Search Results - "Gutjahr, Marcus"
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No detectable Weddell Sea Antarctic Bottom Water export during the Last and Penultimate Glacial Maximum
Published in Nature communications (22-01-2020)“…Weddell Sea-derived Antarctic Bottom Water (AABW) is one of the most important deep water masses in the Southern Hemisphere occupying large portions of the…”
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Very large release of mostly volcanic carbon during the Palaeocene–Eocene Thermal Maximum
Published in Nature (London) (31-08-2017)“…Boron and carbon isotope data, used in an Earth system model, show that the Palaeocene–Eocene Thermal Maximum was associated with a much greater release of…”
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Permian–Triassic mass extinction pulses driven by major marine carbon cycle perturbations
Published in Nature geoscience (01-11-2020)“…The Permian/Triassic boundary approximately 251.9 million years ago marked the most severe environmental crisis identified in the geological record, which…”
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Constraining the Variability of the Atlantic Meridional Overturning Circulation During the Holocene
Published in Geophysical research letters (28-10-2019)“…There is a converging body of evidence supporting a measurable slowdown of the Atlantic Meridional Overturning Circulation (AMOC) as climate warms and Northern…”
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5
Shelf-to-basin iron shuttle in the Guaymas Basin, Gulf of California
Published in Geochimica et cosmochimica acta (15-09-2019)“…Enrichments of highly reactive iron (Fe) (sum of Fe (oxyhydr)oxide, carbonate and sulfide minerals) in marine sediments and sedimentary rocks are commonly…”
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Substantial trace metal input from the 2022 Hunga Tonga-Hunga Ha’apai eruption into the South Pacific
Published in Nature communications (18-10-2024)“…The January 2022 eruption of the Hunga Tonga-Hunga Ha’apai (HTHH) volcano discharged 2,900 teragrams of ejecta, most of which was deposited in the South…”
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Ancient marine sediment DNA reveals diatom transition in Antarctica
Published in Nature communications (02-10-2022)“…Antarctica is one of the most vulnerable regions to climate change on Earth and studying the past and present responses of this polar marine ecosystem to…”
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Boron isotope systematics of cultured brachiopods: Response to acidification, vital effects and implications for palaeo-pH reconstruction
Published in Geochimica et cosmochimica acta (01-03-2019)“…CO2-induced ocean acidification and associated decrease of seawater carbonate saturation state contributed to multiple environmental crises in Earth’s history,…”
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Transport and transformation of riverine neodymium isotope and rare earth element signatures in high latitude estuaries: A case study from the Laptev Sea
Published in Earth and planetary science letters (01-11-2017)“…•First comprehensive seawater Nd isotope and REE data for the Laptev Sea.•Dissolved Nd isotopes, salinity and stable oxygen isotopes trace water masses.•No…”
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10
The influence of skeletal micro-structures on potential proxy records in a bamboo coral
Published in Geochimica et cosmochimica acta (01-03-2019)“…Assessing the physicochemical variability of the deeper ocean is currently hampered by limited instrumental time series and proxy records. Bamboo corals…”
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Miocene to present oceanographic variability in the Scotia Sea and Antarctic ice sheets dynamics: Insight from revised seismic-stratigraphy following IODP Expedition 382
Published in Earth and planetary science letters (01-01-2021)“…•Core-log-seismic correlation allows to assign ages to the Scotia Sea seismic record.•Major implications are derived on the relation between regional and…”
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A Geochemical Mechanism for >10 m Apparent Downward Offsets of Magnetic Reversals Inferred From Comparison of Two Scotia Sea Drill Sites
Published in Geochemistry, geophysics, geosystems : G3 (01-07-2024)“…We document an apparent downward displacement of the Matuyama‐Brunhes magnetic reversal by ∼20 m at Scotia Sea International Ocean Discovery Program Site U1538…”
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13
Neodymium and hafnium boundary contributions to seawater along the West Antarctic continental margin
Published in Earth and planetary science letters (15-05-2014)“…Neodymium and hafnium isotopes and elemental concentrations (Sm, Nd, Hf, Zr) have been measured in three water column profiles south of the Antarctic…”
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Reliable extraction of a deepwater trace metal isotope signal from Fe–Mn oxyhydroxide coatings of marine sediments
Published in Chemical geology (15-08-2007)“…The extraction of a deepwater radiogenic isotope signal from marine sediments is a powerful, though under-exploited, tool for the characterisation of past…”
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15
Sensitivity of modern climate to the presence, strength and salinity of Mediterranean-Atlantic exchange in a global general circulation model
Published in Climate dynamics (01-02-2014)“…Mediterranean Outflow Water (MOW) is thought to be a key contributor to the strength and stability of Atlantic Meridional Overturning Circulation (AMOC), but…”
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16
Arctic drainage of Laurentide Ice Sheet meltwater throughout the past 14,700 years
Published in Communications earth & environment (01-12-2022)“…Abstract During the last deglaciation substantial volumes of meltwater from the decaying Laurentide Ice Sheet were supplied to the Arctic, Gulf of Mexico and…”
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Dolomite formation in the dynamic deep biosphere: results from the Peru Margin
Published in Sedimentology (01-10-2007)“…Early diagenetic dolomite beds were sampled during the Ocean Drilling Programme (ODP) Leg 201 at four reoccupied ODP Leg 112 sites on the Peru continental…”
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The transition on North America from the warm humid Pliocene to the glaciated Quaternary traced by eolian dust deposition at a benchmark North Atlantic Ocean drill site
Published in Quaternary science reviews (01-06-2014)“…We present Plio-Pleistocene records of sediment color, %CaCO3, foraminifer fragmentation, benthic carbon isotopes (δ13C) and radiogenic isotopes (Sr, Nd, Pb)…”
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Sr- and Nd-isotope geochemistry of the Atlantis Massif (30°N, MAR): Implications for fluid fluxes and lithospheric heterogeneity
Published in Chemical geology (30-08-2008)“…The Atlantis Massif (Mid-Atlantic Ridge, 30°N) is an oceanic core complex marked by distinct variations in crustal architecture, deformation and metamorphism…”
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New Magnetostratigraphic Insights From Iceberg Alley on the Rhythms of Antarctic Climate During the Plio‐Pleistocene
Published in Paleoceanography and paleoclimatology (01-02-2021)“…International Ocean Discovery Program (IODP) Expedition 382 in the Scotia Sea’s Iceberg Alley recovered among the most continuous and highest resolution…”
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