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22 results on '"Dux, Florian"'

2. Partitioning of Mg, Sr, Ba and U into a subaqueous calcite speleothem

Author

Drysdale, Russell N., Zanchetta, Giovanni, Baneschi, Ilaria, Guidi, Massimo, Isola, Ilaria, Couchoud, Isabelle, Piccini, Leonardo, Greig, Alan, Wong, Henri, Woodhead, Jon D., Regattieri, Eleonora, Corrick, Ellen, Paul, Bence, Spötl, Christoph, Denson, Eleonor, Gordon, Jay, Jaillet, Stephane, Dux, Florian, and Hellstrom, John C.

Published
2019
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4. Colluvial slope agriculture in context: An extensive agricultural landscape along the slopes of Punalu'u Valley, O'ahu Island, Hawai'i.

Author

Morrison, Alex E., Quintus, Seth, Rieth, Timothy M., Filimoehala, Christopher, Duarte, Trever, Tulchin, Jon, Dosseto, Anthony, Anae, Hannah Kaumakamanōkalanipō, Filimoehala, Darby, Knecht, Dan, and Dux, Florian

Subjects
AGRICULTURE, RADIOACTIVE dating, FIFTEENTH century, LANDSCAPES, SEVENTEENTH century
Abstract

Archaeological research on traditional Hawaiian agriculture has generally focused on two primary strategies: irrigated pondfield and intensive dryland cultivation. However, other cultivation strategies, such as colluvial slope agriculture, were practiced but have been less intensively studied and remain poorly understood. To begin to remedy this paucity of information, a joint education and research project between International Archaeological Research Institute, Inc., the University of Hawai'i at Mānoa (UHM) Department of Anthropology, and Kamehameha Schools (KS) was conducted in Punalu'u Ahupua'a to examine an integrated slope agricultural, religious, and residential complex. Subsurface investigations and radiometric dating indicate that initial vegetation clearing of the area may have occurred as early as the late thirteenth to early fifteenth centuries AD. As early as the fifteenth century, some stands of economic trees were growing, which may have coincided with initial placement of boundary walls along some portions of the slopes. Major expansion of the surface agricultural infrastructure along the landscape occurred through the sixteenth and eighteenth centuries AD. Religious structures and associated features were built as early as the seventeenth century and later. These results situate colluvial slope agriculture within the broader context of traditional Hawaiian agronomic strategies and political and social processes across the Hawaiian archipelago. [ABSTRACT FROM AUTHOR]

Published
2024
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8. Developments in AusGeochem: A platform for geochemical data storage, dissemination, visualisation and analysis

Author

Dalton, Hayden, primary, Ware, Bryant, additional, Boone, Samuel, additional, Gréau, Yoann, additional, Ananuer, Halimulati, additional, Nixon, Angus, additional, Hodgekiss, Sally-Ann, additional, Kohlmann, Fabian, additional, Prent, Alexander, additional, Theile, Moritz, additional, Noble, Wayne, additional, Dux, Florian, additional, Koutamanis, Dafne, additional, Wang, Xueying, additional, Chen, Bei, additional, McMillan, Malcolm, additional, Stirling, Jack, additional, Zhou, Renjie, additional, Armistead, Sheree, additional, McInnes, Brent, additional, and Kohn, Barry, additional

Published
2023
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13. Can glendonites be used as palaeothermometers?

Author

Vickers, Madeleine L., primary, Bernasconi, Stefano M., additional, Schultz, Bo Pagh, additional, Rogov, Mikhail, additional, Ershova, Victoria, additional, Ullmann, Clemens V., additional, Chivas, Allan R., additional, Dux, Florian W., additional, and Jones, Morgan, additional

Published
2022
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14. Colluvial slope agriculture in context: An extensive agricultural landscape along the slopes of Punalu‘u Valley, O‘ahu Island, Hawai‘i

Author

Morrison, Alex E., primary, Quintus, Seth, additional, Rieth, Timothy M., additional, Filimoehala, Christopher, additional, Duarte, Trever, additional, Tulchin, Jon, additional, Dosseto, Anthony, additional, Anae, Hannah Kaumakamanōkalanipō, additional, Filimoehala, Darby, additional, Knecht, Dan, additional, and Dux, Florian, additional

Published
2022
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17. Paleotemperatures over multiple glacial-interglacial cycles from a subaqueous speleothem

Author

Drysdale, Russell N., Daëron, Mathieu, Pollard, Timothy, Dux, Florian, Peral, Marion, Blamart, Dominique, Greig, Alan, Woodhead, Jon, Zanchetta, Giovanni, Couchoud, Isabelle, Edwards, R. Lawrence, Hellstrom, John C., Isola, Ilaria, Regattieri, Eleonora, School of Geography, University of Melbourne, Environnements, Dynamiques et Territoires de la Montagne (EDYTEM), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), School of Earth Sciences [Melbourne], Faculty of Science [Melbourne], University of Melbourne-University of Melbourne, Dipartimiento di Scienze della Terra, University of Pisa - Università di Pisa, Department of Geology and Geophysics, University of Minnesota [Twin Cities] (UMN), University of Minnesota System-University of Minnesota System, Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Palermo, Environnements, Dynamiques et Territoires de Montagne (EDYTEM), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), and Couchoud, Isabelle

