Results 131 to 140 of about 26,538 (206)

Ice core δ18O evidence for climatic transition since 1990s on East Rongbuk Glacier

npj Climate and Atmospheric Science
Ice core stable water isotope (δ18O) records serve as reliable proxies for temperature on long timescales in both polar and tropical high-elevation regions.
Jiajia Wang, Leigang Yin, Baiqing Xu
doaj   +1 more source

Epilimnion water temperature and calculated equilibrium δ18O in Mondsee, Austria, 2011-2013

, 2019
Epilimnion water temperature and calculated equilibrium δ18O in Mondsee, Austria, 2011 ...
Lauterbach, Stefan, Meyer, Hanno, Lucas Kämpf (8010983), Bernhard Chapligin (6967133), Nantke, Carla, Hanno Meyer (6963368), Birgit Plessen (7883495), Brauer, Achim, Kämpf, Lucas, Stefan Lauterbach (6964736), Plessen, Birgit, Chapligin, Bernhard, Carla Nantke (8024084), Achim Brauer (6960317)   +13 more
core   +1 more source

Isotopic composition of precipitation in Ljubljana (Slovenia)

Geologija, 2008
The stable isotopic composition of hydrogen and oxygen (δ2H and δ18O) and tritium activity (3H) are monitored in monthly precipitation at Ljubljana since 1981.
Polona Vreča, Ines Krajcar Bronič, Albrecht Leis, Mihael Brenčič   +3 more
doaj  

The Merging of the MODIS EVI and δ18O in Precipitation

, 2013
穩定同位素在水體中的自然變化可被視作時間空間上的指紋痕跡，並可用來回溯空間及時間上的源頭，目前已廣泛用於各種領域如水文學、古氣候學、生態學以及法醫學中。雖然科學家已投入許多精力於發展水中氧同位素的預測模型，但要達到高空間、高時間解析度及高準確性的氧同位素預測模型仍是一大挑戰。於本研究中，發展了一套創新的方法來預測降水中的氧同位素，不論在全球尺度或是在區域尺度下，均能使用強化型植生指數(EVI，Enhanced Vegetation Index)做出準確的氧同位素預測，本研究使用結構方程模組(SEM ...
詹偉平, Chan, Wei-Ping
core  

δ13C and δ18O Isotopic Analysis of a Platygonus compressus Tusk

, 2016
Stable-isotope analysis of Platygonus compressus remains from Peccary Cave, AR documents previously unknown dietary and seasonal information on flat-headed peccary. P. compressus diet knowledge currently derives from dental wear analyses with no isotopic
Wilson, Kurt
core  

Calcium Isotopic Composition in Reindeer (Rangifer tarandus) Bones and Tooth Enamel: A Scalable Tool to Quantify Nursing Frequency in Past and Modern Populations?

Rapid Communications in Mass Spectrometry, Volume 40, Issue 23, 15 December 2026.
ABSTRACT Rationale Populations of North American caribou and Eurasian reindeer (Rangifer tarandus sspp.), essential for Arctic ecosystems and human communities, are experiencing unprecedented declines due to climate change and anthropogenic pressures. While understanding their historical resilience and demographic dynamics is critical for conservation,
Auguste Hassler, Eve E. Lindroos, Lu Yang, Zoltan Mester, Kate Britton, Clément P. Bataille   +5 more
wiley   +1 more source

Exploratory Measurements of Singly Substituted and Clumped Isotopologues in Iodate Using Electrospray Ionization Mass Spectrometry

Rapid Communications in Mass Spectrometry, Volume 40, Issue 22, 30 November 2026.
ABSTRACT Rationale Clumped isotope geochemistry can reveal the temperatures and chemical pathways at which molecules form, but it remains unexplored for most inorganic systems. Iodate (IO3−) is central to ocean and atmospheric iodine cycling and to tracking radioactive iodine from nuclear activity.
Jamie Lucarelli, Amanda R. Bubas, Richard M Cox, Sophie B. Lehmann, Aradhna Tripati, Mark Engelmann, Elise R. Conte   +6 more
wiley   +1 more source

Leveraging Multi‐Isotope Systems to Investigate Conflict, Food Insecurity, and Elevated Nitrogen Isotope Values in the Nazca Highlands of Peru During the Late Intermediate Period (1000–1450 CE)

American Journal of Biological Anthropology, Volume 191, Issue 3, November 2026.
ABSTRACT Objectives The physical effects of interpersonal violence are well documented in archaeology, but its broader impacts on population health, mobility, and resource access remain less understood. This article assesses how chronic warfare restricted movement and access to critical resources, altering dietary practices and contributing to ...
Sarah J. Noe, Bridgette Degnan, Emily C. Kracht, Weston C. McCool   +3 more
wiley   +1 more source

Shifting Dietary Ecologies of Early Ungulates Across the Paleocene–Eocene Thermal Maximum in the Bighorn Basin, Wyoming

Ecology and Evolution, Volume 16, Issue 11, November 2026.
Understanding the interplay between climate change and ecology is crucial when attempting to reconstruct the evolutionary history of species. Here we use dental microwear texture analysis to infer the foraging ecologies of three lineages of early ungulates across the Paleocene–Eocene Thermal Maximum. We recovered differences in foraging guilds and only
Andrew Schwartz, Larisa R. G. DeSantis, Rob S. Scott   +2 more
wiley   +1 more source

Contrasting associations of sea‐ice meltwater and meteoric water with nitrogen uptake patterns in the summer Cosmonaut Sea, Antarctica

Limnology and Oceanography Letters, Volume 11, Issue 6, November 2026.
Abstract Nitrogen uptake by phytoplankton influences Southern Ocean productivity and carbon export, but how source‐resolved meltwater is associated with nitrate and ammonium use remains unclear. Here, 15N tracer incubations and a δ18O‐salinity mixing model were combined to examine nitrogen uptake in the early‐summer Cosmonaut Sea.
Kun Zhang, Qianyao Ma, Jun Zhao, Qiang Hao, Shunan Cao, Zifei Yang, Zhen Tang, Minfang Zheng, Mengya Chen, Jianfeng He, Min Chen   +10 more
wiley   +1 more source