Results 41 to 50 of about 25,230 (195)

Regional seawater δ18O records and global δ18O seawater-stack over the mid-Pleistocene transition

, 2019
High-resolution seawater δ18O records, derived from coupled benthic foraminifera Mg/Ca and δ18O analyses, can be used to evaluate how global ice volume changed during the Mid-Pleistocene Transition (MPT, ~1250-600 ka ago).
Ford, Heather L, Raymo, Maureen E
core   +1 more source

Cellulose Oxygen Isotopes of Sphagnum and Vascular Plants in a Peat Core Reveal Climate Change in Northern Japan Over the Past 2,000 Years

Geochemistry, Geophysics, Geosystems, 2021
The cellulose δ18O of plant tissues in peat is a potential climate proxy. However, understanding what is driving the shifts in δ18O of cellulose is required for its application.
Hiromichi Sakurai, Masanobu Yamamoto, Osamu Seki, Takayuki Omori, Tomonori Sato   +4 more
doaj   +1 more source

Late-glacial to late-Holocene shifts in global precipitation δ18O [PDF]

, 2015
Reconstructions of Quaternary climate are often based on the isotopic content of paleo-precipitation preserved in proxy records. While many paleo-precipitation isotope records are available, few studies have synthesized these dispersed records to explore
Galewsky, J., Jasechko, S., S. Jasechko, Risi, C., Sharp, ZD, Gleeson, T, Yoshimura, K., C. Risi, Welker, J. M., Werner, M., Yoshimura, K, Cendón, D.I., Z. D. Sharp, F. S. R. Pausata, D. I. Cendón, Sharp, Z.D., Cendón, D. I., M. Werner, Gleeson, T., LeGrande, AN, Fawcett, P.J., Cendon, DI, A. Lechler, K. Yoshimura, J. Galewsky, T. Gleeson, Fawcett, P. J., Lechler, A, Pausata, F. S. R., Galewsky, J, Sharp, Z. D., Pausata, F.S.R., Risi, C, P. J. Fawcett, Pausata, FSR, Welker, JM, Pausata, Francesco S. R.,, Fawcett, PJ, Welker, J.M., Gleeson, Tom, Werner, M, A. N. LeGrande, Jasechko, S, Werner, Martin, J. M. Welker, LeGrande, A. N., Lechler, A.   +46 more
core   +2 more sources

20th Century δ18O Seawater and Salinity Variations Reconstructed From Paired δ18O and Sr/Ca Measurements of a La Reunion Coral

, 2019
Sea surface salinity (SSS) is an important variable in the global ocean circulation. However, decadal to interdecadal changes in SSS are not well understood due to the lack of instrumental data.
Wolf‐Christian Dullo (8259327), D Garbe‐Schönberg (8259321), M Leupold (8259324), M Pfeiffer (7726595), L Reuning (7726601), J Zinke (7711073)   +5 more
core   +5 more sources

Late Pleistocene Volcanic Rocks From Tengchong Volcanic Field at SE Tibetan Plateau: Constraints on Petrogenesis and Mantle and Crustal Processes

Geological Journal, EarlyView.
Early zircon saturation and crystallisation occur in mafic (52–54 wt.% SiO2) lavas at Tengchong volcanic field. These early formed zircons with high δ18O (6.6‰–7.9‰) indicates mantle enrichment by subducted supracrustal materials. ABSTRACT Late Pleistocene (< 0.2 Ma) mafic and evolved volcanic rocks occur in northern Tengchong Volcanic Field, SE ...
Lizhu Wang, Haibo Zou
wiley   +1 more source

Seasonal variations and controlling factors of speleothem multi-proxy in southeastern China: Implications for the reconstruction of precipitation seasonality

Frontiers in Earth Science, 2023
Precipitation in southeastern China exhibits strong seasonal variability, which significantly impacts local agricultural production and social development. However, the reconstruction of precipitation seasonality has been limited by the lack of precisely
Yanyan Bao, Haiwei Zhang, Haiwei Zhang, Haiwei Zhang, Xiaowen Niu, Rui Zhang, Jing Lu, Binglin Meng, Jiayu Lu, Liangcheng Tan, Yanjun Cai, Yanjun Cai, Hai Cheng, Hai Cheng, Hai Cheng   +14 more
doaj   +1 more source

High-resolution late-glacial chronology for the Gerzensee lake record (Switzerland): δ18O correlation between a Gerzensee-stack and NGRIP [PDF]

, 2013
Oxygen-isotope variations were analyzed on bulk samples of shallow-water lake marl from Gerzensee, Switzerland, in order to evaluate major and minor climatic oscillations during the late-glacial.
Schwander, Jakob, van Raden, Ulrike J., Eicher, Ueli, Leuenberger, Markus, Colombaroli, Daniele, van Leeuwen, Jacqueline F. N., Gilli, Adrian, Bernasconi, Stefano M.   +7 more
core   +1 more source

Intra‐Plant Nitrogen Isotope Fractionation in Maize

Journal of Plant Nutrition and Soil Science, EarlyView.
ABSTRACT Background and aim The natural abundance of nitrogen isotopes (δ15N) provides a powerful integrative tracer of nitrogen uptake and assimilation in plants, yet the internal partitioning of δ15N among plant tissues remains insufficiently understood.
Priscillia Semaoune, Joëlle Templier, Sylvie Derenne, R. Dave Evans, Mathieu Sebilo   +4 more
wiley   +1 more source

Temporal and Spatial Variations of Precipitation δ18O and Controlling Factors on the Pearl River Basin and Adjacent Regions

Advances in Meteorology, 2018
Based on the precipitation  δ18O values from the datasets of the Global Network of Isotopes in Precipitation (GNIP), the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) Reanalysis data, and previous ...
Yunfeng Ruan, Zhaofei Liu, Zhijun Yao, Rui Wang   +3 more
doaj   +1 more source

Late Holocene environmental history of Dojran, Macedonia: Investigating the interplay of imperial dynamics and climatic change

Journal of Quaternary Science, EarlyView.
ABSTRACT This study presents a high‐resolution, multi‐proxy reconstruction of environmental and land‐use change from Lake Dojran over historical times (last 2500 years), combining pollen, biomarkers, radiocarbon dating, Ottoman taxation records and other historical data.
Alessia Masi, Lucrezia Masci, Georgios C. Liakopoulos, Monica Bini, Alexander Francke, Ilaria Isola, Carlo Ricotta, Laura Sadori, Alexander Sarantis, Sławomir Sprawski, Jakub Sypiański, Irene Tunno, Cristiano Vignola, Bernd Wagner, Giovanni Zanchetta, Adam Izdebski   +15 more
wiley   +1 more source