26 results match your criteria: "Department of Geological Sciences and Bolin Centre for Climate Research[Affiliation]"
Sci Rep
January 2025
Florida State University, Tallahassee, FL, 32306-2400, USA.
Sphagnum-dominated bogs are climatically impactful systems that exhibit two puzzling characteristics: CO:CH ratios are greater than those predicted by electron balance models and C decomposition rates are enigmatically slow. We hypothesized that Maillard reactions partially explain both phenomena by increasing apparent CO production via eliminative decarboxylation and sequestering bioavailable nitrogen (N). We tested this hypothesis using incubations of sterilized Maillard reactants, and live and sterilized bog peat.
View Article and Find Full Text PDFNat Chem
February 2023
Department of Geological Sciences and Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden.
Glob Chang Biol
February 2022
Department of Environmental Science, University of Arizona, Tucson, Arizona, USA.
Permafrost thaw is a major potential feedback source to climate change as it can drive the increased release of greenhouse gases carbon dioxide (CO ) and methane (CH ). This carbon release from the decomposition of thawing soil organic material can be mitigated by increased net primary productivity (NPP) caused by warming, increasing atmospheric CO , and plant community transition. However, the net effect on C storage also depends on how these plant community changes alter plant litter quantity, quality, and decomposition rates.
View Article and Find Full Text PDFGlob Chang Biol
December 2020
Beijing Research & Development Centre for Grass and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China.
Globally, soils store two to three times as much carbon as currently resides in the atmosphere, and it is critical to understand how soil greenhouse gas (GHG) emissions and uptake will respond to ongoing climate change. In particular, the soil-to-atmosphere CO flux, commonly though imprecisely termed soil respiration (R ), is one of the largest carbon fluxes in the Earth system. An increasing number of high-frequency R measurements (typically, from an automated system with hourly sampling) have been made over the last two decades; an increasing number of methane measurements are being made with such systems as well.
View Article and Find Full Text PDFPhilos Trans R Soc Lond B Biol Sci
October 2020
Department of Forest Ecology and Management, Swedish Agricultural University, Umeå, Sweden.
We analysed the effect of the 2018 European drought on greenhouse gas (GHG) exchange of five North European mire ecosystems. The low precipitation and high summer temperatures in Fennoscandia led to a lowered water table in the majority of these mires. This lowered both carbon dioxide (CO) uptake and methane (CH) emission during 2018, turning three out of the five mires from CO sinks to sources.
View Article and Find Full Text PDFNat Rev Chem
June 2020
Department of Geological Sciences and Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden.
Nat Chem
February 2019
Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, Worcester, MA, USA.
Nat Chem
February 2019
Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, Worcester, MA, USA.
In the version of this Comment originally published, the image was incorrectly credited to Chelsea Anne Bar; it should have been to Brett F. Thornton. This has now been corrected.
View Article and Find Full Text PDFNat Chem
January 2019
Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, Worcester, MA, USA.
Nat Chem
October 2018
Department of Geological Sciences and Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden.
Nature
August 2018
Australian Centre for Ecogenomics, School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, Queensland, Australia.
As global temperatures rise, large amounts of carbon sequestered in permafrost are becoming available for microbial degradation. Accurate prediction of carbon gas emissions from thawing permafrost is limited by our understanding of these microbial communities. Here we use metagenomic sequencing of 214 samples from a permafrost thaw gradient to recover 1,529 metagenome-assembled genomes, including many from phyla with poor genomic representation.
View Article and Find Full Text PDFISME J
October 2018
Australian Centre for Ecogenomics, School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, QLD, Australia.
The fate of carbon sequestered in permafrost is a key concern for future global warming as this large carbon stock is rapidly becoming a net methane source due to widespread thaw. Methane release from permafrost is moderated by methanotrophs, which oxidise 20-60% of this methane before emission to the atmosphere. Despite the importance of methanotrophs to carbon cycling, these microorganisms are under-characterised and have not been studied across a natural permafrost thaw gradient.
View Article and Find Full Text PDFNat Chem
June 2018
The Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, Worcester, MA, USA.
Nat Chem
January 2018
Department of Geological Sciences and Bolin Centre for Climate Research, Stockholm University, 106 91 Stockholm, Sweden.
Nat Commun
November 2017
Department of Aquatic Ecology and Environmental Biology, Institute for Water and Wetland Research, Radboud University, P.O. Box 9010, 6500 GL, Nijmegen, The Netherlands.
Methane (CH) strongly contributes to observed global warming. As natural CH emissions mainly originate from wet ecosystems, it is important to unravel how climate change may affect these emissions. This is especially true for ebullition (bubble flux from sediments), a pathway that has long been underestimated but generally dominates emissions.
