Results 41 to 50 of about 1,000 (198)

Radon‐222 as an Effective Tracer to Distinguish Groundwater Circulation Patterns in the Deep Fault‐Controlled Geothermal System

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract Groundwater flow regulated by deep faults remains challenging to trace due to structural complexity. This study applies the noble gas tracer 222Rn combined with hydrochemistry and stable isotopes (δ2H, δ18O) to distinguish circulation patterns of geothermal springs along a major fault in the Tibetan Plateau.
Xiaoyan Shi, Xingxing Kuang, Meizhuang Zhu, Linfeng Fan, Xinkang Wang, Gexi Zheng, Yinlei Hao, Chunmiao Zheng   +7 more
wiley   +1 more source

Using Radon (222Rn) to Trace Variability in Greenhouse Gas Emission From Tree Stems Across Species, Seasons and Stem Heights

Ecohydrology, Volume 19, Issue 3, April/May 2026.
ABSTRACT Emissions from trees are an important component of the global methane (CH4) cycle, but their spatial origins (soil vs. in‐stem), transport pathways and environmental influences are not well constrained. To address these issues, this field study characterized spatial and temporal variability in stem emissions of biologically inert radon (222Rn),
Glory A. Iorliam, Kevan B. Moffett, Amr E. Keshta, J. Patrick Megonigal, Karen L. Knee   +4 more
wiley   +1 more source

Measurement of radon and thoron concentrations of soil- gas in Al-Kufa city using RAD-7 detector

Iraqi Journal of Physics, 2021
This work represents the set of measurements of radon and thoron concentrations levels of soil-gas in Al-Kufa city in Iraq using electric Radon meter (RAD-7). Radon and thoron concentration were measured in soil-gas in 20 location for three depth of (50,
Ali A. Al-Hamidawi
doaj  

Seasonal and Geologic Controls on Submarine Groundwater Discharge‐Derived Nutrient Fluxes to Two Coastal Embayments

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 4, April 2026.
Abstract Submarine groundwater discharge and porewater exchange are critical but often overlooked sources of nutrients to coastal systems. This study investigates how sediment permeability and summer‐winter seasonal dynamics influence the magnitude and biogeochemistry of nutrient fluxes from submarine groundwater discharge and porewater exchange ...
Moira Taylor, Joseph J. Tamborski, Aaron Alorda‐Kleinglass, Nathaniel Maynard   +3 more
wiley   +1 more source

Carbon Cycle Succession Across a Permafrost Thaw Gradient in Northeastern Alberta as Revealed by δ13C in Dissolved Solids, Gases, and Particulates in Lakes

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 2, February 2026.
Abstract δ13C in particulate organic carbon (POC), dissolved organic carbon (DOC), dissolved inorganic carbon (DIC), carbon dioxide (CO2(g)) and methane (CH4(g)), together with geochemical modeling, were applied to describe carbon cycle evolution in 40 boreal lakes situated across a permafrost thaw gradient in northeastern Alberta, Canada, where ...
J. J. Gibson, P. Eby, A. Jaggi
wiley   +1 more source

Geospatial examination of tap water pollution in residential areas of the Al-Abbasiya neighborhood, Najaf, Iraq [PDF]

E3S Web of Conferences
The present study measured radon (222Rn) levels in the drinking water obtained from thirty houses distributed within Al-Abbasiya District, Najaf City, Iraq to estimate public health risk and adherence to safety standards set by international ...
Ridha Raya Fadhil, Abbas Shurooq Lafta, Matar Lina Majeed, Yousif Saja Nafea, Alhiti Laith S.   +4 more
doaj   +1 more source

Tropicalization Enhances Mangrove Methane Emissions to the Atmosphere

Geophysical Research Letters, Volume 53, Issue 1, 16 January 2026.
Abstract Organic‐rich mangrove soils release CH4, partially offsetting the climate benefits of high organic carbon sequestration. However, the local and global drivers and variability of mangrove CH4 emissions remain poorly understood. Here, we quantify water‐atmosphere CH4 emissions over hourly, daily, and weekly time scales in an Australian mangrove ...
Xiaogang Chen, Isaac R. Santos, Tristan McKenzie, Faming Wang, Gloria M. S. Reithmaier, Luiz C. Cotovicz Jr, Ceylena Holloway, Yvonne Y. Y. Yau, Shengjie Hu, Ling Li   +9 more
wiley   +1 more source

Research on the method to measure the average radon exhalation rate of room inner surface

Nuclear Engineering and Technology
In high-rise buildings, radon from building materials is one of the main sources of indoor radon. People spend an average of 80 % of their time indoors every day.
Hongbo Xu, Fen Lin, Shuaibin Liu, Huiying Li, Zhongkai Fan, Ruomei Xie, Xinyue Yang, Xianfa Mao, Shicheng Luo, Chenxi Zu, Feng Xiao, Jia Liu, Yi Liu, Haoyu You, Hao You, Cheng Luo, Hongzhi Yuan, Yanliang Tan   +17 more
doaj   +1 more source

Radon Gas Risk Indices in Water on Fractured Basement of Ayetoro Housing Scheme, Oyo [PDF]

Physics Access
Radon gas, a naturally occurring radioactive element, presents significant health risks, particularly in areas with fractured basement geology, where subsurface characteristics can elevate its concentration.
Emmanuel A Oni, Johnson A Abilawon, Oluwaseun O Oloyede, Abraham A Aremu, Olukunle O Oladapo, Temitayo A Olajide, Mustapha K Lawal, Paul S Ayanlola, Olatunde M Oni   +8 more
doaj   +1 more source

Overlooked seasonal groundwater nutrient fluxes rival anthropogenic point sources across a variable land‐use tidal river

Limnology and Oceanography, Volume 70, Issue 12, Page 3815-3831, December 2025.
Abstract Understanding groundwater–surface water connectivity in tidal freshwater zones is essential for managing ecosystems within the riverine–estuarine continuum. Groundwater discharge is a key source of dissolved nutrient loads that can lead to eutrophication, deoxygenation, and other ecosystem imbalances in coastal environments.
James A. Padilla‐Montalvo, Douglas R. Tait, Michael J. Reading, Benjamin T. Stewart, Angus Ferguson, Iremar Fernandez‐Vazquez, James Z. Sippo, Shivanesh Rao, Mitch Call, Christopher Ralph, Josh Guyat, Jenny Rogers, Merran Griffith, Damien T. Maher   +13 more
wiley   +1 more source