Academic Journal
Controls on the stable Mo isotopic composition of inner-continental precipitation
| العنوان: | Controls on the stable Mo isotopic composition of inner-continental precipitation |
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| المؤلفون: | O'Sullivan, E. M., Kaufmann, A. K. C., Rosca, C., Babechuk, M. G., Pierret, M. C., Waber, N. H., Nägler, T. F. |
| المساهمون: | Institut Terre Environnement Strasbourg (ITES), École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | Atmospheric Environment ; https://insu.hal.science/insu-04763868 ; Atmospheric Environment, 2024, 338, ⟨10.1016/j.atmosenv.2024.120838⟩ |
| بيانات النشر: | HAL CCSD |
| سنة النشر: | 2024 |
| المجموعة: | Institut national des sciences de l'Univers: HAL-INSU |
| مصطلحات موضوعية: | Molybdenum isotopes, Atmosphere, Aerosols, Precipitation, Mass balance, Airborne, Sea salt, Anthropogenic, Mineral dust, [SDU]Sciences of the Universe [physics] |
| الوصف: | International audience ; The molybdenum (Mo) isotope budget of the surface environment has been well characterized in recent decades, facilitating accurate mass balance modeling of the ancient redox-driven Mo cycle. One yet unresolved component is the range of possible processes and sources that result in isotopically heavy river waters relative to continental sources. Following a recent hypothesis that isotopically heavy δ 98 Mo of precipitation may control the final δ 98 Mo of river water relative to its continental source bedrock, we investigated the δ 98 Mo composition of 19 snow samples from three locations in Central Europe: the Swiss Alps ("Alpine" samples) from the Hochalpine Forschungsstation Jungfraujoch (HFSJ) in both summer and winter, the Swiss Jura Mountains in winter and the French Vosges Mountains in winter. Stream waters from two snowmelt-fed streams were additionally collected from the Alpine site. Snow sample δ 98 Mo compositions were highly variable, ranging from ‑0.03 to +1.93 ‰, with no clear mixing trends indicating complex sources, source pathways, or post-depositional processing. Only the winter snow samples from the high-altitude HFSJ site had δ 98 Mo values consistently heavier than typical continental crust. The δ 98 Mo results were coupled with radiogenic Sr isotopic, major ion, and trace element compositions as tracers for three major sources of airborne ion inputs: sea salt, mineral dust, and anthropogenic aerosols. We found that the most likely source of Mo to precipitation in the lower elevation Vosges and Jura Mountains samples was isotopically light soil mineral dust, which reflected the underlying bedrock sources, with a likely additional anthropogenic component. The isotopically heavy winter snow samples at the elevated HFSJ site were attributed to a higher input of carbonate mineral dust from long-distance transport of carbonate-rich Saharan dust, which was overwritten in the summer by an influx of low elevation sources transported upwards during higher vertical thermal ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | BIBCODE: 2024AtmEn.33820838O |
| DOI: | 10.1016/j.atmosenv.2024.120838 |
| الاتاحة: | https://insu.hal.science/insu-04763868 https://doi.org/10.1016/j.atmosenv.2024.120838 |
| رقم الانضمام: | edsbas.3047D1A4 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1016/j.atmosenv.2024.120838 |
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