Search Results - "Elderfield, H"

Evolution of Ocean Temperature and Ice Volume Through the Mid-Pleistocene Climate Transition by Elderfield, H., Ferretti, P., Greaves, M., Crowhurst, S., McCave, I. N., Hodell, D., Piotrowski, A. M.

“…Earth's climate underwent a fundamental change between 1250 and 700 thousand years ago, the mid-Pleistocene transition (MPT), when the dominant periodicity of…”
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Calibrations for benthic foraminiferal Mg/Ca paleothermometry and the carbonate ion hypothesis by Elderfield, H., Yu, J., Anand, P., Kiefer, T., Nyland, B.

“…Benthic foraminiferal magnesium/calcium ratios were determined on one hundred and forty core-top samples from the Atlantic Ocean, the Norwegian Sea, the Indian…”
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The magnesium isotope budget of the modern ocean: Constraints from riverine magnesium isotope ratios by Tipper, E.T., Galy, A., Gaillardet, J., Bickle, M.J., Elderfield, H., Carder, E.A.

“…We have measured the magnesium (Mg) isotope ratios in 45 rivers including 16 of the largest rivers in the world, covering a range of geologic, tectonic and…”
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Cenozoic Deep-Sea Temperatures and Global Ice Volumes from Mg/Ca in Benthic Foraminiferal Calcite by Lear, C. H., Elderfield, H., Wilson, P. A.

“…A deep-sea temperature record for the past 50 million years has been produced from the magnesium/calcium ratio (Mg/Ca) in benthic foraminiferal calcite. The…”
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Constraints on soluble aerosol iron flux to the Southern Ocean at the Last Glacial Maximum by Conway, T.M., Wolff, E.W., Röthlisberger, R., Mulvaney, R., Elderfield, H.E.

“…Relief of iron (Fe) limitation in the Southern Ocean during ice ages, with potentially increased carbon storage in the ocean, has been invoked as one driver of…”
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MID-OCEAN RIDGE HYDROTHERMAL FLUXES AND THE CHEMICAL COMPOSITION OF THE OCEAN by Elderfield, H, Schultz, A

“…Geophysical estimates of mid-ocean ridge axial heat fluxes (2-4 × 10 12 W) and of the total hydrothermal flux (9 ± 2 × 10 12 W) are well established. Problems…”
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Warm climates of the past-a lesson for the future? by Lunt, D. J., Elderfield, H., Pancost, R., Ridgwell, A., Foster, G. L., Haywood, A., Kiehl, J., Sagoo, N., Shields, C., Stone, E. J., Valdes, P.

“…This Discussion Meeting Issue of the Philosophical Transactions A had its genesis in a Discussion Meeting of the Royal Society which took place on 10-11…”
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North Atlantic climate and deep-ocean flow speed changes during the last 230 years by Boessenkool, K. P., Hall, I. R., Elderfield, H., Yashayaev, I.

“…Variations in the near‐bottom flow speed of Iceland‐Scotland Overflow Water (ISOW) are documented in a 230‐year‐long deep‐sea sediment record from the eastern…”
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A Cenozoic seawater Sr/Ca record from benthic foraminiferal calcite and its application in determining global weathering fluxes by Lear, C.H., Elderfield, H., Wilson, P.A.

“…A Cenozoic multi-species record of benthic foraminiferal calcite Sr/Ca has been produced and is corrected for inter-specific offsets (typically less than 0.3…”
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Oceanic Cd/P ratio and nutrient utilization in the glacial Southern Ocean by Elderfield, H, Rickaby, R. E. M

“…During glacial periods, low atmospheric carbon dioxide concentration has been associated with increased oceanic carbon uptake, particularly in the southern…”
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A synthesis of marine sediment core δ13C data over the last 150 000 years by R. E. M. Rickaby, N. R. Edwards, G. M. Henderson, S. Crowhurst, B. A. A. Hoogakker, K. I. C. Oliver, H. Elderfield

“…The isotopic composition of carbon, δ13C, in seawater is used in reconstructions of ocean circulation, marine productivity, air-sea gas exchange, and biosphere…”
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High resolution evidence for linkages between NW European ice sheet instability and Atlantic Meridional Overturning Circulation by Peck, V.L., Hall, I.R., Zahn, R., Elderfield, H., Grousset, F., Hemming, S.R., Scourse, J.D.

“…Published studies show that ice rafted debris (IRD) deposition preceding Heinrich (H) events H1 and H2 in the NE Atlantic was derived from the NW European ice…”
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Evidence for elevated alkalinity in the glacial Southern Ocean by Rickaby, R. E. M., Elderfield, H., Roberts, N., Hillenbrand, C.-D., Mackensen, A.

“…An increase in whole ocean alkalinity during glacial periods could account, in part, for the drawdown of atmospheric CO2 into the ocean. Such an increase was…”
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Multi-proxy reconstruction of surface water pCO2 in the northern Arabian Sea since 29ka by Palmer, M.R., Brummer, G.J., Cooper, M.J., Elderfield, H., Greaves, M.J., Reichart, G.J., Schouten, S., Yu, J.M.

“…We report here the results of a multi-proxy study to reconstruct surface water pCO2 concentrations in the northern Arabian Sea. Our results show that δ11B and…”
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Fluid and geochemical transport through oceanic crust: a transect across the eastern flank of the Juan de Fuca Ridge by Elderfield, H., Wheat, C.G., Mottl, M.J., Monnin, C., Spiro, B.

“…The geochemical implications of thermally driven flow of seawater through oceanic crust on the mid-ocean ridge flank have been examined on a well-studied 80 km…”
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Island weathering: river sources of rare earth elements to the Western Pacific Ocean by Sholkovitz, E.R, Elderfield, H, Szymczak, R, Casey, K

“…This paper focuses on two of the largest rivers and estuaries of Papua New Guinea (PNG), the Fly and Sepik and explores the degree to which river input and…”
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The future of the carbon cycle: review, calcification response, ballast and feedback on atmospheric CO2 by Barker, S., Higgins, J.A., Elderfield, H.

“… We then use a box model to demonstrate how the calcification response may affect the organic carbon rain rate through the ballast effect. The ballast effect…”
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Gulf Stream – subtropical gyre properties across two Dansgaard–Oeschger cycles by Hoogakker, B.A.A., Downy, F., Andersson, M.A., Chapman, M.R., Elderfield, H., McCave, I.N., Lenton, T.M., Grützner, J.

“…Salinity increase in the subtropical gyre system may have pre-conditioned the North Atlantic Ocean for a rapid return to stronger overturning circulation and…”
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A biomineralization model for the incorporation of trace elements into foraminiferal calcium carbonate by Elderfield, H., Bertram, C.J., Erez, J.

“…Measurements of Sr Ca of benthic foraminifera show a linear decrease with water depth which is superimposed upon significant variability identified by analyses…”
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Aeolian sources of rare earth elements to the Western Pacific Ocean by Greaves, M.J, Elderfield, H, Sholkovitz, E.R

“…Rare earth element (REE) determinations have been made on 25 surface seawater samples on a longitudinal transect from Asia to North America within a…”
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