Christoph Vogt
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View article: Natural ocean alkalinization through erosion of glacial till and weathering at the seafloor
Natural ocean alkalinization through erosion of glacial till and weathering at the seafloor Open
The ocean absorbs about 25% of anthropogenic carbon dioxide emissions, with this uptake regulated by acid-neutralizing anions collectively termed alkalinity. Most seawater alkalinity originates from the weathering of aluminosilicate and ca…
View article: Diffusive and advective fluid flow shapes chemoautotrophic bacterial communities and sulfur mineralogy in hydrothermal sediments off Milos
Diffusive and advective fluid flow shapes chemoautotrophic bacterial communities and sulfur mineralogy in hydrothermal sediments off Milos Open
Hydrothermal fluid flow not only shapes mineral deposition on the ocean floor but also creates ecological niches by altering temperature and energy availability. In these niches, microbial life thrives and has an additional, often unrecogn…
View article: Biomarker evidence of a serpentinite chemosynthetic biosphere at the Mariana forearc
Biomarker evidence of a serpentinite chemosynthetic biosphere at the Mariana forearc Open
Present-day serpentinization systems, such as that at the Mariana forearc, are prominent sources of reduced volatiles, including molecular hydrogen (H 2 ) and methane (CH 4 ), and are considered analogs for chemosynthetic ecosystems on ear…
View article: Geochemical and mineralogical characteristics of fjord sediments in Arctic Svalbard: insights into Holocene glacial activity and weathering variability
Geochemical and mineralogical characteristics of fjord sediments in Arctic Svalbard: insights into Holocene glacial activity and weathering variability Open
The Svalbard archipelago at the border of the Arctic Ocean experiences substantial glacier retreat due to global warming, resulting in a retreat of glacier termini from the marine to terrestrial settings. However, the impact of these trans…
View article: Holocene to Eemian sea ice and terrigenous influx variations in Baffin Bay – a lipid biomarker study
Holocene to Eemian sea ice and terrigenous influx variations in Baffin Bay – a lipid biomarker study Open
Sea ice and ice sheets are highly sensitive to climate change in the Arctic, which shows an amplified response to global warming. To better understand the environmental changes and feedback processes associated with Arctic sea-ice decline …
View article: Late Quaternary Glaciations on the Chukchi Margin, Arctic Ocean: Insights from Echo Sounding and Sediment Records
Late Quaternary Glaciations on the Chukchi Margin, Arctic Ocean: Insights from Echo Sounding and Sediment Records Open
Glacigenic bedforms such as multiple glacial lineations and moraines on the Chukchi and East Siberian margins reveal recurrent waxing and waning by voluminous ice masses. Despite their paleoclimatic significance, the timing, geographic dis…
View article: Vegetation and climate dynamics at the dawn of human settlement: multiproxy palaeoenvironmental evidence from the Hashilan Wetland, western Iran
Vegetation and climate dynamics at the dawn of human settlement: multiproxy palaeoenvironmental evidence from the Hashilan Wetland, western Iran Open
The scarcity of high‐resolution palaeoclimate records from the interior of West Asia has limited our understanding of the mechanisms of past climate change and their potential impacts on early human societies of the Eastern Fertile Crescen…
View article: Omnipresent authigenic calcite distorts Arctic radiocarbon chronology
Omnipresent authigenic calcite distorts Arctic radiocarbon chronology Open
As calcareous foraminifera precipitate their shells from the surrounding water mass, they are the basis of most marine radiocarbon chronologies and paleo-proxies. Nevertheless, post-mortem alteration of shells, especially addition of authi…
View article: Coastal El Niño triggers rapid marine silicate alteration on the seafloor
Coastal El Niño triggers rapid marine silicate alteration on the seafloor Open
Marine silicate alteration plays a key role in the global carbon and cation cycles, although the timeframe of this process in response to extreme weather events is poorly understood. Here we investigate surface sediments across the Peruvia…
View article: Mineral and isotopic (Nd, Sr) signature of fine-grained deglacial and Holocene sediments from the Mackenzie Trough, Arctic Canada
