Results 61 to 70 of about 4,709 (174)
Paleoceanography and Paleoclimatology, Volume 41, Issue 3, March 2026.Abstract Little is known about long‐term variability in the organic carbon to carbonate carbon export rain ratio, despite its key role in the global carbon cycle. Here, we reconstruct glacial‐interglacial changes in the sedimentary rain ratio over the Southern Ocean, using micropaleontological (coccoliths and foraminifera) and geochemical (CaCO3, Total
Yu Wang +16 more
wiley +1 more source
Journal of Groundwater Science and Engineering, 2022 Guanzhong Basin is a typical medium-low temperature geothermal field mainly controlled by geo-pressure in the west of China. The characteristics of hydrogen and oxygen isotopes were used to analyze the flow and storage modes of geothermal resources in ...
Feng Ma +3 more
doaj +1 more source
Land Use Influence on the Characteristics of Groundwater Inputs to the Great Bay Estuary, New Hampshire [PDF]
, 2004 This research examines the sources and factors affecting nutrient-laden groundwater discharge to the Great Bay Estuary. To further understand this relationship, examination of groundwater residence time, a review of historic land uses, and nitrate source
Bacca-Cortes, Gabriel F. +2 more
core +2 more sources
Northeast Siberian ice wedges confirm Arctic winter warming over the past two millennia [PDF]
, 2017 Arctic climate has experienced major changes over the past millennia that are not fully understood in terms of their controls and seasonality. Stable-data from ice wedges in permafrost provide unique information on past winter climate.
Dereviagin, Alexander Yu +4 more
core +1 more source
Journal of Geophysical Research: Atmospheres, Volume 131, Issue 4, 28 February 2026.Abstract Nitrogen stable isotopes (δ15N) of ice core nitrate (NO3−) are often subject to diverse interpretations associated with changes in nitrogen oxide (NOx) sourcing, atmospheric reactions, and/or post‐depositional processes. Here, an ice core from Mont Blanc (French Alps) was analyzed to investigate the δ15N(NO3−) record over the past 1,000 years.
Alexis Lamothe +11 more
wiley +1 more source
Geoscience Letters, 2022 The linear relationship between two stable water isotopes (δD and δ18O) has been used to examine the physical processes and movements or changes of three water phases (water vapor, liquid water and ice), including deuterium excess.
Jeonghoon Lee +3 more
doaj +1 more source
Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.Abstract During compound heatwave and drought events (CHDE), a significant amount of soil moisture is released into the atmosphere through evapotranspiration. In this study, we used multi‐source atmospheric water vapor isotope data sets, including satellite and ground‐based observations, to investigate the role of evapotranspired water vapor (EWV ...
Tao Xu +8 more
wiley +1 more source
Assessment of hydrogeochemical status of groundwater in a coastal region of Southeast coast of India
Applied Water Science, 2018 A study was conducted in a coastal region of Cuddalore district of Tamil Nadu, India, to identify the hydrogeochemical processes controlling the groundwater chemistry.
S. Chidambaram +7 more
doaj +1 more source
North American transect of stable hydrogen and oxygen isotopes in water beetles from a museum collection [PDF]
, 2018 Museum collections contain a wealth of insect remains originating from a wide geographic range, which can be used to investigate their utility as a proxy for environmental isotope ratios.
Elias, Scott +3 more
core
Hydrologic and isotopic modeling of Alpine Lake Waiau, Mauna Kea, Hawai'i [PDF]
, 2005 Analysis of hydrologic, meteorologic, and isotopic data collected over 3 yr quantifies and explains the enormous variability and isotopic enrichment (δ18O = +16.9, δD = +50.0) of alpine Lake Waiau, a culturally and ecologically significant perched lake ...
Arvidson, Raymond E. +9 more
core +3 more sources