Results 31 to 40 of about 25,230 (195)
Frontiers in Earth Science, 2021 Speleothem calcite stable oxygen isotope (δ18OC) is one of the most widely used proxies in paleoclimate research, and understanding its seasonal-annual variability is very significant for palaeoclimate reconstruction.
Ye Tian +9 more
doaj +1 more source
Tellus: Series B, Chemical and Physical Meteorology, 2017 Tree ring cellulose oxygen isotopes (δ18O) were measured on 21 trees of Qilian juniper from the Animaqing Mountains, Tibetan Plateau, to investigate intra- and inter-tree variability, potential juvenile and elevation effects and climatic implications ...
Chenxi Xu +6 more
doaj +1 more source
Stable Isotope Analysis (δ13C, δ15N and δ18O) of Killer Whale Dentine: Evaluating Treatment Methods and Establishing Best Practices [PDF]
Rapid Commun Mass SpectromABSTRACT Rationale Stable isotope measurements in odontocete teeth can be used to reconstruct lifetime ecology, but some pre‐treatments may introduce bias. Isolating dentine collagen with HCl decalcification, removing the organic matrix or drying dentine prior to the analysis of structural carbonates can introduce unintended variability, limiting ...
Terrapon M +6 more
europepmc +2 more sources
Data for: From diatom opal-A δ18O to chert δ18O in deep sea sediments
, 2020 δ18O of silica ...
Anastasia Yanchilina (8620806)
core +2 more sources
Stable isotope (δ18O,δ13C) results of speleothems from Angelica Cave (central Brazil)
, 2021 Here we present a speleothem oxygen isotope (δ18O) and carbon isotope (δ13C) record from Angelica Cave in central Brazil (13.40°S, 46.23°W, ~585 m above sea level). The record is based on three stalagmite samples, AG1, AG2 and AG4.
Wong, Minn Lin +4 more
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Geochemistry, Geophysics, Geosystems, 2013 The oxygen isotope ratio (δ18O) of precipitation in continental, midlatitude regions is a complex measure of atmospheric dynamics and regional climate variability and can be preserved in geologic archives.
Lisa Kanner +3 more
doaj +1 more source
Frontiers in Earth Science, 2020 The oxygen isotope composition (δ18O) of plant cellulose has been widely used to study ecohydrological processes of ecosystems as well as to reconstruct past climate conditions in terrestrial climate archives.
Zhengyu Xia, Zicheng Yu, Zicheng Yu
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Yankuang ceshi, 2023 BACKGROUNDIt is of great significance to study the breeding environment of the naked carp in Qinghai Lake for the conservation and restoration of natural habitat. The naked carp is the only economic species in Qinghai Lake, colloquially called “Huang Yu”,
Ling ZHOU +6 more
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Global analysis reveals climatic controls on the oxygen isotope composition of cave drip water
Nature Communications, 2019 δ18O of speleothems are a widely used paleoclimate proxy. Here, the authors conduct a global analysis of cave drip water δ18O compositions and find that drip waters from warmer climates have a seasonal bias toward precipitation δ18O of recharge periods ...
Andy Baker +13 more
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Frontiers in Earth Science, 2022 The reconstruction of Asian summer monsoon (ASM) changes during the last glacial period is of great significance for better understanding monsoon dynamics. The phase relationship between the Indian summer monsoon (ISM) and East Asian summer monsoon (EASM)
Qingmin Chen +20 more
doaj +1 more source