Results 101 to 110 of about 1,519 (181)

Relationship between the chemical and isotopic composition of natural waters and the newest tectonic structure in the area of Lake Glubokoe (Moscow region)

Известия Томского политехнического университета: Инжиниринг георесурсов
Relevance. The tectonic factor affects the hydrogeological conditions. To assess the tectonics impact on hydrogeological conditions, it is necessary to use an integrated approach. The article considers the hydrogeochemical features of groundwater formed
Svetlana A. Glukhova, Natalia A. Kharitonova, Alexander V. Ermakov   +2 more
doaj   +1 more source

Triple oxygen isotope compositions reveal transitions in the moisture source of West China Autumn Precipitation

Communications Earth & Environment
The isotopic composition has long been used to investigate the factors influencing precipitation, whereas the variations of event-based precipitation isotopes caused by moisture transition and synoptic meteorological conditions remain limited.
Lijuan Sha, Lijun Tian, Lifen Sha, Yunxia Li, Xuejie Wang, Peng Hu, Qisheng Liang, Baoyun Zong, Pengzhen Duan, Hai Cheng   +9 more
doaj   +1 more source

Source Tracing of Sulfate in a Karst Groundwater System in Tai’an City, Shandong Province

Yankuang ceshi
In recent years, the concentration of sulfate in groundwater in northern karst areas has increased significantly, which not only poses a potential threat to human health, but also affects the safety of industrial and agricultural water and the ...
Xiaobo LI, Mingyi LI, Xueming ZHANG, Xiaoqian MA, Dawei SUN, Qinglu MENG, Chuanming MA   +6 more
doaj   +1 more source

88th Annual Meeting of the Meteoritical Society 2026: Abstracts

Meteoritics &Planetary Science, Volume 61, Issue S1, Page S48-S551, August 2026.
wiley   +1 more source

Organic petrography, biomarkers, and stable isotope (δ13C, δD, δ15N, δ18O) compositions of liptinite-rich coals

Liptinite-rich coals were evaluated using organic petrography, biomarkers, and stable isotopes to investigate their origin and paleoenvironmental significance, particularly, to explore fractionation characteristics of stable isotopes (δ13C, δD, δ15N, and
Stojanović, Ksenija A., Hower, J.C., Liu, B., Zhao, C., Bechtel, A., Guo, X., Stojanović, K.   +6 more
core   +1 more source

Revealing the Drivers of Unexpected High Nitrogen Levels in Tropical Rainforest Rivers in Winter

Ecosystem Health and Sustainability
Elevated river nitrogen (N) concentrations have contributed to eutrophication and subsequent ecological damage worldwide. However, current research has mostly focused on nitrate (NO3−) in rivers, with relatively few studies on the sources of different N ...
Tingtian Wu, Xiaoyan Pan, Yuanling Li, Zongzhu Chen, Xiaohua Chen, Jinrui Lei, Dezhi Wang, Wenshi Zhang, Hao Jiang   +8 more
doaj   +1 more source

Seasonal changes in dD, d18O, and d13C of tree ring cellulose in diffuse-porous Fagus crenata and ring-porous Quercus crispula trees

Hydrogen isotope ratios (δD) of tree-ring cellulose carry metabolic signals that are distinct from those recorded by carbon (δ13C) and oxygen (δ18O) isotope ratios.
Masaki Sano, Ryo Funada, Tsutom Hiura, Akira Kagawa, Eri Nabeshima, Zhen Li, Takeshi Nakatsuka   +6 more
core   +1 more source

δ18O and δD variations in some volcanic lakes on the Cameroon Volcanic Line (West-Africa): generating isotopic baseline data for volcano monitoring and surveillance in Cameroon

, 2014
Based on geo-anthropological and geochemical studies, catastrophes similar to the unprecedented gas explosions in the mid-1980s from the Cameroonian killer lakes Nyos and Monoun, might occur in any of the 37 other lakes located along the Cameroon ...
Wilson Y. Fantong, Dmitri Rouwet, Takeshi Ohba, Boris Chako Tchamabé, Minoru Kusakabe, Yutaka Yoshida, Nkamdjou Sigha, Alfred G. Mouliom, Festus Aka Tongwa, . Issa, Daniel Sighomnou   +10 more
core   +1 more source

Depth-Dependent isotope dynamics in karst reservoirs: Multi-Decadal monitoring insights from French caves

International audienceUnderstanding the stable oxygen isotope (δ18O/δD) compositions in rainwater and cave drip water within karst systems is essential for past climatic reconstructions all over the world.
Zhang, Jian, Devaux, Ludovic, Bujan, Stéphane, Li, Ting-Yong, Minster, Bénédicte, Régnier, Edouard, Genty, Dominique, Bourges, François   +7 more
core   +1 more source

Stable isotopic composition in snowpack along the traverse from a coastal location to Dome A (East Antarctica): Results from observations and numerical modeling

Stable isotopic composition (δ18O and δD) in Antarctic snow/ice cores serves as the proxy of past temperature. However, the accuracy of temperature reconstruction is largely dependent on the relationship between water isotopes and local temperature (δ-T)
Li, Li, Ma, Tianming, Li, Yuansheng, Jiang, Su, Ma, Hongmei, An, Chunlei, Yu, Jinhai, Shi, Guitao   +7 more
core   +1 more source