Results 31 to 40 of about 26,538 (206)

Stalagmite evidence for East Asian winter monsoon variability and 18O-depleted surface water in the Japan Sea during the last glacial period

Progress in Earth and Planetary Science, 2021
In the East Asian monsoon area, stalagmites generally record lower and higher oxygen isotope (δ18O) levels during warm humid interglacial and cold dry glacial periods, respectively.
Shota Amekawa, Kenji Kashiwagi, Masako Hori, Tomomi Sone, Hirokazu Kato, Tomoyo Okumura, Tsai-Luen Yu, Chuan-Chou Shen, Akihiro Kano   +8 more
doaj   +1 more source

Oxygen Isotope Equilibrium of the Shallow-Water Benthic Foraminifer Hanzawaia nipponica Asano in Tosa Bay, Southwest Japan

Frontiers in Earth Science, 2021
Oxygen isotopic compositions (δ18O) of benthic foraminifer tests are widely used for reconstructing paleoceanographic changes, such as global ice volumes during glacial–interglacial cycles.
Minoru Ikehara, Minoru Ikehara, Shigetaka Kita, Shungo Kawagata   +3 more
doaj   +1 more source

A novel salinity proxy based on Na incorporation into foraminiferal calcite [PDF]

, 2013
Salinity and temperature determine seawater density, and differences in both thereby control global thermohaline circulation. Whereas numerous proxies have been calibrated and applied to reconstruct temperature, a direct and independent proxy for ...
Reichart, G.J., Nooijer, L.J. de, Wit, Johannes C., Reichart, G.-J., Wit, JC, G. J. Reichart, de Nooijer, LJ, Wit, J.C., Reichart, GJ, L. J. de Nooijer, Wolthers, M., de Nooijer, Lennart, de Nooijer, L.J., Reichart, Gert-Jan, J. C. Wit, Wolthers, MVH, M. Wolthers   +16 more
core   +2 more sources

Isotopic composition (δ18O, δ2H) of the snow cover in Karelia [PDF]

, 2021
For the first time, a regional study of the isotopic composition (δ18O and δ2 H) of the snow cover in Karelia was performed using a sub-meridional and two sub-latitudinal profiles (March 2016).
M. A. Levichev, G. S. Borodulina, I. V. Tokarev   +2 more
core   +1 more source

Indication of evaporation effects by hydrogen and oxygen isotopes in the water bodies of the Tanglanghe River Basin, Yiyuan county, Shandong Province

Carsologica Sinica
This study takes the Tanglanghe River Basin in Yiyuan county, Shandong Province as the study area. To investigate the influence of evaporation on the regional water cycle, the stable isotopic compositions of groundwater and surface water samples ...
Xiaoyan ZHU, Zhuo ZHANG, Fen HUANG
doaj   +1 more source

Negligible local-factor influences on tree ring cellulose δ18O of Qilian juniper in the Animaqing Mountains of the eastern Tibetan Plateau

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, Xuemei Shao, Wenling An, Takeshi Nakatsuka, Yong Zhang, Masaki Sano, Zhengtang Guo   +6 more
doaj   +1 more source

Seasonal and Inter-Annual Variations of Stable Isotopic Characteristics of Rainfall and Cave Water in Shennong Cave, Southeast China, and Its Paleoclimatic Implication

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, Haiwei Zhang, Haiwei Zhang, Rui Zhang, Fan Zhang, Zeyuan Liang, Yanjun Cai, Yanjun Cai, Hai Cheng, Hai Cheng   +9 more
doaj   +1 more source

Climatologic and hydrologic influences on the oxygen isotope ratio of tree cellulose in coastal southern California during the late 20th century

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, Nikolaus Buenning, Lowell Stott, Dave Stahle   +3 more
doaj   +1 more source

Temperature-Dependent Oxygen Isotope Fractionation in Plant Cellulose Biosynthesis Revealed by a Global Dataset of Peat Mosses

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
doaj   +1 more source

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, Andreas Hartmann, Wuhui Duan, Stuart Hankin, Laia Comas-Bru, Mark O. Cuthbert, Pauline C. Treble, Jay Banner, Dominique Genty, Lisa M. Baldini, Miguel Bartolomé, Ana Moreno, Carlos Pérez-Mejías, Martin Werner   +13 more
doaj   +1 more source