Výsledky vyhledávání - "Leopoldo D. Pena"

Nonlinear increase in seawater 87Sr/86Sr in the Oligocene to early Miocene and implications for climate-sensitive weathering

Autor: Heather M. Stoll, Leopoldo D. Pena, Ivan Hernandez-Almeida, José Guitián, Thomas Tanner, Heiko Paelike

The 87Sr/86Sr of marine carbonates provides a key constraint on the balance of continental weathering and hydrothermal Sr fluxes to the ocean, and mid-Oligocene to mid-Miocene features the most rapid rates of increase in the 87Sr/86Sr of the Cenozoic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::68e4aa6897cef75169de4a74314c9b49
https://cp.copernicus.org/preprints/cp-2023-29/

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Assessing neodymium isotopes as an ocean circulation tracer in the Southwest Atlantic

Autor: Yingzhe Wu, Leopoldo D. Pena, Robert F. Anderson, Alison E. Hartman, Louise L. Bolge, Chandranath Basak, Joohee Kim, Micha J.A. Rijkenberg, Hein J.W. de Baar, Steven L. Goldstein

Publikováno v: Earth and planetary science letters, 599:117846. ELSEVIER SCIENCE BV

The global overturning ocean circulation plays a key role in global climate by distributing heat around the Earth and by triggering or amplifying major climate changes. Neodymium (Nd) isotopes are widely used to trace present-day and past ocean circu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7e6b89bbf5289419a0a8c893bad80a7a
https://www.vliz.be/imisdocs/publications/75/385375.pdf

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Evidence for a Northern Hemispheric trigger of the 100,000-y glacial cyclicity

Autor: Alberto Malinverno, M. Yehudai, Leopoldo D. Pena, J. Kim, Steven L. Goldstein, Maria Jaume-Seguí, Louise Bolge, K. P. Knudson, Torsten Bickert

Publikováno v: Proc Natl Acad Sci U S A

The causes of the Mid-Pleistocene Transition, the shift from ∼41-ky to 100-ky interglacial–glacial cycles and more intense ice ages, remain intensely debated, as this fundamental change occurred between ∼1,250 and 650 ka without substantial cha

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d25143cc9c511ff99cd3bb0ff94c88ad
https://doi.org/10.1073/pnas.2020260118

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Neodymium and Strontium isotopes as source indicators for terrigenous sediments deposited in NE Brazil

Autor: Leopoldo D. Pena, Itxaso Ruiz

Publikováno v: BOLETÍN GEOLÓGICO Y MINERO. 129:636-646

espanolEste estudio investiga el origen sedimentario de los materiales depositados por el rio Amazonas durante los ultimos 30 kyr BP y reconstruye el patron de precipitacion del area fuente. Para ello, se han utilizado quince muestras de un registro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::217901365da2146c593cf7a27fdfef94
https://doi.org/10.21701/bolgeomin.129.4.003

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The response of calcareous plankton to the Sapropel S1 interval in North Ionian Sea

Autor: Antonio Cascella a, Sergio Bonomo a, b, Fabrizio Lirer c, Giulia Margaritelli d, Helena Checa e, Isabel Cacho e, Leopoldo D. Pena e, Jaime Frigola e

Publikováno v: Global and Planetary Change
Global and planetary change
(2021). doi:10.1016/j.gloplacha.2021.103599
info:cnr-pdr/source/autori:Antonio Cascella a,*, Sergio Bonomo a, b, Fabrizio Lirer c, Giulia Margaritelli d, Helena Checa e, Isabel Cacho e, Leopoldo D. Pena e, Jaime Frigola e/titolo:The response of calcareous plankton to the Sapropel S1 interval in North Ionian Sea/doi:10.1016%2Fj.gloplacha.2021.103599/rivista:Global and planetary change (Print)/anno:2021/pagina_da:/pagina_a:/intervallo_pagine:/volume

A high resolution study of calcareous nannofossils has been performed on samples from the Sapropel S1interval deposited in the North Ionian Sea, with the aim to assess the paleoenvironmental changes in the photic zone during this crucial interval in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::350789fa02275b82cefde5197bbfcac7
http://hdl.handle.net/11573/1611751

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Surface hydrographic changes at the western flank of the sicily channel associated with the last sapropel

Autor: Fabrizio Lirer, Sergio Trias-Navarro, Leopoldo D. Pena, Isabel Cacho, Maria de la Fuente, Antonio Caruso, Jaime Frigola

Publikováno v: Dipòsit Digital de la UB
Universidad de Barcelona
Global and Planetary Change

In the eastern Mediterranean Sea, the early Holocene was characterized by major climatic and oceanographic changes that led to the formation of the last sapropel (S1) between 10.8 and 6.1 kyr cal. BP. These hydrographic changes might have altered the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::121095138cea1ce2b39d3751f740dbd0
http://hdl.handle.net/2445/179823

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A User‐Friendly Workbook to Facilitate Rapid and Accurate Rare Earth Element Analyses by ICP‐MS for Multispiked Samples

Autor: Sidney R. Hemming, Y. Wu, D. K. McDaniel, Chandranath Basak, K. M. Jones, Leopoldo D. Pena, Louise Bolge, Steven L. Goldstein

Publikováno v: Dipòsit Digital de la UB
Universidad de Barcelona

The rare earth elements (REEs) are widely used as geochemical tracers in the earth, planetary, and ocean sciences. Inductively coupled plasma‐mass spectrometry (ICP‐MS) has become the method of choice to analyze REE concentrations because it can

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b0607f99a7a5e09b1658f1c9c1e460c7
http://hdl.handle.net/2445/175058

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