Large and active CO2 uptake by coupled carbonate weathering

Liu, Zaihua; Macpherson, G.L.; Groves, Chris; Martin, Jonathan B.; Yuan, Daoxian; Zeng, Sibo

doi:10.1016/j.earscirev.2018.05.007

Cited by 138 publications

(56 citation statements)

References 90 publications

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“…However, carbonate weathering is much faster than silicate weathering under the same conditions. Consequently, even in many carbonate-poor catchments and minor carbonate mineral weathering may also occur [42,43,44]:CaCO3+normalH2O+CO2(aq)=Ca2+(aq)+2HCO3−(aq)…”

Section: Discussionmentioning

confidence: 99%

Hydrochemistry and Dissolved Inorganic Carbon (DIC) Cycling in a Tropical Agricultural River, Mun River Basin, Northeast Thailand

Han

Song

et al. 2019

IJERPH

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Dissolved inorganic carbon isotope composition (δ13CDIC), together with major ion concentrations were measured in the Mun River and its tributaries in March 2018 to constrain the origins and cycling of dissolved inorganic carbon. In the surface water samples, the DIC content ranged from 185 to 5897 μmol/L (average of 1376 μmol/L), and the δ13CDIC of surface water ranged from −19.6‰ to −2.7‰. In spite of the high variability in DIC concentrations and partial pressure of carbon dioxide (pCO2), the δ13CDIC values of the groundwater were relatively consistent, with a mean value of −16.9 ± 1.4‰ (n = 9). Spatial changes occurred in the direction and magnitude of CO2 flux through water-air interface (FCO2). In the dry season, fluxes varied from −6 to 1826 mmol/(m2·d) with an average of 240 mmol/(m2·d). In addition to the dominant control on hydrochemistry and dissolved inorganic carbon isotope composition by the rock weathering, the impacts from anthropogenic activities were also observed in the Mun River, especially higher DIC concentration of waste water from urban activities. These human disturbances may affect the accurate estimate contributions of carbon dioxide from tropical rivers to the atmospheric carbon budgets.

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Section: Discussionmentioning

confidence: 99%

Hydrochemistry and Dissolved Inorganic Carbon (DIC) Cycling in a Tropical Agricultural River, Mun River Basin, Northeast Thailand

Han

Song

et al. 2019

IJERPH

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“…Range from IPCC Fifth Assessment Report is 1.5-4.5°C (IPCC 2014) decrease in CaCO 3 production (Riebesell et al 2000), and an increase in sedimentary CaCO 3 dissolution (Archer et al 1998), while the increase in atmospheric CO 2 and the increase in temperature lead to an increase in terrestrial CaCO 3 weathering (Liu et al 2018), all of which contribute to the neutralization response. The ocean pH evolution through the glacial cycles serves as a constraint on this response time, but it is complicated by a significant deglacial increase in shallow-water CaCO 3 deposition on flooding continental shelves (Milliman 1993).…”

Section: ) Dt2xmentioning

confidence: 99%

The ultimate cost of carbon

2020

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We estimate the potential ultimate cost of fossil-fuel carbon to a long-lived human population over a one million–year time scale. We assume that this hypothetical population is technologically stationary and agriculturally based, and estimate climate impacts as fractional decreases in economic activity, potentially amplified by a human population response to a diminished human carrying capacity. Monetary costs are converted to units of present-day dollars by multiplying the future damage fractions by the present-day global world production, and integrated through time with no loss due from time-preference discounting. Ultimate costs of C range from $10k to $750k per ton for various assumptions about the magnitude and longevity of economic impacts, with a best-estimate value of about $100k per ton of C. Most of the uncertainty arises from the economic parameters of the model and, among the geophysical parameters, from the climate sensitivity. We argue that the ultimate cost of carbon is a first approximation of our potential culpability to future generations for our fossil energy use, expressed in units that are relevant to us.

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“…However, its role on regulating global atmospheric CO 2 becomes relevant over short timescales. This is due to the quick kinetic dissolution [12] getting to the control of DIC concentrations in almost all carbonated catchment areas [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

“…Among the parameters that play a role in the dissolution of carbonates, we can highlight hydrology [29,32], climate [17,33], land-use/vegetation [34,35], lithology [7,36,37], and human activities [38,39].…”

Section: Introductionmentioning

confidence: 99%

A Forty-Year Karstic Critical Zone Survey (Baget Catchment, Pyrenees-France): Lithologic and Hydroclimatic Controls on Seasonal and Inter-Annual Variations of Stream Water Chemical Composition, pCO2, and Carbonate Equilibrium

Ulloa-Cedamanos

Probst

Binet

et al. 2020

Water

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The long-term trends and seasonal patterns of stream water chemical composition in a small remote forested karst catchment, were investigated from 1978 to 2018. Calcium, magnesium, and bicarbonates, the dominant ions, increased over the period together with temperature, while sulfates decreased. Carbonate and sulfate mineral dissolution was the main source of these elements. These trends and the seasonal opposite patterns of discharge vs. temperature, calcite saturation index vs. pCO2 and bicarbonate vs. sulfates, suggested the influence of discharge, of reduced long-range atmospheric pollution, and of increasing air temperature on biological activity and carbonate dissolution. Furthermore, the hydrological regime controlled the seasonal stream water chemical composition and fluxes by: (i) a dilution during the high discharge period, (ii) a change in the contribution rate of the waters draining different lithological areas in the catchment, e.g., the increased sulfates to bicarbonates ratio during summer low flows, with a maximum alkalinity decrease of 24%, and (iii) a “piston” and a “flushing” effects of dissolved elements stored in soils and epikarst with the first autumn heavy rains. Long-term stream water hydrochemical surveys of karst system have proved to be powerful indicators of biogeochemical processes, water sources and pathways under variable natural and anthropogenic environmental pressure conditions.

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Large and active CO2 uptake by coupled carbonate weathering

Cited by 138 publications

References 90 publications

Hydrochemistry and Dissolved Inorganic Carbon (DIC) Cycling in a Tropical Agricultural River, Mun River Basin, Northeast Thailand

Hydrochemistry and Dissolved Inorganic Carbon (DIC) Cycling in a Tropical Agricultural River, Mun River Basin, Northeast Thailand

The ultimate cost of carbon

A Forty-Year Karstic Critical Zone Survey (Baget Catchment, Pyrenees-France): Lithologic and Hydroclimatic Controls on Seasonal and Inter-Annual Variations of Stream Water Chemical Composition, pCO2, and Carbonate Equilibrium

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