Search Results - "Keigwin, L."

North Atlantic ocean circulation and abrupt climate change during the last glaciation by Henry, L. G., McManus, J. F., Curry, W. B., Roberts, N. L., Piotrowski, A. M., Keigwin, L. D.

“…The most recent ice age was characterized by rapid and hemispherically asynchronous climate oscillations, whose origin remains unresolved. Variations in…”
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Collapse and rapid resumption of Atlantic meridional circulation linked to deglacial climate changes by McManus, J. F, Francois, R, Gherardi, J.-M, Keigwin, L. D, Brown-Leger, S

“…The Atlantic meridional overturning circulation is widely believed to affect climate. Changes in ocean circulation have been inferred from records of the deep…”
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Deglacial floods in the Beaufort Sea preceded Younger Dryas cooling by Keigwin, L. D., Klotsko, S., Zhao, N., Reilly, B., Giosan, L., Driscoll, N. W.

“…A period of cooling about 13,000 years ago interrupted about 2,000 years of deglacial warming. Known as the Younger Dryas (YD), the event is thought to have…”
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Radiocarbon evidence for a possible abyssal front near 3.1 km in the glacial equatorial Pacific Ocean by Keigwin, L.D., Lehman, S.J.

“…We investigate the radiocarbon ventilation age in deep equatorial Pacific sediment cores using the difference in conventional 14C age between coexisting…”
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Tracing the Nd isotope evolution of North Atlantic Deep and Intermediate Waters in the western North Atlantic since the Last Glacial Maximum from Blake Ridge sediments by Gutjahr, M., Frank, M., Stirling, C.H., Keigwin, L.D., Halliday, A.N.

“…A high-resolution authigenic Nd isotope record has been extracted from the Fe–Mn oxyhydroxide fraction of drift sediments along the Blake Ridge in the North…”
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The Little Ice Age and Medieval Warm Period in the Sargasso Sea by Keigwin, Lloyd D.

“…Sea surface temperature (SST), salinity, and flux of terrigenous material oscillated on millennial time scales in the Pleistocene North Atlantic, but there are…”
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Origin of Abyssal NW Atlantic Water Masses Since the Last Glacial Maximum by Pöppelmeier, F., Gutjahr, M., Blaser, P., Keigwin, L. D., Lippold, J.

“…The notion of a shallow northern sourced intermediate water mass is a well evidenced feature of the Atlantic circulation scheme of the Last Glacial Maximum…”
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Bioturbation artifacts in zero-age sediments by Keigwin, L. D., Guilderson, T. P.

“…Most seafloor sediments are dated with radiocarbon, and the sediment is assumed to be zero‐age (modern) when the signal of atmospheric testing of nuclear…”
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Slope Water Current Over the Laurentian Fan on Interannual to Millennial Time Scales by Keigwin, L. D., Pickart, R. S.

“…The strength and position of surface and deep currents in the slope water south of Newfoundland are thought to vary as a coupled system in relation to the…”
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A 1600-year history of the Labrador Current off Nova Scotia by KEIGWIN, L. D, SACHS, J. P, ROSENTHAL, Y

“…A multicore from Emerald Basin, on the continental margin off Nova Scotia, has a modern ^sup 14^C age at the top, and other ^sup 14^C dates indicate a linear…”
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A 12,000-yr pollen record off Cape Hatteras — Pollen sources and mechanisms of pollen dispersion by Naughton, F., Keigwin, L., Peteet, D., Costas, S., Desprat, S., Oliveira, D., de Vernal, A., Voelker, A., Abrantes, F.

“…Integrating both marine and terrestrial signals from the same sediment core is one of the primary challenges for understanding the role of ocean–atmosphere…”
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Detecting Holocene Changes in Thermohaline Circulation by Keigwin, L. D., Boyle, E. A.

“…Throughout the last glacial cycle, reorganizations of deep ocean water masses were coincident with rapid millennial-scale changes in climate. Climate changes…”
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Late Pleistocene–Holocene oceanographic variability in the Okhotsk Sea: geochemical, lithological and paleontological evidence by Gorbarenko, S.A, Southon, J.R, Keigwin, L.D, Cherepanova, M.V, Gvozdeva, I.G

“…Sedimentary, geochemical and paleontological data, extracted from a sediment core taken from the central Okhotsk Sea, record climatic and sedimentary changes…”
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A biomarker approach for assessing marine and terrigenous inputs to the sediments of Sea of Okhotsk for the last 27,000 years by Ternois, Y, Kawamura, K, Keigwin, L, Ohkouchi, N, Nakatsuka, T

“…A sediment core taken from the Sea of Okhotsk, which is located in the western North Pacific rim with an extensive seasonal sea-ice cover, was investigated for…”
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The role of the deep ocean in North Atlantic climate change between 70 and 130 kyr ago by Keigwin, L. D, Curry, W. B, Lehman, S. J, Johnsen, S

“…Carbon and oxygen isotope analyses of benthic foraminifera in a high-resolution North Atlantic deep-sea sediment core for the period 70-130 kyr ago are…”
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Spatial and Temporal Offsets between Proxy Records in a Sediment Drift by Ohkouchi, Nao, Eglinton, Timothy I., Keigwin, Lloyd D., Hayes, John M.

“…Chronologies for Late Quaternary marine sediment records are usually based on radiocarbon ages of planktonic foraminifera. Signals carried by other sedimentary…”
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Sudden changes in North Atlantic circulation during the last deglaciation by Lehman, Scott J, Keigwin, Lloyd D

“…A study finds that sudden changes in the flow of warm Atlantic surface waters into the Norwegian Sea occurred frequently during the last deglaciation,…”
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Astronomical age models for Pleistocene drift sediments from the western North Atlantic (ODP Sites 1055–1063) by Grützner, J, Giosan, L, Franz, S.O, Tiedemann, R, Cortijo, E, Chaisson, W.P, Flood, R.D, Hagen, S, Keigwin, L.D, Poli, S, Rio, D, Williams, T

“…Ten ODP sites drilled in a depth transect (2164–4775 m water depth) during Leg 172 recovered high-deposition rate (>20 cm/kyr) sedimentary sections from…”
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Abrupt deglaciation events and Holocene palaeoceanography from high-resolution cores, Cartwright Saddle, Labrador Shelf, Canada by Andrews, J. T., Keigwin, L., Hall, F., Jennings, Anne E.

“…The uppermost Quaternary sediments in Cartwright Saddle, Labrador Shelf, are acoustically laminated, with reflectors that can be traced over long distances…”
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The 8200 year B.P. event in the slope water system, western subpolar North Atlantic by Keigwin, L. D., Sachs, J. P., Rosenthal, Y., Boyle, E. A.

“…Stable isotope, trace metal, alkenone paleothermometry, and radiocarbon methods have been applied to sediment cores in the western subpolar North Atlantic…”
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