View Article and Find Full Text PDFSci Rep
October 2017
Stockholm University, Department of Geological Sciences and Bolin Centre for Climate Research, SE-106 91, Stockholm, Sweden.
The seafloor sediments of Spathi Bay, Milos Island, Greece, are part of the largest arsenic-CO-rich shallow submarine hydrothermal ecosystem on Earth. Here, white and brown deposits cap chemically distinct sediments with varying hydrothermal influence. All sediments contain abundant genes for autotrophic carbon fixation used in the Calvin-Benson-Bassham (CBB) and reverse tricaboxylic acid (rTCA) cycles.
View Article and Find Full Text PDFNature
October 2017
British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK.
Marine ice-cliff instability (MICI) processes could accelerate future retreat of the Antarctic Ice Sheet if ice shelves that buttress grounding lines more than 800 metres below sea level are lost. The present-day grounding zones of the Pine Island and Thwaites glaciers in West Antarctica need to retreat only short distances before they reach extensive retrograde slopes. When grounding zones of glaciers retreat onto such slopes, theoretical considerations and modelling results indicate that the retreat becomes unstable (marine ice-sheet instability) and thus accelerates.
View Article and Find Full Text PDFNat Commun
October 2017
Department of Geological Sciences and Bolin Centre for Climate Research, Stockholm University, SE106-91, Stockholm, Sweden.
Volcanic eruptions can impact the mass balance of ice sheets through changes in climate and the radiative properties of the ice. Yet, empirical evidence highlighting the sensitivity of ancient ice sheets to volcanism is scarce. Here we present an exceptionally well-dated annual glacial varve chronology recording the melting history of the Fennoscandian Ice Sheet at the end of the last deglaciation (∼13,200-12,000 years ago).
View Article and Find Full Text PDFSci Rep
July 2017
Center for Geomicrobiology, Department of Bioscience, Aarhus University, Ny Munkegade 114, 8000, Aarhus C, Denmark.
The study of active microbial populations in deep, energy-limited marine sediments has extended our knowledge of the limits of life on Earth. Typically, microbial activity in the deep biosphere is calculated by transport-reaction modelling of pore water solutes or from experimental measurements involving radiotracers. Here we modelled microbial activity from the degree of D:L-aspartic acid racemization in microbial necromass (remains of dead microbial biomass) in sediments up to ten million years old.
View Article and Find Full Text PDFNat Plants
July 2017
School of Biology and Environmental Science, Earth Institute, University College Dublin, Belfield, Dublin 4, Ireland.
Climate change is likely to have altered the ecological functioning of past ecosystems, and is likely to alter functioning in the future; however, the magnitude and direction of such changes are difficult to predict. Here we use a deep-time case study to evaluate the impact of a well-constrained CO-induced global warming event on the ecological functioning of dominant plant communities. We use leaf mass per area (LMA), a widely used trait in modern plant ecology, to infer the palaeoecological strategy of fossil plant taxa.
View Article and Find Full Text PDFNat Chem
June 2017
Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, Worcester, Massachusetts 01609-2280, USA.
Nat Chem
January 2017
Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, Worcester, Massachusetts 01609-2280, USA.
Proc Natl Acad Sci U S A
May 2016
Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB, Canada T6G 2EG.
The oxygenation of the atmosphere ∼2.45-2.32 billion years ago (Ga) is one of the most significant geological events to have affected Earth's redox history.
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December 2015
Stockholm University, Department of Geological Sciences and Bolin Centre for Climate Research, SE-106 91, Stockholm, Sweden.
Protection against arsenic damage in organisms positioned deep in the tree of life points to early evolutionary sensitization. Here, marine sedimentary records reveal a Proterozoic arsenic concentration patterned to glacial-interglacial ages. The low glacial and high interglacial sedimentary arsenic concentrations, suggest deteriorating habitable marine conditions may have coincided with atmospheric oxygen decline after ~2.
View Article and Find Full Text PDFNat Commun
November 2015
Department of Geological Sciences and Bolin Centre for Climate Research, Stockholm University, SE-10691 Stockholm, Sweden.
Sources and timing of freshwater forcing relative to hydroclimate shifts recorded in Greenland ice cores at the onset of Younger Dryas, ∼12,800 years ago, remain speculative. Here we show that progressive Fennoscandian Ice Sheet (FIS) melting 13,100-12,880 years ago generates a hydroclimate dipole with drier-colder conditions in Northern Europe and wetter-warmer conditions in Greenland. FIS melting culminates 12,880 years ago synchronously with the start of Greenland Stadial 1 and a large-scale hydroclimate transition lasting ∼180 years.
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