Climate change-driven deglaciation and erosion in high-latitude regions enhance the flux of terrigenous material to the coastal ocean. Newly exposed land surfaces left behind by retreating glaciers are covered by glacial till, which is rich in fine-grained minerals. Many of these minerals are undersaturated in seawater and thus prone to dissolution (i.e., seafloor weathering). Consequently, intensified erosion and mineral weathering may act as an additional CO₂ sink while supplying alkalinity to coastal waters. To evaluate this hypothesis, we carried out a sediment geochemical study in the southwestern Baltic Sea, where coastal erosion of glacial till is the dominant source of terrigenous material to offshore depocenters. We analyzed glacial till from coastal cliffs, sediments, and pore waters for major element composition using inductively coupled plasma optical emission spectroscopy and an elemental analyzer. Water samples were further analyzed for dissolved redox species and dissolved silica by photometry and ion chromatography. These data were then used to quantify mineral dissolution and precipitation processes and to assess their net effect on inorganic carbon cycling.
A literature retrieval was performed for whole rock geochemical analyses of sedimentary, magmatic and metamorphic rocks in the catchment of River Thuringian Saale for the past 600 Ma. Considering availability and coincidence with paleontological an facies data the following indicators seem suitable to detect environmental and climatic changes: biogenic P for Paleoproductivity, STI Index for weathering intensity, Ni/Co-ratio for redox conditions, relative enrichments of Co, Ba and Rb versus crustal values for volcanic activity at varying differentiation. The Mg/Ca-ratio as proxy for salinity is applicable in evaporites. The binary plot Nb/Y versus Zr/TiO2 indicates a presently eroded volcanic level of the Bohemian Massif as catchment area for the Middle Bunter, whereas higly differentiated volcanics provided source material for Neoproterozoic greywackes. A positive Eu-anomaly is limited to the Lower Bunter and implies mafic source rocks perhaps formerly located in the Bohemian Massif.
Die Messstelle Br. Missenstr. uh. RÜ 2 (Messstellen-Nr: 105485) befindet sich im Gewässer Konstanzer Ach. Die Messstelle dient der Überwachung des biologischen Zustands, des chemischen Zustands.
Die Messstelle uh St2064; 300m oh Mdg Starnbergersee (Messstellen-Nr: 109992) befindet sich im Gewässer NN. Die Messstelle dient der Überwachung des biologischen Zustands, des chemischen Zustands.
Die Messstelle Haiming, Fkm 4 (Messstellen-Nr: 12859) befindet sich im Gewässer Salzach. Die Messstelle dient der Überwachung des biologischen Zustands, des chemischen Zustands.
Die Messstelle Brücke bei Aidenbach (Messstellen-Nr: 96769) befindet sich im Gewässer Aidenbach. Die Messstelle dient der Überwachung des biologischen Zustands, des chemischen Zustands.
Die Messstelle Friedhofsteg (Messstellen-Nr: 17655) befindet sich im Gewässer Pegnitz. Die Messstelle dient der Überwachung des biologischen Zustands, des chemischen Zustands.
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