Subjects
[SDE] Environmental Sciences, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, Paleoclimate, [SDU.OCEAN] Sciences of the Universe [physics]/Ocean, Atmosphere, [SDE.MCG]Environmental Sciences/Global Changes, Glacial-interglacial cycles, Speleothem, [SDU.ENVI] Sciences of the Universe [physics]/Continental interfaces, environment, Cycles glaciaires-interglaciaires, [SDE.MCG] Environmental Sciences/Global Changes, [SDU.STU.CL] Sciences of the Universe [physics]/Earth Sciences/Climatology, Geochemistry, [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology, [SDE]Environmental Sciences, Paleotemperature, [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2019

18. Radiometrically dated speleothem records of Terminations IV and V and linkages to the North Atlantic

Author

pollard, timothy, Drysdale, Russell N., Woodhead, Jon, Edwards, R. Lawrence, Hellstrom, John C., Cheng, Hai, Dux, Florian, Daëron, Mathieu, Li, Xianglei, Wong, Henry, Couchoud, Isabelle, Regattieri, Eleonora, Zanchetta, Giovanni, Isola, Ilaria, Environnements, Dynamiques et Territoires de la Montagne (EDYTEM), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), School of Geography, University of Melbourne, School of Earth Sciences [Melbourne], Faculty of Science [Melbourne], University of Melbourne-University of Melbourne, Department of Geology and Geophysics, University of Minnesota [Twin Cities] (UMN), University of Minnesota System-University of Minnesota System, Institute of Global Environmental Change [China] (IGEC), Xi'an Jiaotong University (Xjtu), Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Australian Nuclear Science and Technology Organisation [Australie] (ANSTO), Dipartimiento di Scienze della Terra, University of Pisa - Università di Pisa, Istituto Nazionale di Geofisica e Vulcanologia – Sezione di Pisa (INGV), Istituto Nazionale di Geofisica e Vulcanologia, Environnements, Dynamiques et Territoires de Montagne (EDYTEM), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), and Couchoud, Isabelle

Subjects
[SDE] Environmental Sciences, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, [SDE.MCG] Environmental Sciences/Global Changes, [SDU.STU.CL] Sciences of the Universe [physics]/Earth Sciences/Climatology, [SDU.OCEAN] Sciences of the Universe [physics]/Ocean, Atmosphere, [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology, [SDE.MCG]Environmental Sciences/Global Changes, [SDE]Environmental Sciences, [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment, [SDU.ENVI] Sciences of the Universe [physics]/Continental interfaces, environment, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2019

19. Partitioning of Mg, Sr, Ba and U into a subaqueous speleothem

Author

Drysdale, Russell N., Zanchetta, Giovanni, Baneschi, Illaria, Guidi, Massimo, Isola, Ilaria, Couchoud, Isabelle, Piccinini, Leonardo, Greig, Alan, Wong, Henry, Woodhead, Jon, Regattieri, Eleonora, Corrick, Ellen, Bence, Paul, Spötl, Christoph, Denson, Eleanor, Gordon, Jay, Jaillet, Stéphane, Dux, Florian, Hellstrom, John C., School of Geography [Melbourne], Faculty of Science [Melbourne], University of Melbourne-University of Melbourne, Dipartimiento di Scienze della Terra, University of Pisa - Università di Pisa, CNR Istituto di Geoscienze e Georisorse [Pisa] (IGG-CNR), Consiglio Nazionale delle Ricerche (CNR), Istituto Nazionale di Geofisica e Vulcanologia – Sezione di Pisa (INGV), Istituto Nazionale di Geofisica e Vulcanologia, Environnements, Dynamiques et Territoires de la Montagne (EDYTEM), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), Universita degli Studi di Padova, School of Earth Sciences [Melbourne], Australian Nuclear Science and Technology Organisation [Australie] (ANSTO), Department of Geology and Palaeontology, and University of Innsbruck

Subjects
[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry, [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology, [SDE.MCG]Environmental Sciences/Global Changes, [SDE]Environmental Sciences, trace elements, [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment, speleothem, geochemistry
Abstract

