Outputs (51)

High rates of rock organic carbon oxidation sustained as Andean sediment transits the Amazon foreland-floodplain (2023)
Journal Article
Dellinger, M., Hilton, R. G., Baronas, J. J., Torres, M. A., Burt, E. I., Clark, K. E., …West, A. J. (2023). High rates of rock organic carbon oxidation sustained as Andean sediment transits the Amazon foreland-floodplain. Proceedings of the National Academy of Sciences, 120(39), Article e2306343120. https://doi.org/10.1073/pnas.2306343120

The oxidation of organic carbon contained within sedimentary rocks (“petrogenic” carbon, or hereafter OCpetro) emits nearly as much CO2 as is released by volcanism, thereby playing a key role in the long-term global C budget. High erosion rates in mo... Read More about High rates of rock organic carbon oxidation sustained as Andean sediment transits the Amazon foreland-floodplain.

Hydrological control of river and seawater lithium isotopes (2022)
Journal Article
Zhang, F., Dellinger, M., Hilton, R. G., Yu, J., Allen, M. B., Densmore, A. L., …Jin, Z. (2022). Hydrological control of river and seawater lithium isotopes. Nature Communications, 13(1), Article 3359. https://doi.org/10.1038/s41467-022-31076-y

Seawater lithium isotopes (δ7Li) record changes over Earth history, including a ∼9‰ increase during the Cenozoic interpreted as reflecting either a change in continental silicate weathering rate or weathering feedback strength, associated with tecton... Read More about Hydrological control of river and seawater lithium isotopes.

Fractionation of rhenium isotopes in the Mackenzie River basin during oxidative weathering (2021)
Journal Article
Dellinger, M., Hilton, R. G., & Nowell, G. M. (2021). Fractionation of rhenium isotopes in the Mackenzie River basin during oxidative weathering. Earth and Planetary Science Letters, 573, Article 117131. https://doi.org/10.1016/j.epsl.2021.117131

Rhenium (Re) is a trace element whose redox chemistry makes it an ideal candidate to trace a range of geochemical processes. Here, we report the first rhenium isotopic measurements (Re) from river-borne materials to assess the influence of chemical w... Read More about Fractionation of rhenium isotopes in the Mackenzie River basin during oxidative weathering.

Pulsed carbon export from mountains by earthquake-triggered landslides explored in a reduced-complexity model (2021)
Journal Article
Croissant, T., Hilton, R. G., Li, G. K., Howarth, J., Wang, J., Harvey, E. L., …Densmore, A. L. (2021). Pulsed carbon export from mountains by earthquake-triggered landslides explored in a reduced-complexity model. Earth Surface Dynamics, 9(4), 823-844. https://doi.org/10.5194/esurf-9-823-2021

In mountain ranges, earthquakes can trigger widespread landsliding and mobilize large amounts of organic carbon by eroding soil and vegetation from hillslopes. Following a major earthquake, the landslide-mobilized organic carbon can be exported from... Read More about Pulsed carbon export from mountains by earthquake-triggered landslides explored in a reduced-complexity model.

Constraints on the source of reactive phases in sediment from a major Arctic river using neodymium isotopes (2021)
Journal Article
Larkin, C. S., Piotrowski, A. M., Hindshaw, R. S., Bayon, G., Hilton, R. G., Baronas, J. J., …Tipper, E. T. (2021). Constraints on the source of reactive phases in sediment from a major Arctic river using neodymium isotopes. Earth and Planetary Science Letters, 565, Article 116933. https://doi.org/10.1016/j.epsl.2021.116933

Riverine suspended particulate matter (SPM) is essential for the delivery of micronutrients such as iron (Fe) to the oceans. SPM is known to consist of multiple phases with differing reactivity, but their role in the delivery of elements to the ocean... Read More about Constraints on the source of reactive phases in sediment from a major Arctic river using neodymium isotopes.

