Rivers of North-Rhine Westphalia revisited: Tracing changes in river chemistry

Stögbauer, Andrea; Strauß, Harald; Arndt, Julia; Marek, Victoria; Einsiedl, Florian; Geldern, Robert van

doi:10.1016/j.apgeochem.2008.06.030

Cited by 25 publications

(13 citation statements)

References 17 publications

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“…Natural abundance of stable carbon isotopes can be used either qualitatively [ Ahad et al ., ; Amiotte‐Suchet et al , ; Barth et al , ; Cartwright , ; Doctor et al , ; Kanduč et al , ; Stögbauer et al , ; Telmer and Veizer , ] or quantitatively, such as via a linear mixing model based on isotopic mass balances [ Aucour et al , ; Cole and Caraco , ; Hagedorn and Cartwright , ; Kanduč et al , ; van Geldern et al , ; Waldron et al , ]. Systematics of stable isotopes is available in Clark and Fritz [] and Coplen [].…”

Section: Carbon Isotope Applicationsmentioning

confidence: 99%

A review of CO₂ and associated carbon dynamics in headwater streams: A global perspective

Marx

Dušek

Jankovec

et al. 2017

Reviews of Geophysics

270

216

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Terrestrial carbon export via inland aquatic systems is a key process in the global carbon cycle. It includes loss of carbon to the atmosphere via outgassing from rivers, lakes, or reservoirs and carbon fixation in the water column as well as in sediments. This review focuses on headwater streams that are important because their stream biogeochemistry directly reflects carbon input from soils and groundwaters. Major drivers of carbon dioxide partial pressures (pCO2) in streams and mechanisms of terrestrial dissolved inorganic, organic and particulate organic carbon (DIC, DOC, and POC) influxes are summarized in this work. Our analysis indicates that the global river average pCO2 of 3100 ppmV is more often exceeded by contributions from small streams when compared to rivers with larger catchments (> 500 km2). Because of their large proportion in global river networks (> 96% of the total number of streams), headwaters contribute large—but still poorly quantified—amounts of CO2 to the atmosphere. Conservative estimates imply that globally 36% (i.e., 0.93 Pg C yr−1) of total CO2 outgassing from rivers and streams originate from headwaters. We also discuss challenges in determination of CO2 sources, concentrations, and fluxes. To overcome uncertainties of CO2 sources and its outgassing from headwater streams on the global scale, new investigations are needed that should include groundwater data. Such studies would also benefit from applications of integral CO2 outgassing isotope approaches and multiscale geophysical imaging techniques.

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Section: Carbon Isotope Applicationsmentioning

confidence: 99%

A review of CO₂ and associated carbon dynamics in headwater streams: A global perspective

Marx

Dušek

Jankovec

et al. 2017

Reviews of Geophysics

270

216

View full text Add to dashboard Cite

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“…In addition to the aforementioned CO 2 flux studies, numerous studies applied carbon stable isotopes to investigate origin and fate of aqueous carbon in various riverine systems (e.g. Vogel, 1993;Yang et al, 1996;Amiotte-Suchet et al, 1999;Karim and Veizer, 2000;Hélie et al, 2002;Barth et al, 2003;Stögbauer et al, 2008;Schulte et al, 2011;Tripti et al, 2013). Temporal and spatial patterns in stable carbon isotope compositions of dissolved inorganic carbon (δ 13 C DIC ) helped to reveal the origin of carbon input to the rivers and provide information on carbon turnover along the river course (e. g. Dandurand et al, 1982;Aucour et al, 1999;Kanduč et al, 2007;de Montety et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Spatial and temporal variations of pCO₂, dissolved inorganic carbon and stable isotopes along a temperate karstic watercourse

