Výsledky vyhledávání - "Steven A Hovan"

Dynamic carbonate sedimentation on the Northern Line Islands Ridge, Palmyra Basin

Autor: Mitchell W Lyle, Katherine Wejnert, Heather L Ford, Christina King Wertman, Allison W Jacobel, Pratigya J. Polissar, Jean Lynch-Stieglitz, Julia Shackford Wilson, Steven A Hovan, Richard W. Murray, Ruifang C. Xie, Ann G Dunlea, Ashley E. Maloney, Robert A. Pockalny, S. C. Bova, Jennifer E. Hertzberg

Publikováno v: Marine Geology. 379:194-207

The Line Islands Ridge (LIR), located south of the Hawaiian Islands between 7°N and 1°S, is one of the few large central Pacific regions shallower than the regional carbonate compensation depth. Thick sequences of carbonate sediments have accumulat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::99e27a903bf0ba110d2b1266b0a3d1d0
https://doi.org/10.1016/j.margeo.2016.06.005

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Glacial-interglacial changes in central tropical Pacific surface seawater property gradients

Autor: Christina A. Wertman, Allison W Jacobel, Steven A Hovan, A. Christina Ravelo, Richard W. Murray, Ruifang C. Xie, S. C. Bova, Mitchell W Lyle, Julia K. Shackford, Katherine Wejnert, Ashley E. Maloney, Jennifer E. Hertzberg, Pratigya J. Polissar, Robert A. Pockalny, Jean Lynch-Stieglitz, Ann G Dunlea, Heather L Ford

Publikováno v: Paleoceanography. 30:423-438

Much uncertainty exists about the state of the oceanic and atmospheric circulation in the tropical Pacific over the last glacial cycle. Studies have been hampered by the fact that sediment cores suitable for study were concentrated in the western and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1b68d60371860359b3948c5ad647b0c3
https://doi.org/10.1002/2014pa002746

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A deep Eastern Equatorial Pacific thermocline during the early Pliocene warm period

Autor: A. Christina Ravelo, Heather L Ford, Steven A Hovan

Publikováno v: Earth and Planetary Science Letters. :152-161

During the early Pliocene warm period (∼4.6–4.2 Ma) in the Eastern Equatorial Pacific upwelling region, sea surface temperatures were warm in comparison to modern conditions. Warm upwelling regions have global effects on the heat budget and atmos

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::72daf59a542e8ae79f506f30807f4c61
https://doi.org/10.1016/j.epsl.2012.08.027

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Miocene to recent eolian dust record from the Southwest Pacific Ocean at 40° S latitude

Autor: Robert M. Owen, Chris M. Hall, Andrea M. Stancin, James D. Gleason, Joel D. Blum, David K. Rea, Theodore C. Moore, Steven A Hovan

Publikováno v: Palaeogeography, Palaeoclimatology, Palaeoecology. 261:218-233

A 14-meter long pelagic clay core recovered at Marlin Rise (40°00.531′S, 154°2.601′W; 4775 m water depth) in the Southwest Pacific Basin contains a record of eolian dust deposited since the early Miocene. Downcore analysis of detrital minerals

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6019364d051475b856cde602997a6d4c
https://doi.org/10.1016/j.palaeo.2007.12.015

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Resolving eolian, volcanogenic, and authigenic components in pelagic sediment from the Pacific Ocean

Autor: David K. Rea, Richard W. Murray, Christa L Ziegler, Steven A Hovan

Publikováno v: Earth and Planetary Science Letters. 254:416-432

We measured major and trace element concentrations in the operationally defined, chemically extracted, residual aluminosilicate component of sediment from Ocean Drilling Program Sites 1215 and 1256 in the central and eastern equatorial Pacific Ocean

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fea439d6a6a9e83a6854da5f5cac2831
https://doi.org/10.1016/j.epsl.2006.11.049

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Twelve thousand years of dust : the Holocene global dust cycle constrained by natural archives

Publikováno v: Climate of the Past, Vol 11, Iss 6, Pp 869-903 (2015)
Copernicus Publications

Mineral dust plays an important role in the climate system by interacting with radiation, clouds, and biogeochemical cycles. In addition, natural archives show that the dust cycle experienced variability in the past in response to global and local cl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b49123aad90ca4802576ece5bcb4e80
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-258524

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Radiogenic isotopic mapping of late Cenozoic eolian and hemipelagic sediment distribution in the east-central Pacific

Autor: Joel D. Blum, David K. Rea, Steven A Hovan, Andrea M. Stancin, Robert M. Owen, Theodore C. Moore, James D. Gleason

Publikováno v: Earth and Planetary Science Letters. 248:840-850

Pelagic clay of the east-central Pacific province is shown to be a mixture of three primary detrital components, reflecting continental source areas in Asia, North America, and Central and South America. Relative contributions from each source area a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b3374795b16134394b72bafd6b6bd92c
https://doi.org/10.1016/j.epsl.2006.06.038

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Ichthyolith strontium isotope stratigraphy of a Neogene red clay sequence: calibrating eolian dust accumulation rates in the central North Pacific

Autor: Charles E Jones, Robert M. Owen, Joel D. Blum, David K. Rea, Tina M. Johnson, James D. Gleason, Steven A Hovan, Theodore C. Moore

Publikováno v: Earth and Planetary Science Letters. 202:625-636

Cenozoic pelagic (‘red’) clays of predominantly eolian and hydrogenous origin blanket much of the central North Pacific ocean basin. The eolian component is a key indicator of past paleoclimatic conditions; thus, Cenozoic atmospheric circulation

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c70b742971e10a177d91b0416a24a17b
https://doi.org/10.1016/s0012-821x(02)00827-0

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