Search Results - "Beddow, Helen M."
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Cyclostratigraphy and eccentricity tuning of the early Oligocene through early Miocene (30.1–17.1 Ma): Cibicides mundulus stable oxygen and carbon isotope records from Walvis Ridge Site 1264
Published in Earth and planetary science letters (15-09-2016)“…•Oligo-Miocene benthic foraminiferal stable O and C isotope records from Site 1264.•Recurrent episodes of high-amplitude ∼110-kyr cycles present in benthic…”
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Global change across the Oligocene‐Miocene transition: High‐resolution stable isotope records from IODP Site U1334 (equatorial Pacific Ocean)
Published in Paleoceanography (01-01-2016)“…The Oligocene‐Miocene transition (OMT) (~23 Ma) is interpreted as a transient global cooling event, associated with a large‐scale Antarctic ice sheet…”
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Evolution of the early Antarctic ice ages
Published in Proceedings of the National Academy of Sciences - PNAS (11-04-2017)“…Understanding the stability of the early Antarctic ice cap in the geological past is of societal interest because present-day atmospheric CO₂ concentrations…”
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Climate, cryosphere and carbon cycle controls on Southeast Atlantic orbital-scale carbonate deposition since the Oligocene (30–0 Ma)
Published in Climate of the past (15-10-2021)“…The evolution of the Cenozoic cryosphere from unipolar to bipolar over the past 30 million years (Myr) is broadly known. Highly resolved records of carbonate…”
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Astronomical tunings of the Oligocene–Miocene transition from Pacific Ocean Site U1334 and implications for the carbon cycle
Published in Climate of the past (05-03-2018)“…Astronomical tuning of sediment sequences requires both unambiguous cycle pattern recognition in climate proxy records and astronomical solutions, as well as…”
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Oceanography of the Eastern Equatorial Pacific Ocean Across the Oligocene‐Miocene Transition
Published in Paleoceanography and paleoclimatology (01-07-2024)“…The functioning of the Pacific Ocean—the world's largest ocean—during a warmer‐than‐present paleoclimate state remains underexplored. We present planktonic and…”
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Orbitally Forced Hyperstratification of the Oligocene South Atlantic Ocean
Published in Paleoceanography and paleoclimatology (01-05-2018)“…Pelagic sediments from the subtropical South Atlantic Ocean contain geographically extensive Oligocene ooze and chalk layers that consist almost entirely of…”
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