Geochemistry of dissolved inorganic carbon and carbonate weathering in a small typical karstic catchment of Southwest China: Isotopic and chemical constraints

Li, Siliang; Liu, Cong‐Qiang; Li, Jun; Lang, Yunchao; Ding, Hu; Li, Longbo

doi:10.1016/j.chemgeo.2010.08.013

Cited by 132 publications

(142 citation statements)

References 34 publications

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“…The processes not only vary seasonally but also control carbon input and output in the aquatic system, creating variations in DIC and d 13 C DIC . Although investigations of DIC concentration and d 13 C DIC in freshwater environments have been carried out recently by many researchers (Han et al, 2010;Zhao et al, 2010;Kanduč et al, 2012;Tsypin and Macpherson, 2012), studies on variations of inorganic carbon systems in the karst catchments on multiple time scales (e.g., the annual, seasonal and storm-event scale) are still very limited (Hélie et al, 2002;Liu et al, 2004Liu et al, , 2007Guo et al, 2008;Li et al, 2010;Zhao et al, 2010). Thus, our understanding of the DIC and d 13 C DIC variations and their controlling factors at seasonal to long term scales in karst aquatic systems needs further investigation, especially under different land covers in different karst areas due to changes in biological activities, nutrient loads and the processes of mutual interaction that may occur (Harris, 1999).…”

Section: Introductionmentioning

confidence: 99%

Response of dissolved inorganic carbon (DIC) and δ13CDIC to changes in climate and land cover in SW China karst catchments

Zhao

Liu

et al. 2015

Geochimica et Cosmochimica Acta

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Section: Introductionmentioning

confidence: 99%

Response of dissolved inorganic carbon (DIC) and δ13CDIC to changes in climate and land cover in SW China karst catchments

Zhao

Liu

et al. 2015

Geochimica et Cosmochimica Acta

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“…while the increasing environmental pollution, both deliberate and unintentional forms as consequence of human activities, has to a great extent spoiled sensitive karst hydrological systems in Southwest China (Liu et al 2006Jiang et al 2008Jiang et al , 2009aJiang et al , 2009bJiang 2012;Pu et al 2011). Concentrations of nitrate and sulphate of karst groundwater in southwest China increase notably as a result of large amount of chemical fertilizers used in agriculture (Liu et al 2006;Jiang et al 2008Jiang et al , 2009aJiang et al , 2009bJiang 2012;Pu et al 2011) and acid deposition (Li et al , 2010, which could not only influence the quality of karst groundwater, as well as the carbonate weathering process related to the global carbon cycle.…”

Section: Izvlečekmentioning

confidence: 99%

“…However, recently increases in the inorganic carbon flux in karst groundwater have been linked to agricultural activities and acid precipitation (Semhi et al 2000;Calmels et al 2007;Li et al , 2010Perrin et al 2008;Barnes & Raymond 2009;Ali & Atekwana 2011;Gandois et al 2011;Jiang 2013;yue et al 2015).…”

Section: Izvlečekmentioning

confidence: 99%

The effects of agricultural activities and atmospheric acid deposition on carbonate weathering in a small karstic agricultural catchment, Southwest China

Chen¹,

Jiang

2016

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Vpliv kmetijske dejavnosti in kislih usedlin iz zraka na preperevanje karbonatov na majhnem kraškem kmetijskem območju na jugozahodu Kitajske Da bi določili izvor in tok DIC (raztopljen anorganski ogljik) smo vrednotili učinek uporabe dušikovih gnojil in kislih usedlin na preperevanje karbonatov. Pri tem smo se poslužili hidrokemičnih postopkov in analize δ 13 C DIC podzemne vode v kraškem zaledju reke Quinmugan (QURS), ki je del manjšega kmetijskega območja na jugozahodu Kitajske. Rezultati so pokazali naslednje: (1) Izmerjene so bile opazne časovne spremembe v koncentraciji glavnih elementov in δ 13 C DIC v podzemni vodi v različnih mesecih; to je še posebej očitno v deževnem obdobju in času gnojenja, ko so bile zabeležene izrazito povečane koncentracije DIC, Ca ) and HCO 3 − of groundwater in different months averaged 11.1 % and 6.7 %, respectively, and the contributions of carbonate dissolution by sulphuric acid originated from the atmospheric acid deposition to total concentrations of (Ca