International audience; The trace-element geochemistry of speleothems is becoming increasingly used for reconstructing palaeoclimate, with a particularemphasis on elements whose concentrations vary according to hydrological conditions at the cave site (e.g. Mg, Sr, Baand U). An important step in interpreting trace-element abundances is understanding the underlying processes of their incorporation.This includes quantifying the fractionation between the solution and speleothem carbonate via partition coefficients(where the partitioning (D) of element X (DX) is the molar ratio [X/Ca] in the calcite divided by the molar ratio [X/Ca] in theparent water) and evaluating the degree of spatial variability across time-constant speleothem layers. Previous studies of howthese elements are incorporated into speleothems have focused primarily on stalagmites and their source waters in naturalcave settings, or have used synthetic solutions under cave-analogue laboratory conditions to produce similar dripstones. However,dripstones are not the only speleothem types capable of yielding useful palaeoclimate information. In this study, weinvestigate the incorporation of Mg, Sr, Ba and U into a subaqueous calcite speleothem (CD3) growing in a natural cave poolin Italy. Pool-water measurements extending back 15 years reveal a remarkably stable geochemical environment owing to thedeep cave setting, enabling the calculation of precise solution [X/Ca]. We determine the trace element variability of ‘modern’subaqueous calcite from a drill core taken through CD3 to derive DMg, DSr, DBa and DU then compare these with publishedcave, cave-analogue and seawater-analogue studies. The DMg for CD3 is anomalously high (0.042 ± 0.002) compared to previousestimates at similar temperatures (~8 °C). The DSr (0.100 ± 0.007) is similar to previously reported values, but datafrom this study as well as those from Tremaine and Froelich (2013) and Day and Henderson (2013) suggest that [Na/Sr] mightplay an important role in Sr incorporation through the potential for Na to outcompete Sr for calcite non-lattice sites. DBa inCD3 (0.086 ± 0.008) is similar to values derived by Day and Henderson (2013) under cave-analogue conditions, whilst DU (0.013 ± 0.002) is almost an order of magnitude lower, possibly due to the unusually slow speleothem growth rates(

Published
2019

22. InterCarb: A Community Effort to Improve Interlaboratory Standardization of the Carbonate Clumped Isotope Thermometer Using Carbonate Standards

Author

Bernasconi, Stefano M., Daëron, Mathieu, Bergmann, Kristin, Bonifacie, Magali, Meckler, Anna N., Affek, Hagit P., Anderson, Noah, Bajnai, David, Barkan, Eugeni S., Beverly, Emily J., Blamart, Dominique, Burgener, Landon K., Calmels, Damien, Chaduteau, Carine, Clog, Matthieu, Davidheiser-Kroll, Brett, Davies, Amelia J., Dux, Florian W., Eiler, John M., Elliott, Ben M., Fetrow, Anne C., Fiebig, Jens, Goldberg, Samuel L., Hermoso, Michaël, Huntington, Katharine W., Hyland, Ethan G., Ingalls, Miquela, Jaggi, Madalina, John, Cédric M., Jost, Adam B., Katz, S., Kelson, Julia R., Kluge, Tobias M., Kocken, Ilja J., Laskar, Amzad H., Leutert, Thomas J., Liang, D., Lucarelli, Jamie, Mackey, Tyler J., Mangenot, Xavier, Meinicke, Niklas, Modestou, Sevasti, Müller, Inigo A., Murray, Sean T., Neary, A., Packard, N., Passey, Benjamin H., Pelletier, Elise M., Petersen, Sierra V., Piasecki, Alison, Schauer, Andrew J., Snell, Kathryn E., Swart, Peter K., Tripati, Aradhna K., Upadhyay, Deepshikha, Walter Vennemann, Torsten, Winkelstern, Ian Z., Yarian, Drake A., Yoshida, Naohiro, Zhang, Naizhong, and Ziegler, Martin

Subjects
carbonate, 13. Climate action, clumped isotopes, interlaboratory calibration, reference materials, mass spectrometry
Abstract

Increased use and improved methodology of carbonate clumped isotope thermometry has greatly enhanced our ability to interrogate a suite of Earth-system processes. However, interlaboratory discrepancies in quantifying carbonate clumped isotope (Δ47) measurements persist, and their specific sources remain unclear. To address interlaboratory differences, we first provide consensus values from the clumped isotope community for four carbonate standards relative to heated and equilibrated gases with 1,819 individual analyses from 10 laboratories. Then we analyzed the four carbonate standards along with three additional standards, spanning a broad range of δ47 and Δ47 values, for a total of 5,329 analyses on 25 individual mass spectrometers from 22 different laboratories. Treating three of the materials as known standards and the other four as unknowns, we find that the use of carbonate reference materials is a robust method for standardization that yields interlaboratory discrepancies entirely consistent with intralaboratory analytical uncertainties. Carbonate reference materials, along with measurement and data processing practices described herein, provide the carbonate clumped isotope community with a robust approach to achieve interlaboratory agreement as we continue to use and improve this powerful geochemical tool. We propose that carbonate clumped isotope data normalized to the carbonate reference materials described in this publication should be reported as Δ47 (I-CDES) values for Intercarb-Carbon Dioxide Equilibrium Scale., Geochemistry, Geophysics, Geosystems, 22 (5), ISSN:1525-2027

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