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Stable isotope (carbon, hydrogen) variation in plants and lake surface sediments from northwestern Canada
(2021)EGUsphereHydrogen isotope ratios of leaf waxes are used to reconstruct past hydroclimate because they are correlated to meteoric/growth water hydrogen isotopes. The interpretation of these signatures from ancient sedimentary archives relies on a thorough understanding of the drivers of modern isotope variability. Studies in the high latitudes, regions that are particularly valuable in light of their vulnerability to rapid climate change, are scarce. ...Other Conference Item -
Mobilization of particulate organic matter and minerals in Zackenberg valley, Greenland
(2021)EGUsphereOngoing warming of the Northern high latitudes has intensified abrupt thaw processes throughout the permafrost zone. The resulting terrain disturbances are prone to release large amounts of particulate organic matter (OM) from deeper permafrost soils with thus far poorly constrained decay kinetics. Organo-mineral interactions may inhibit OM decomposition, thereby mediating the release of carbon to the atmosphere. Yet how these interactions ...Other Conference Item -
Degradation of permafrost carbon in the Kolyma River
(2020)EGUsphereSoil temperatures in permafrost (i.e. perennially frozen ground) are rising globally. The increasing temperatures accelerate permafrost thaw and release of organic carbon, that has been locked in permafrost soils since the last glacial period, to the contemporary carbon cycle. The potential remineralisation of organic carbon to greenhouse gases can contribute to further climate warming. Particulate organic carbon (POC) in the Kolyma River ...Other Conference Item -
Molecular evidence for pervasive riverine export of soil organic matter from the Central Himalaya
(2020)EGUsphereSoil erosion in high mountain ranges plays an important role in redistributing soil organic carbon across landscapes and may influence the global climate on different timescales [1, 2]. Here, we investigate the dynamics of soil organic matter export in the steep mountain belt of the Himalaya by tracing the provenance of soil-derived lipids in riverine sediments from nested catchments with areas ranging from 370 to 57700 km2. Branched ...Other Conference Item -
Sources and proportions of modern versus aged organic carbon eroded from soils under different land-use within a Nepalese catchment – Insights from bulk and compound-specific 13C & 14C analysis in combination with novel isotope mixing models
(2018)Geophysical Research AbstractsThere is currently a lack of necessary measurements and data to fully capture the high degree of heterogeneity inorganic carbon (OC) exported from eroding landscapes. The respective fluxes of modern (biospheric) and aged OCare poorly constrained, and mechanisms controlling OC export have remained elusive. Recently, the age of riverineOC was found to increase with the proportion of human-dominated landscapes within a catchment, potentially ...Other Conference Item -
Climatic versus geochemical controls on soil organic matter stabilization and greenhouse gas emissions along altitudinal transects in different mountain regions
(2018)Geophysical Research AbstractsTerrestrial ecosystems are strongly influenced by climate change and soils are key compartments of the globalcarbon (C) cycle in terms of their potential to store or release significant amounts of C. This study is part ofthe interregional IAEA Technical Cooperation Project INT5153 “Assessing the Impact of Climate Change and itsEffects on Soil and Water Resources in Polar and Mountainous Regions” and aims to elucidate ...Other Conference Item -
Radiocarbon analysis of isoprenoid and branched Glycerol Dialkyl Glycerol Tetraethers in soils and fluvial sediments
(2020)EGUsphereOther Conference Item -
Characterization of mobilized sediments and organic matter in retrogressive thaw slumps on the Peel Plateau, NWT, Canada
(2020)EGUsphereOther Conference Item -
Permafrost organic carbon transport and degradation on a transect from the Kolyma River to the East Siberian Shelf
(2020)EGUsphereOther Conference Item