Mineral and isotopic (Nd, Sr) signature of fine-grained deglacial and Holocene sediments from the Mackenzie Trough, Arctic Canada Open
Dolomites in Arctic Ocean sediments are widely attributed to erosion and transport of sediments from northern Canada and Greenland. Coarse-grained dolomite-rich ice-rafted debris is often linked to iceberg transport, but the origin of fine…
View article: Deglacial to Holocene changes in sediment characteristics and provenance in core GeoB22336-4 from Lancaster Sound Trough Mouth: Implications for environmental conditions in northwestern Baffin Bay
Deglacial to Holocene changes in sediment characteristics and provenance in core GeoB22336-4 from Lancaster Sound Trough Mouth: Implications for environmental conditions in northwestern Baffin Bay Open
<p>The Lancaster Sound is currently one of the pathways for Arctic water and ice entering Baffin Bay. However, this gateway was blocked by the coalescing Laurentide and Innuitian Ice Sheets during the Last Glacial Maximum and only op…
View article: Kinetics of Olivine Weathering in Seawater: An Experimental Study
Kinetics of Olivine Weathering in Seawater: An Experimental Study Open
Enhanced weathering of mafic and ultra-mafic minerals has been suggested as a strategy for carbon dioxide removal (CDR) and a contribution to achieve a balance between global CO 2 sources and sinks (net zero emission). This study was desig…
View article: Holocene variability of the northeastern Laurentide Ice Sheet in the Clyde Inlet area, western Baffin Bay, from radiogenic isotope records in marine sediments
Holocene variability of the northeastern Laurentide Ice Sheet in the Clyde Inlet area, western Baffin Bay, from radiogenic isotope records in marine sediments Open
<p>The reconstruction of late glacial ice sheet fluctuations helps understanding and modelling the local glacio-isostatic adjustment as well as global eustatic changes. From this viewpoint, the large-scale spatial and temporal variat…
View article: Elevated dust depositions in West Asia linked to ocean–atmosphere shifts during North Atlantic cold events
Elevated dust depositions in West Asia linked to ocean–atmosphere shifts during North Atlantic cold events Open
Significance North Atlantic cold events in the past have been shown to cause large-scale atmospheric reorganizations. Results of our dust record from southeastern Iran, which is highly susceptible to capture dust storms from North Africa a…
View article: XRF, XRD, grainsize and total organic carbon in core Konar Sandal peat bog, SE Iran
XRF, XRD, grainsize and total organic carbon in core Konar Sandal peat bog, SE Iran Open
Rapid North Atlantic cooling events during the last deglaciation caused atmospheric reorganizations on global and regional scales. Their impact on Asian climate has been investigated for monsoonal domains, but remains largely unknown in we…
View article: ERRATUM: Lithologic control of frictional strength variations in subduction zone sediment inputs
ERRATUM: Lithologic control of frictional strength variations in subduction zone sediment inputs Open
In the PDF for this paper, horizontal axes labels of Figure 14 are cut off because of a typesetting error
View article: Sources of laminated sediments in the northeastern Arabian Sea off Pakistan and implications for sediment transport mechanisms during the late Holocene
Sources of laminated sediments in the northeastern Arabian Sea off Pakistan and implications for sediment transport mechanisms during the late Holocene Open
Laminated sediments of the continental slope off the Makran coast in the northern Arabian Sea are well-known climate archives and record productivity, as well as supply of material from land. Here, we studied sediment core 275KL off Pakist…
View article: Lithologic control of frictional strength variations in subduction zone sediment inputs
Lithologic control of frictional strength variations in subduction zone sediment inputs Open
At convergent margins, marine sediments deposited seaward of the subduction zone forearc on the incoming plate (the "subduction inputs") represent the initial condition for geomechanical processes during subduction. The frictional strength…
View article: Apsorption units at wavenumbers and mineral content of several samples
Apsorption units at wavenumbers and mineral content of several samples Open
In paleoenvironmental studies, the mineralogical composition of sediments is an important indicator. In combination with other indicators, they contribute to the understanding of changes in sediment sourcing as well as in weathering and de…