Search Results - "Bradtmiller, Louisa I."

Pleistocene drivers of Northwest African hydroclimate and vegetation by O’Mara, Nicholas A., Skonieczny, Charlotte, McGee, David, Winckler, Gisela, Bory, Aloys J.-M., Bradtmiller, Louisa I., Malaizé, Bruno, Polissar, Pratigya J.

“…Savanna ecosystems were the landscapes for human evolution and are vital to modern Sub-Saharan African food security, yet the fundamental drivers of climate…”
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Changes in biological productivity along the northwest African margin over the past 20,000years by Bradtmiller, Louisa I, McGee, David, Awalt, Mitchell, Evers, Joseph, Yerxa, Haley, Kinsley, Christopher W, deMenocal, Peter B

“…The intertropical convergence zone and the African monsoon system are highly sensitive to climate forcing at orbital and millennial timescales. Both systems…”
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Water Column Stratification in the Antarctic Zone of the Southern Ocean During the Mid‐Pleistocene Climate Transition by Billups, Katharina, York, Kelsee, Bradtmiller, Louisa I.

“…We use biogenic silica (opal) mass accumulating rates (MARs) at Ocean Drilling Program Site 745B to infer upwelling, and by extension upper water column…”
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Constraining Plio‐Pleistocene Shifts in Northwest African Hydroclimate, Ecosystem Distributions, and Marine Productivity: New Paleo‐Records Across the Mid‐Pleistocene Transition by O’Mara, Nicholas A., Skonieczny, Charlotte, McGee, David, Winckler, Gisela, Bory, Aloys J.‐M., Bradtmiller, Louisa I., Malaizé, Bruno, Polissar, Pratigya J.

“…Northwest Africa transitioned from a wet/vegetated landscape toward drier/sparser conditions sometime between the late‐Pliocene and the late‐Pleistocene…”
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Orbital‐ and Millennial‐Scale Variability in Northwest African Dust Emissions Over the Past 67,000 years by Kinsley, Christopher W., Bradtmiller, Louisa I., McGee, David, Galgay, Michael, Stuut, Jan‐Berend, Tjallingii, Rik, Winckler, Gisela, deMenocal, Peter B.

“…Reconstructions of aeolian dust flux to West African margin sediments can be used to explore changing atmospheric circulation and hydroclimate over North…”
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Comparing glacial and Holocene opal fluxes in the Pacific sector of the Southern Ocean by Bradtmiller, Louisa I., Anderson, Robert F., Fleisher, Martin Q., Burckle, Lloyd H.

“…The silicic acid leakage hypothesis (SALH) predicts that during glacial periods excess silicic acid was transported from the Southern Ocean to lower latitudes,…”
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Improvements to 232-thorium, 230-thorium, and 231-protactinium analysis in seawater arising from GEOTRACES intercalibration by Auro, Maureen E., Robinson, Laura F., Burke, Andrea, Bradtmiller, Louisa I., Fleisher, Martin Q., Anderson, Robert F.

“…The GEOTRACES program requires the analysis of large numbers of seawater samples for 232Th, 230Th, and 231Pa. During the GEOTRACES international…”
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Application of an inverse method to interpret 231Pa/230Th observations from marine sediments by Burke, Andrea, Marchal, Olivier, Bradtmiller, Louisa I., McManus, Jerry F., François, Roger

“…Records of 231Pa/230Th from Atlantic sediments have been interpreted to reflect changes in ocean circulation during the geologic past. Such interpretations…”
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231Pa/230Th evidence for a weakened but persistent Atlantic meridional overturning circulation during Heinrich Stadial 1 by Bradtmiller, Louisa I., McManus, Jerry F., Robinson, Laura F.

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231Pa/230Th evidence for a weakened but persistent Atlantic meridional overturning circulation during Heinrich Stadial 1 by Bradtmiller, Louisa I., McManus, Jerry F., Robinson, Laura F.

