Results 11 to 20 of about 26,538 (206)

Advancing annually resolved oxygen isotope dendrochronology to overcome wood-dating limitations in the Euro-Atlantic region. [PDF]

open access: yesPLoS ONE
Stable oxygen isotope dendrochronology has emerged as a ground-breaking technique for dating historic timbers when conventional tree-ring-width dendrochronology falls short.
Clara Rodríguez-Morata   +7 more
doaj   +2 more sources

Stable Isotope Analysis (δ<sup>13</sup>C, δ<sup>15</sup>N and δ<sup>18</sup>O) of Killer Whale Dentine: Evaluating Treatment Methods and Establishing Best Practices. [PDF]

open access: yesRapid Commun Mass Spectrom
ABSTRACT 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

Fish without water: Validation and application of δ18O in Totoaba macdonaldi otoliths

open access: yesCiencias Marinas, 2008
The geochemistry of fish otoliths is a valuable tool for reconstructing environmental conditions, migrations and life histories. In this study we validate the relationship between temperature, the water oxygen isotope composition (δ18O) and otolith δ18O
K Rowell, C True, KW Flessa, DL Dettman
doaj   +2 more sources

Effects of Pretreatment on the Isotopic Composition of Structural Carbonate in Ray‐Finned Fish Teeth [PDF]

open access: yesRapid Commun Mass Spectrom
ABSTRACT Rationale The carbon and oxygen stable isotope ratios (δ13C and δ18O) of carbonate contained in fish tooth dentin have the potential to offer insights into environmental and ecological conditions, making them promising targets for analysis in fossil specimens.
Furuya T   +3 more
europepmc   +2 more sources

Tree-ring δ18O from an Alpine catchment reveals changes in glacier stream water inputs between 1980 and 2010 [PDF]

open access: yesArctic, Antarctic, and Alpine Research, 2019
The tree-ring stable carbon and oxygen isotope chronologies from two forest sites located in the Forni Glacier forefield (Italy)—one along the glacier stream (GL) and the other toward the valley slope (SL)—were analyzed with the aim of disentangling the ...
Giovanni Leonelli   +9 more
doaj   +4 more sources

Deer Antler δ<sup>18</sup>O Records Desalination in Israel's Water Supply. [PDF]

open access: yesRapid Commun Mass Spectrom
ABSTRACT Rationale Stable oxygen isotope ratios (δ¹⁸O) in mammalian tissues are widely used to reconstruct past climates, seasonal patterns, and animal origins. These analyses assume that animals drink local rainwater—an assumption now challenged by large‐scale anthropogenic water management.
Laposki C, Darcy A, Werner N, Hartman G.
europepmc   +2 more sources

An isotope mass balance model for the correlation of freshwater bivalve shell (Unio pictorum) carbonate δ18O to climatic conditions and water δ18O in Lake Balaton (Hungary)

open access: yesJournal of Limnology, 2011
The oxygen isotope composition of bivalve shells (δ18Oshell) can potentially record environmental variability of shallow lakes and therefore it has been extensively used as a proxy in the reconstruction of past climate and environmental conditions.
Gabriella SCHÖLL-BARNA
doaj   +2 more sources

Constraining Holocene hydrological changes in the Carpathian–Balkan region using speleothem δ18O and pollen-based temperature reconstructions [PDF]

open access: yes, 2014
Here we present a speleothem isotope record (POM2) from Ascunsă Cave (Romania) that provides new data on past climate changes in the Carpathian–Balkan region from 8.2 ka until the present.
Dragusin, Virgil   +5 more
core   +3 more sources

The origin of high δ18O zircons: marbles, megacrysts, and metamorphism [PDF]

open access: yes, 2011
The oxygen isotope ratios (δ18O) of most igneous zircons range from 5 to 8‰, with 99% of published values from 1345 rocks below 10‰. Metamorphic zircons from quartzite, metapelite, metabasite, and eclogite record δ18O values from 5 to 17‰, with 99% below
J. Valley (23314189)   +5 more
core   +2 more sources

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