Geldern

Schulte

Mäder

et al. 2015

Hydrological Processes

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This study investigated CO2 degassing and related carbon isotope fractionation effects in the Wiesent River that drains a catchment in the karst terrain of the Franconian Alb, Southern Germany. The river was investigated by physico‐chemical and stable isotope analyses of water and dissolved inorganic carbon during all seasons along 65‐km long downstream transects between source and mouth. Calculated pCO2 values at the source were 21 400 ± 2400 µatm. The pCO2 rapidly decreased in the river water and dropped to an average of 1240 ± 330 µatm near the mouth. About 90% of this decrease occurred within the first 6 km of the river. The river was supersaturated with respect to CO2 over its entire course and must have acted as a continuous year‐round CO2 source to the atmosphere. The average CO2 flux from the karst river was estimated with 450 mmol m−2 day−1 with higher fluxes up to 5680 mmol m−2 day−1 at the source. At the source, δ13CDIC values showed no seasonal variations with an average of −14.2 ± 0.2‰. This indicated that groundwater retained high pCO2 mainly from soil CO2. The contribution of soil CO2 to dissolved inorganic carbon was estimated at 65% to 72%. The downstream CO2 loss caused a positive shift in δ13CDIC values of 2‰ between source and mouth because of the preferential loss of the 12C isotope during degassing. Considering the findings of this study and the fact that carbonate lithology covers a significant part of the earth's surface, CO2 evasion from karst regions might contribute notably to the annual carbon dioxide release from global freshwater systems. Copyright © 2015 John Wiley & Sons, Ltd.

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“…However, is their discharge from industrial plants that give that levels exceed permitted concentrations. Therefore, wherever humans have caused metals to be released from the rocks in which they were once deposited as a result of volcanic activity or subsequent erosion, they become contaminants (Stögbauer et al, 2008).…”

Section: Metal In Surface Watersmentioning

confidence: 99%

“…Substances enter the waters as a result of natural processes, the so-called admixtures (Figure 1), and also compounds from anthropogenic activities, which contaminate waters (Stögbauer et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

The speciation and physico-chemical forms of metals in surface waters and sediments

Namieśnik

Rabajczyk

2010

Chemical Speciation & Bioavailability

143

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Surface waters can be contaminated in many ways, e.g., by solutions and suspended matter. Moreover, insoluble substances in colloidal form, in suspension or adsorbed on solid bodies can dissolve in response to changing physical and chemical conditions and become a secondary source of surface water pollution, thereby endangering wildlife. In addition, if we take into account varying rates of flow, contaminants can be transported over considerable distances. Hydrological processes, which determine factors, such as the rate of sedimentation, also influence the quality of surface waters; bottom sediments can contain large quantities of accumulated organic and inorganic compounds, including heavy metals. The physical and chemical properties of aquatic ecosystems are characterized by a number of interdependent parameters. Hence, factors such as temperature, oxygen content and pH of a water body can alter the solubility of the salts present in it, the forms of occurrence of particular species, as well as their bioavailability and toxicity. Thus it is necessary to determine the various species of metals present in the different compartments of the aquatic ecosystem.

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Rivers of North-Rhine Westphalia revisited: Tracing changes in river chemistry

Cited by 25 publications

References 17 publications

A review of CO₂ and associated carbon dynamics in headwater streams: A global perspective

A review of CO₂ and associated carbon dynamics in headwater streams: A global perspective

Spatial and temporal variations of pCO₂, dissolved inorganic carbon and stable isotopes along a temperate karstic watercourse

The speciation and physico-chemical forms of metals in surface waters and sediments

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Rivers of North-Rhine Westphalia revisited: Tracing changes in river chemistry

Cited by 25 publications

References 17 publications

A review of CO2 and associated carbon dynamics in headwater streams: A global perspective

A review of CO2 and associated carbon dynamics in headwater streams: A global perspective

Spatial and temporal variations of pCO2, dissolved inorganic carbon and stable isotopes along a temperate karstic watercourse

The speciation and physico-chemical forms of metals in surface waters and sediments

Contact Info

Product

Resources

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A review of CO₂ and associated carbon dynamics in headwater streams: A global perspective

A review of CO₂ and associated carbon dynamics in headwater streams: A global perspective

Spatial and temporal variations of pCO₂, dissolved inorganic carbon and stable isotopes along a temperate karstic watercourse