Loeka L. Jongejans

Large stocks of permafrost soil organic carbon and nitrogen in Arctic river deltas

Matthias Fuchs, Torsten Sachs, Loeka L. Jongejans, Jens Strauss et autres

Arctic deltas are highly dynamic environments at the land-ocean interface that have acted as long-term sinks of sediment, carbon (C), and nitrogen (N). Climate impacts Arctic deltas and their upstream catchments through sea-level rise, altered river discharge, increased sediment fluxes, intensified biogeochemical …

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Why drained peatlands differ across Europe: drivers, impacts and responses in a DPSIR-based literature review

Loeka L. Jongejans, Ype van der Velde

Drainage-driven peatland degradation in Europe has led to widespread loss of peatland functions, including important regulating ecosystem services such as climate and water regulation. European peatlands have been formed, used and managed in different ways, resulting in contrasting land-use practices and rewetting …

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Correction: Tracing recent large herbivore influence on soil carbon in permafrost and seasonally frozen Arctic ground using lipid biomarkers: a pilot study

Torben Windirsch, Kai Mangelsdorf, Guido Grosse, Juliane Wolter et autres

In the originally published article, a funding source was omitted (in error) from the Funding information statement. The Funding information statement has been updated, and the article HTML and PDF versions have been corrected.

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Tracing recent large herbivore influence on soil carbon in permafrost and seasonally frozen Arctic ground using lipid biomarkers: a pilot study

Torben Windirsch, Kai Mangelsdorf, Guido Grosse, Juliane Wolter et autres

This study investigates the impact of large herbivores on soil organic matter (OM) stability in Arctic permafrost and seasonally frozen ground ecosystems, focusing on the potential preservation effect of grazing. Soil samples were collected from Siberian and Finnish permafrost and nonpermafrost areas …

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Greenhouse Gas Production and Microbial Response During the Transition From Terrestrial Permafrost to a Marine Environment

Maren Jenrich, Michael Angelopoulos, Susanne Liebner, Claire Clark Treat et autres

ABSTRACT Arctic permafrost coasts, affected by rising sea levels and increasing coastal erosion in a warming climate, undergo significant changes. Simulating how permafrost is impacted by inundation with fresh, brackish and marine water enhances our understanding of permafrost carbon stock responses to …

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A Third of Organic Carbon Is Mineral Bound in Permafrost Sediments Exposed by the World's Largest Thaw Slump, Batagay, Siberia

Maxime Thomas, Loeka L. Jongejans, Jens Strauß, Chloé Vermylen et autres

ABSTRACT Organic carbon (OC) in permafrost interacts with the mineral fraction of soil and sediments, representing < 1% to ~80% of the total OC pool. Quantifying the nature and controls of mineral–OC interactions is therefore crucial for realistic assessments of permafrost‐carbon‐climate feedbacks, …

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Potential nitrogen mobilisation from the Yedoma permafrost domain

Jens Strauß, Maija E. Marushchak, Lona van Delden, Tina Sanders et autres

Abstract Permafrost regions, characterised by extensive belowground excess ice, are highly vulnerable to rapid thaw, particularly in areas such as the Yedoma domain. This region is known to freeze-lock a globally significant stock of soil nitrogen (N). However, the fate of this …

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Nachtlichter App

Andrea Gokus, Andreas Hänel, Andreas Ruby, Arne Dröge-Rothaar et autres

The relationship between satellite based measurements of city radiance at night and the numbers and types of physical lights installed on the ground is not well understood. Here we present the “Nachtlichter app”, which was developed to enable citizen scientists to classify …

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Die Feuerkugel-App

Sina Truckenbrodt, Tim Surber, Manh Khoi Ngo, Loeka L. Jongejans et autres

Nachtlicht-BueHNE: Feuerkugel-App Was sind Feuerkugeln?• Sehr

Evolution of Fe oxides crystallinity in permafrost deposits from mid-Pleistocene to Holocene: implications for mineral organic carbon interactions

Maxime Thomas, Loeka L. Jongejans, Jens Strauß, Chloé Vermylen et autres

Mineral-organic carbon (OC) interactions are involved in the geochemical stability of OC and thus in the susceptibility of permafrost to release greenhouse gases. Those so-called stabilizing or protecting interactions - accounting for ~30 % to ~80 % of permafrost soil OC - …

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Landforms and degradation pattern of the Batagay thaw slump, Northeastern Siberia

Alexander I. Kizyakov, Sebastian Wetterich, Frank Günther, Thomas Opel et autres

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A globally relevant stock of soil nitrogen in the Yedoma permafrost domain

Jens Strauß, Christina Biasi, Tina Sanders, Benjamin W. Abbott et autres

Nitrogen regulates multiple aspects of the permafrost climate feedback, including plant growth, organic matter decomposition, and the production of the potent greenhouse gas nitrous oxide. Despite its importance, current estimates of permafrost nitrogen are highly uncertain. Here, we compiled a dataset of …

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