes Mantle Convection and Climate
Reykjanes Mantle Convection and Climate Open
International audience
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: Southern Ocean and Southern African Monsoon Forcing of the Subtropical Indian Ocean Early Pliocene “Biogenic Bloom”
Southern Ocean and Southern African Monsoon Forcing of the Subtropical Indian Ocean Early Pliocene “Biogenic Bloom” Open
The Pliocene epoch emerges as a pivotal juncture in Earth's climatic evolution, characterized by pronounced warmth and elevated atmospheric carbon dioxide compared to contemporary levels. While the broader climatic context of the Pliocene …
View article: Expedition 395 Preliminary Report: Reykjanes Mantle Convection and Climate
Expedition 395 Preliminary Report: Reykjanes Mantle Convection and Climate Open
International audience
View article: IODP Expeditions 384/395C/395: Reykjanes Mantle Convection and Climate. Preliminary results
IODP Expeditions 384/395C/395: Reykjanes Mantle Convection and Climate. Preliminary results Open
International Ocean Discovery Program Expeditions 384, 395C and 395 investigated the interactions between variations in the Iceland hotspot activity, ocean crust formation at the Reykjanes Ridge, ocean circulation, and climate in the North…
View article: The Gauss and Matuyama recorded in drift sediments from the North Atlantic: preliminary study from IODP Expedition 395C.
The Gauss and Matuyama recorded in drift sediments from the North Atlantic: preliminary study from IODP Expedition 395C. Open
Drift sediments are characterized by a rapid accumulation rate (≥10 cm/kyr), which can provide high-resolution records of the geomagnetic field behavior. Previous ocean drilling in the North Atlantic (e.g., ODP Leg 162 and IODP Exp 3…
View article: Expedition 395 Scientific Prospectus Addendum: Reykjanes Mantle Convection and Climate
Expedition 395 Scientific Prospectus Addendum: Reykjanes Mantle Convection and Climate 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, w…
View article: The early to mid-Pliocene latitudinal migration of the Southern Ocean subtropical front (IODP Site U1475, Agulhas Plateau)
The early to mid-Pliocene latitudinal migration of the Southern Ocean subtropical front (IODP Site U1475, Agulhas Plateau) Open
The latitudinal migration of the Southern Ocean hydrographic fronts has been suggested to influence oceanographic conditions within the Indian-Atlantic Ocean gateway by restricting the amount of warm, saline water from the Indo-Pacific, tr…
View article: The Extending Ocean Drilling Pursuits (eODP) Project: Synthesizing Scientific Ocean Drilling Data
The Extending Ocean Drilling Pursuits (eODP) Project: Synthesizing Scientific Ocean Drilling Data Open
For over 50 years, cores recovered from ocean basins have generated fossil, lithologic, and chemical archives that have revolutionized fields within the earth sciences. Although scientific ocean drilling (SOD) data are openly available fol…
View article: The extending Ocean Drilling Pursuits (eODP) Project: Synthesizing Scientific Ocean Drilling Data
The extending Ocean Drilling Pursuits (eODP) Project: Synthesizing Scientific Ocean Drilling Data Open
For over fifty years, cores recovered from ocean basins have generated extensive fossil, lithologic, and chemical archives that have revolutionized the fields of plate tectonics and oceanography, and significantly improved our understandin…
View article: Persistent influence of precession on northern ice sheet variability since the early Pleistocene
Persistent influence of precession on northern ice sheet variability since the early Pleistocene Open
Prior to ~1 million years ago (Ma), variations in global ice volume were dominated by changes in obliquity; however, the role of precession remains unresolved. Using a record of North Atlantic ice rafting spanning the past 1.7 million year…
View article: Persistent influence of precession on northern ice sheet variability since the early Pleistocene
Persistent influence of precession on northern ice sheet variability since the early Pleistocene Open
Before ~1M years ago, variations in global ice volume were dominated by changes in obliquity but the role of precession remains unresolved. Using a record of North Atlantic ice rafting spanning the last 1.7Myr, we find that the onset of ic…
View article: Orbital and Suborbital‐Scale Variations of Productivity and Sea Surface Conditions in the Gulf of Alaska During the Past 54,000 Years: Impact of Iron Fertilization by Icebergs and Meltwater
Orbital and Suborbital‐Scale Variations of Productivity and Sea Surface Conditions in the Gulf of Alaska During the Past 54,000 Years: Impact of Iron Fertilization by Icebergs and Meltwater Open
As a high‐nutrient and low‐chlorophyll region, the modern Gulf of Alaska (GoA) is strongly impacted by the limitation of iron. Paleostudies along the Alaskan slope have mainly focused on reconstructing environmental conditions over the pas…
View article: IODP Expedition 353, Hole U1445A - Well Logging Data
IODP Expedition 353, Hole U1445A - Well Logging Data Open
Logging data are measurements of physical properties of the formation surrounding a borehole, acquired in situ after completion of coring (wireline logging) or during drilling (Logging-While-Drilling, LWD). The range of data (resistivity, …
View article: IODP Expedition 353, Hole U1445A - Well Logging Data
IODP Expedition 353, Hole U1445A - Well Logging Data Open
Logging data are measurements of physical properties of the formation surrounding a borehole, acquired in situ after completion of coring (wireline logging) or during drilling (Logging-While-Drilling, LWD). The range of data (resistivity, …
View article: Asymmetric Brittle Deformation at the Pāpaku Fault, Hikurangi Subduction Margin, NZ, IODP Expedition 375
Asymmetric Brittle Deformation at the Pāpaku Fault, Hikurangi Subduction Margin, NZ, IODP Expedition 375 Open
Quantifying fault damage zones provides a window into stress distribution and rheology around faults. International Ocean Discovery Program (IODP) Expeditions 372/375 drilled an active thrust splay fault within the Hikurangi subduction mar…
View article: Orbital and suborbital variations of productivity and sea surface conditions in the Gulf of Alaska during the past 54,000 years: Impact of iron fertilization by icebergs and meltwater
Orbital and suborbital variations of productivity and sea surface conditions in the Gulf of Alaska during the past 54,000 years: Impact of iron fertilization by icebergs and meltwater Open
As a high-nutrient and low-chlorophyll region, the modern Gulf of Alaska (GoA) is strongly impacted by the limitation of iron. Paleostudies along the Alaskan slope have mainly focused on reconstructing environmental conditions over the pas…
View article: Latitudinal Migrations of the Subtropical Front at the Agulhas Plateau Through the Mid‐Pleistocene Transition
Latitudinal Migrations of the Subtropical Front at the Agulhas Plateau Through the Mid‐Pleistocene Transition Open
The meridional variability of the Subtropical Front (STF) in the Southern Hemisphere, linked to expansions or contractions of the Southern Ocean, may have played an important role in global ocean circulation by moderating the magnitude of …