Archaeological cereals as an isotope record of long-term soil health and anthropogenic amendment in southern Scandinavia (2021)
Journal Article
Gron, K., Larsson, M., Gröcke, D., Andersen, N., Andreasen, M., Bech, J., …Church, M. (2021). Archaeological cereals as an isotope record of long-term soil health and anthropogenic amendment in southern Scandinavia. Quaternary Science Reviews, 253, Article 106762. https://doi.org/10.1016/j.quascirev.2020.106762

Maintaining soil health is integral to agricultural production, and the archaeological record contains multiple lines of palaeoclimatic and palaeoenvironmental proxy evidence that can contribute to the understanding and analysis of long-term trajecto... Read More about Archaeological cereals as an isotope record of long-term soil health and anthropogenic amendment in southern Scandinavia.

An Abrupt Aging of Dissolved Organic Carbon in Large Arctic Rivers (2020)
Journal Article
Schwab, M., Hilton, R., Raymond, P., Haghipour, N., Amos, E., Tank, S., …Eglinton, T. (2020). An Abrupt Aging of Dissolved Organic Carbon in Large Arctic Rivers. Geophysical Research Letters, 47(23), Article e2020GL088823. https://doi.org/10.1029/2020gl088823

Permafrost thaw in Arctic watersheds threatens to mobilize hitherto sequestered carbon. We examine the radiocarbon activity (F14C) of dissolved organic carbon (DOC) in the northern Mackenzie River basin. From 2003‐2017, DOC‐F14C signatures (1.00 ± 0.... Read More about An Abrupt Aging of Dissolved Organic Carbon in Large Arctic Rivers.

Integrating suspended sediment flux in large alluvial river channels: Application of a synoptic Rouse‐based model to the Irrawaddy and Salween rivers (2020)
Journal Article
Baronas, J. J., Stevenson, E. I., Hackney, C. R., Darby, S. E., Bickle, M. J., Hilton, R. G., …Tipper, E. T. (2020). Integrating suspended sediment flux in large alluvial river channels: Application of a synoptic Rouse‐based model to the Irrawaddy and Salween rivers. Journal of Geophysical Research: Earth Surface, 125(9), https://doi.org/10.1029/2020jf005554

A large portion of freshwater and sediment is exported to the ocean by a small number 22 of major rivers. Many of these mega-rivers are subject to substantial anthropogenic pres23 sures, which are having a major impact on water and sediment delivery... Read More about Integrating suspended sediment flux in large alluvial river channels: Application of a synoptic Rouse‐based model to the Irrawaddy and Salween rivers.

Transformation of organic matter in a Barents Sea sediment profile: coupled geochemical and microbiological processes (2020)
Journal Article
Stevenson, M. A., Faust, J. C., Andrade, L. L., Freitas, F. S., Gray, N. D., Tait, K., …Abbott, G. D. (2020). Transformation of organic matter in a Barents Sea sediment profile: coupled geochemical and microbiological processes. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 378(2181), https://doi.org/10.1098/rsta.2020.0223

Process-based, mechanistic investigations of organic matter transformation and diagenesis directly beneath the sediment–water interface (SWI) in Arctic continental shelves are vital as these regions are at greatest risk of future change. This is in p... Read More about Transformation of organic matter in a Barents Sea sediment profile: coupled geochemical and microbiological processes.

Does Arctic warming reduce preservation of organic matter in Barents Sea sediments? (2020)
Journal Article
Faust, J. C., Stevenson, M. A., Abbott, G. D., Knies, J., Tessin, A., Mannion, I., …März, C. (2020). Does Arctic warming reduce preservation of organic matter in Barents Sea sediments?. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 378(2181), Article 20190364. https://doi.org/10.1098/rsta.2019.0364

Over the last few decades, the Barents Sea experienced substantial warming, an expansion of relatively warm Atlantic water and a reduction in sea ice cover. This environmental change forces the entire Barents Sea ecosystem to adapt and restructure an... Read More about Does Arctic warming reduce preservation of organic matter in Barents Sea sediments?.