All Outputs (51)

High rates of rock organic carbon oxidation sustained as Andean sediment transits the Amazon foreland-floodplain (2023)
Journal Article

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

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

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

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

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

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

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

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.

Does Arctic warming reduce preservation of organic matter in Barents Sea sediments? (2020)
Journal Article

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?.

Transformation of organic matter in a Barents Sea sediment profile: coupled geochemical and microbiological processes (2020)
Journal Article

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.

Mountains, erosion and the carbon cycle (2020)
Journal Article

Mountain building results in high erosion rates and the interaction of rocks with the atmosphere, water and life. Carbon transfers that result from increased erosion could control the evolution of Earth’s long-term climate. For decades, attention has... Read More about Mountains, erosion and the carbon cycle.

Long-term patterns of hillslope erosion by earthquake-induced landslides shape mountain landscapes (2020)
Journal Article

Widespread triggering of landslides by large storms or earthquakes is a dominant mechanism of erosion in mountain landscapes. If landslides occur repeatedly in particular locations within a mountain range, then they will dominate the landscape evolut... Read More about Long-term patterns of hillslope erosion by earthquake-induced landslides shape mountain landscapes.

Efficient preservation of young terrestrial organic carbon in sandy turbidity current deposits (2020)
Journal Article

Burial of terrestrial biospheric particulate organic carbon in marine sediments removes CO2 from the atmosphere, regulating climate over geologic time scales. Rivers deliver terrestrial organic carbon to the sea, while turbidity currents transport ri... Read More about Efficient preservation of young terrestrial organic carbon in sandy turbidity current deposits.

Unravelling the controls on the molybdenum isotopic composition of rivers (2020)
Journal Article

Formation and crystallisation of the Lunar Magma Ocean (LMO) was one of the most incisive events during the early evolution of the Moon. Lunar Magma Ocean solidification concluded with the coeval formation of K-, REE- and P-rich components (KREEP) an... Read More about Unravelling the controls on the molybdenum isotopic composition of rivers.

Measurements of rhenium isotopic composition in low-abundance samples (2020)
Journal Article

Rhenium (Re) is a trace element whose redox chemistry makes it an ideal candidate to trace a range of geochemical processes. In particular, fractionation of its isotopes 187Re (62.6% abundance) and 185Re (37.4%) may be used to improve our understandi... Read More about Measurements of rhenium isotopic composition in low-abundance samples.

Preservation of organic carbon during active fluvial transport and particle abrasion (2019)
Journal Article

Oxidation of particulate organic carbon (POC) during fluvial transit releases CO2 to the atmosphere and can influence global climate. Field data show large POC oxidation fluxes in lowland rivers; however, it is unclear if POC losses occur predominant... Read More about Preservation of organic carbon during active fluvial transport and particle abrasion.

Carbon dioxide emissions by rock organic carbon oxidation and the net geochemical carbon budget of the Mackenzie River Basin (2019)
Journal Article

The exposure of organic carbon in rocks to oxidative weathering can release carbon dioxide (CO2) to the atmosphere and consume atmospheric oxygen. Alongside volcanism, metamorphism, and the weathering of carbonate minerals by sulfuric acid, this is a... Read More about Carbon dioxide emissions by rock organic carbon oxidation and the net geochemical carbon budget of the Mackenzie River Basin.

Monsoonal control on a delayed response of sedimentation to the 2008 Wenchuan earthquake (2019)
Journal Article

Infrequent extreme events such as large earthquakes pose hazards and have lasting impacts on landscapes and biogeochemical cycles. Sediments provide valuable records of past events, but unambiguously identifying event deposits is challenging because... Read More about Monsoonal control on a delayed response of sedimentation to the 2008 Wenchuan earthquake.

Seismic cycles, earthquakes, landslides and sediment fluxes: Linking tectonics to surface processes using a reduced-complexity model (2019)
Journal Article

In tectonically active mountain ranges, landslides triggered by earthquakes mobilise large volumes of sediment that affect river dynamics. This sediment delivery can cause downstream changes in river geometry and transport capacity that affect the ri... Read More about Seismic cycles, earthquakes, landslides and sediment fluxes: Linking tectonics to surface processes using a reduced-complexity model.

The isotopic composition and fluxes of particulate organic carbon exported from the eastern margin of the Tibetan Plateau (2019)
Journal Article

Erosion of organic carbon from the terrestrial biosphere and sedimentary rocks plays an important role in the global carbon cycle across a range of timescales. Over geological timescales (>104 years), erosion and burial of particulate organic carbon... Read More about The isotopic composition and fluxes of particulate organic carbon exported from the eastern margin of the Tibetan Plateau.