Triple oxygen isotope compositions of globally distributed soil carbonates record widespread evaporation of soil waters

Geochimica et Cosmochimica Acta, Journal Year: 2023, Volume and Issue: 355, P. 138 - 160

Published: July 3, 2023

Language: Английский

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¹⁷O‐Excess in Tropical Cyclones Reflects Local Rain Re‐Evaporation More Than Moisture Source Conditions

Journal of Geophysical Research Atmospheres, Journal Year: 2024, Volume and Issue: 129(6)

Published: March 16, 2024

Abstract 17 O‐excess is a relatively new water isotope parameter that could potentially provide useful information about the hydrological cycle. Previous works focusing on in polar regions suggest it primarily tracks moisture source relative humidity, but little known how to interpret data lower latitudes. Here we present quasi‐hourly triple oxygen of precipitation collected from two tropical cyclones Texas and Louisiana 2020 understand impacts environmental meteorological processes low‐to mid‐latitude precipitation. We find at both hourly timescales event scale, strongly correlated changes on‐site rainfall intensity which consistent with theory isotopic fractionation associated rain re‐evaporation lowers remaining droplet. In addition, although evaporative conditions region may also influence vapor transported site, their are likely overprinted by post‐condensation processes. Our results thus can be used as proxy for local rather than during cyclones.

Language: Английский

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Global and local meteoric water lines for δ17O/δ18O and the spatiotemporal distribution of Δ′17O in Earth’s precipitation

Scientific Reports, Journal Year: 2023, Volume and Issue: 13(1)

Published: Nov. 4, 2023

Recently, δ17O and its excess (Δ'17O) have become increasingly significant "triple-oxygen-isotope" indicators of distinctive hydrological processes in hydrology climatology. This situation mirrors the research regarding δ18O δ2H 1960s towards a solid theoretical base surge application examples field studies worldwide. Currently, systematic global measurements for precipitation are still lacking. As result, attempts been made to define Global δ17O/δ18O Meteoric Water Line (GMWL), often by using regional or local datasets varying systematicity. Different definitions reference slope (λref) determining Δ'17O values proposed, ongoing debate around proposed consensus value 0.528. study used worldwide samples archived IAEA Network Isotopes Precipitation (GNIP) (a) derive GMWL based on four-year monthly records from 66 GNIP stations, (b) formulate meteoric water lines (LMWL) these stations' areas, (c) evaluate seasonal variations precipitation. The was determined be δ'17O = 0.5280 ± 0.0002 δ'18O + 0.0153 0.0013, keeping with value. Furthermore, our results suggested that line-conditioned 17O-excess is viable alternative over λref context paleoclimatology interpretations; however, without challenging as such.

Language: Английский

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Nitrate isotopes in catchment hydrology: Insights, ideas and implications for models

Journal of Hydrology, Journal Year: 2023, Volume and Issue: 626, P. 130326 - 130326

Published: Oct. 20, 2023

Language: Английский

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A 3.5–year rainfall isotope records from northwestern Madagascar featuring 17Oexcess and implication for paleoclimate research.

Applied Geochemistry, Journal Year: 2025, Volume and Issue: unknown, P. 106335 - 106335

Published: Feb. 1, 2025

Language: Английский

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Groundwater Modeling from Urban Areas (NW Portugal): an Integrated Hydrological-Hydrogeological Approach

Earth Systems and Environment, Journal Year: 2025, Volume and Issue: unknown

Published: March 28, 2025

Language: Английский

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Artificial regulation affects nitrate sources and transformations in cascade reservoirs by altering hydrological conditions

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 381, P. 125225 - 125225

Published: April 7, 2025

Language: Английский

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Why does the Water in a Natural Pool from Transparent Turn into Pumpkin Soup Color?

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: April 29, 2025

Lakes, reservoirs, and ponds are crucial inland water bodies that provide essential resources deliver significant ecological, social, cultural services. As a key indicator of quality, identifying the causes color changes is paramount importance. The periodic reddish-brown "pumpkin soup" phenomenon observed in Clean Pool (CP) Heilong (HP) southwestern China has raised concerns about quality ecosystem health. We used analytical approaches including, nutrient elements, heavy metal concentrations, dissolved substances, algal community composition, δD-δ¹⁸O isotope models to investigate ecological geochemical mechanisms underlying this phenomenon. results indicate that, despite Bacillariophyta dominating HP, they not deciding factor changes. Instead, Fe(OH)₃ colloidal particles, which originate from groundwater-surface interactions influenced by redox environment fluctuations, identified as causing discoloration. Hydrological analysis reveals atmospheric precipitation groundwater dynamics significantly affect formation transport particles. distinct physical biological characteristics Clear Turbid Pools further accentuate landscape contrast between two column. This study challenges conventional assumption blooms sole cause anomalies, emphasizing critical role hydrogeochemical processes karst landscapes. Simultaneously, findings new insights into evolution regulation special habitats regions offer theoretical framework for managing similar bodies. Additionally, underscores importance integrating hydrological, geochemical, perspectives address complex environmental phenomena extreme terrain condition.

Language: Английский

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Groundwater chemistry and isotope for interpreting the hydrogeological conditions and hydrochemical evolution of multilayer aquifer system of Donghai island, China

Applied Geochemistry, Journal Year: 2023, Volume and Issue: 159, P. 105833 - 105833

Published: Nov. 7, 2023

Language: Английский

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Variations in triple oxygen isotope of speleothems from the Asian monsoon region reveal moisture sources over the past 300 years

Communications Earth & Environment, Journal Year: 2023, Volume and Issue: 4(1)

Published: Oct. 18, 2023

Abstract Characterization of moisture origins is crucial to understanding hydroclimatic processes. Nevertheless, documenting past atmospheric contents and their sources remains challenging partially due insufficient moisture-tracing proxies. Here, we present triple oxygen isotope compositions in 21 cave speleothems from monsoonal Asia examine spatial origin differences eastern over the 300 years. Our data suggest an isotopic equilibrium fractionation during speleothem formation, thus parent water 17 O anomalies (Δ′ O) values reconstructed preserve information on recycling across space. Notably, Δ′ records exhibit a distinct geographical distribution, with low central-eastern southern China, high northwestern northern relatively Yangtze River region. This pattern underscores diverse influence different regulated by regional hydrological circulation, demonstrates potential use reconstructing cycle at scales.

Language: Английский

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