“…The strength of Atlantic meridional overturning circulation is believed to affect the climate over glacial-interglacial and millennial timescales. The marine…”
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Modeling the particle flux effect on distribution of 230Th in the equatorial Pacific by Siddall, Mark, Anderson, Robert F., Winckler, Gisela, Henderson, Gideon M., Bradtmiller, Louisa I., McGee, David, Franzese, Allison, Stocker, Thomas F., Müller, Simon A.

“…The normalization of sediment accumulation rates by 230Th is increasingly used to constrain particle rain rates because 230Th is produced at a known rate in…”
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Testing the silicic acid leakage hypothesis: Records of opal burial from the equatorial Atlantic, equatorial Pacific and Southern Oceans over the past 30ka by Bradtmiller, Louisa I

“…The Silicic Acid Leakage Hypothesis (SALH) suggests that during the Last Glacial Maximum (LGM) unused silicic acid escaped the Southern Ocean through…”
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Neodymium isotopes and concentrations in aragonitic scleractinian cold-water coral skeletons - Modern calibration and evaluation of palaeo-applications by Struve, Torben, van de Flierdt, Tina, Burke, Andrea, Robinson, Laura F., Hammond, Samantha J., Crocket, Kirsty C., Bradtmiller, Louisa I., Auro, Maureen E., Mohamed, Kais J., White, Nicholas J.

“…Cold-water corals (CWCs) are unique archives of mid-depth ocean chemistry and have been used successfully to reconstruct the neodymium (Nd) isotopic…”
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The Neodymium Isotope Fingerprint of Adélie Coast Bottom Water by Lambelet, M., Flierdt, T., Butler, E. C. V., Bowie, A. R., Rintoul, S. R., Watson, R. J., Remenyi, T., Lannuzel, D., Warner, M., Robinson, L. F., Bostock, H. C., Bradtmiller, L. I.

“…Adélie Land Bottom Water (ALBW), a variety of Antarctic Bottom Water formed off the Adélie Land coast of East Antarctica, ventilates the abyssal layers of the…”
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Improvements to 232-thorium, 230-thorium, and 231 by Auro, Maureen E, Robinson, Laura F, Burke, Andrea, Bradtmiller, Louisa I, Fleisher, Martin Q, F.Anderson, Robert

“…The GEOTRACES program requires the analysis of large numbers of seawater samples for super(232Th,) super( )230Th, and super(231Pa. During the GEOTRACES…”
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Changes in biological productivity along the northwest African margin over the past 20,000 years by Bradtmiller, Louisa I., McGee, David, Awalt, Mitchell, Evers, Joseph, Yerxa, Haley, Kinsley, Christopher W., deMenocal, Peter B.

“…The intertropical convergence zone and the African monsoon system are highly sensitive to climate forcing at orbital and millennial timescales. Both systems…”
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Organic carbon and carbonate fluxes: Links to climate change by Loubere, Paul, Siedlecki, Samantha A., Bradtmiller, Louisa I.

“…This volume is a compendium of articles derived from a Chapman conference entitled “The Role of Marine Organic Carbon and Carbonate Fluxes in Driving Global…”
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Changes in biological productivity along the northwest African margin over the past 20,000 years: AFRICAN MARGIN PALEOPRODUCTIVITY by Bradtmiller, Louisa I., McGee, David, Awalt, Mitchell, Evers, Joseph, Yerxa, Haley, Kinsley, Christopher W., deMenocal, Peter B.

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Diatom productivity in the equatorial Pacific Ocean from the last glacial period to the present: A test of the silicic acid leakage hypothesis by Bradtmiller, L. I., Anderson, R. F., Fleisher, M. Q., Burckle, L. H.

“…The silicic acid leakage hypothesis (SALH) suggests that during glacial periods, unused silicic acid escaped the Southern Ocean into the equatorial oceans,…”
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Testing the silicic acid leakage hypothesis: Records of opal burial from the equatorial Atlantic, equatorial Pacific and Southern Oceans over the past 30ka by Bradtmiller, Louisa I

“…The Silicic Acid Leakage Hypothesis (SALH) suggests that during the Last Glacial Maximum (LGM) unused silicic acid escaped the Southern Ocean through…”
Get full text