Global patterns of nitrate isotope composition in rivers and adjacent aquifers reveal reactive nitrogen cascading
| Autor: | Fu-Jun Yue, Greg Michalski, Duc Anh Trinh, Widad Fadhullah, Lhoussaine Bouchaou, Prasanta Sanyal, Lucilena R. Monteiro, Wendell W. Walters, Pascal Boeckx, Nerantzis Kazakis, Viviana Re, Nina Welti, Elisa Sacchi, Asunción Romanelli, Sakhila Priyadarshanee, Diego S. Rivera, Alejandro Garcia-Moya, Nandana V. Edirisinghe, Carlos Alonso-Hernández, Daren C. Gooddy, Si-Liang Li, J. R. Fianko, Ioannis Matiatos, Leonard I. Wassenaar, Minh T. N. Luu, Christina Biasi, Jason J. Venkiteswaran, Fredrick Tamooh |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
DELTA-O-18 VALUES
WINNIPEG Biogeochemical cycle GROUNDWATER 010504 meteorology & atmospheric sciences Reactive nitrogen δ18O chemistry.chemical_element Aquifer 010501 environmental sciences 01 natural sciences chemistry.chemical_compound Nitrate WATER SOURCE IDENTIFICATION 0105 earth and related environmental sciences General Environmental Science geography geography.geographical_feature_category LAND-USE DENITRIFICATION δ15N LAKE Nitrogen Isotopes of nitrogen chemistry DISSOLVED-OXYGEN Earth and Environmental Sciences Environmental chemistry General Earth and Planetary Sciences Environmental science N-15 DELTA-N-15 |
| Zdroj: | COMMUNICATIONS EARTH & ENVIRONMENT |
| ISSN: | 2662-4435 |
| Popis: | Remediation of nitrate pollution of Earth’s rivers and aquifers is hampered by cumulative biogeochemical processes and nitrogen sources. Isotopes (δ15N, δ18O) help unravel spatiotemporal nitrogen(N)-cycling of aquatic nitrate (NO3−). We synthesized nitrate isotope data (n = ~5200) for global rivers and shallow aquifers for common patterns and processes. Rivers had lower median NO3− (0.3 ± 0.2 mg L−1, n = 2902) compared to aquifers (5.5 ± 5.1 mg L−1, n = 2291) and slightly lower δ15N values (+7.1 ± 3.8‰, n = 2902 vs +7.7 ± 4.5‰, n = 2291), but were indistinguishable in δ18O (+2.3 ± 6.2‰, n = 2790 vs +2.3 ± 5.4‰, n = 2235). The isotope composition of NO3− was correlated with water temperature revealing enhanced N-cascading in warmer climates. Seasonal analyses revealed higher δ15N and δ18O values in wintertime, suggesting waste-related N-source signals are better preserved in the cold seasons. Isotopic assays of nitrate biogeochemical transformations are key to understanding nitrate pollution and to inform beneficial agricultural and land management strategies. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|