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“…Factors affecting weathering rates in carbonate-silicate settings are complex, spatially diverse and debated in the literature (Tipper et al, 2006a;Li et al, 2010;Pokrovsky et al, 2011). Nevertheless, rainwater abundance and residence time in the soil as well as biogenic soil activity are considered significant (Tipper et al, 2006a(Tipper et al, , 2010Li et al, 2010).…”

Section: Warm-(semi-)arid Climate: Speleothem Time Series δ 26 Mg Datmentioning

confidence: 99%

“…Nevertheless, rainwater abundance and residence time in the soil as well as biogenic soil activity are considered significant (Tipper et al, 2006a(Tipper et al, , 2010Li et al, 2010). Related to these factors, changes in the soil clay mineral to host limestone weathering balance affect the soil and aquifer water δ 26 Mg values.…”

Section: Warm-(semi-)arid Climate: Speleothem Time Series δ 26 Mg Datmentioning

confidence: 99%

The magnesium isotope record of cave carbonate archives

et al. 2012

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Abstract.Here we explore the potential of magnesium (δ 26 Mg) isotope time-series data as continental climate proxies in speleothem calcite archives. For this purpose, a total of six Pleistocene and Holocene stalagmites from caves in Germany, Morocco and Peru and two flowstones from a cave in Austria were investigated. These caves represent the semiarid to arid (Morocco), the warm-temperate (Germany), the equatorial-humid (Peru) and the cold-humid (Austria) climate zones. Changes in the calcite magnesium isotope signature with time are compared against carbon and oxygen isotope records from these speleothems. Similar to other proxies, the non-trivial interaction of a number of environmental, equilibrium and disequilibrium processes governs the δ 26 Mg fractionation in continental settings. These include the different sources of magnesium isotopes such as rainwater or snow as well as soil and host rock, soil zone biogenic activity, shifts in silicate versus carbonate weathering ratios and residence time of water in the soil and karst zone. Pleistocene stalagmites from Morocco show the lowest mean δ 26 Mg values (GDA: −4.26 ± 0.07 ‰ and HK3: −4.17 ± 0.15 ‰), and the data are well explained in terms of changes in aridity over time. The Pleistocene to Holocene stalagmites from Peru show the highest mean value of all stalagmites (NC-A and NC-B δ 26 Mg: −3.96 ± 0.04 ‰) but only minor variations in Mg-isotope composition, which is consistent with the rather stable equatorial climate at this site. Holocene stalagmites from Germany (AH-1 mean δ 26 Mg: −4.01 ± 0.07 ‰; BU 4 mean δ 26 Mg: −4.20 ± 0.10 ‰) suggest changes in outside air temperature was the principal driver rather than rainfall amount. The alpine Pleistocene flowstones from Austria (SPA 52: −3.00 ± 0.73 ‰; SPA 59: −3.70 ± 0.43 ‰) are affected by glacial versus interglacial climate change with outside air temperature affecting soil zone activity and weathering balance. Several δ 26 Mg values of the Austrian and two δ 26 Mg values of the German speleothems are shifted to higher values due to sampling in detrital layers (Mg-bearing clay minerals) of the speleothems. The data and their interpretation shown here highlight the potential but also the limitations of the magnesium isotope proxy applied in continental climate research. An obvious potential lies in its sensitivity for even subtle changes in soil-zone parameters, a hitherto rather poorly understood but extremely important component in cave archive research. Limitations are most obvious in the low resolution and high sample amount needed for analysis. Future research should focus on experimental and conceptual aspects including quantitative and well-calibrated leaching and precipitation experiments.

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Geochemistry of dissolved inorganic carbon and carbonate weathering in a small typical karstic catchment of Southwest China: Isotopic and chemical constraints

Cited by 132 publications

References 34 publications

Response of dissolved inorganic carbon (DIC) and δ13CDIC to changes in climate and land cover in SW China karst catchments

Response of dissolved inorganic carbon (DIC) and δ13CDIC to changes in climate and land cover in SW China karst catchments

The effects of agricultural activities and atmospheric acid deposition on carbonate weathering in a small karstic agricultural catchment, Southwest China

The magnesium isotope record of cave carbonate archives

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