Spatiotemporal distribution and national measurement of the global carbonate carbon sink

Li, Huiwen; Wang, Shijie; Bai, Xiaoyong; Luo, Weijun; Tang, Hong; Cao, Yue; Wu, Luhua; Chen, Fei; Li, Qin; Zou, Cheng; Wang, Mingming

doi:10.1016/j.scitotenv.2018.06.196

Cited by 51 publications

(26 citation statements)

References 41 publications

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“…We used the MPD method to calculate the dissolution rate of limestone in China, which had been applied in quantifying karstification at global and regional scales [42][43]. The intensity of karstification can be obtained by the MPD method if the temperature, precipitation and evapotranspiration of a given area are known.…”

Section: Maximal Potential Dissolution (Mpd) Methodsmentioning

confidence: 99%

“…Based on the usual equations for the dissolution of calcite at equilibrium given in Equation (2), Gombert created the MPD method of Equation (3) for carbonate zones with the assumption that the chemical reactions were at equilibrium in local hydrological, meteorological and geochemical conditions [42][43][44][45].…”

Section: Maximal Potential Dissolution (Mpd) Methodsmentioning

confidence: 99%

“…The MPD method is applicable to all limestone areas [42][43]45]. In this study, we calculate the dissolution rate of carbonate rock on the basis of the specific corrodibility of other rocks in the carbonate rock and limestone.…”

Section: Applicability Of the Methodsmentioning

confidence: 99%

“…However, in pixels, the actual runoff depth of areas, such as Yuan, is difficult to determine through computations. Therefore, the method in [42,43] is adopted. The difference between precipitation and evaporation to replace the actual runoff depth may have a certain deviation between the two processes.…”

Section: Analysis Of Limitation Deficiency and Uncertaintymentioning

confidence: 99%

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Change Detection of Soil Formation Rate in Space and Time Based on Multi Source Data and Geospatial Analysis Techniques

et al. 2020

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Spatialization of soil formation rate (SFR) is always a difficult problem in soil genesis. In this study, the dissolution rate in karst areas of China during the period 1983–2015 was estimated on the basis of geospatial analysis techniques and detection of variation via the law of chemical thermodynamics in conjunction with long-term serial ecohydrology data. SFR at different lithological backgrounds was calculated on the basis of the content of acid-insoluble substances. Results showed that the spatial dissolution rate of carbonate rock ranges between 0 and 106 mm/ka, averaged at 22.51 mm/ka, and the SFR ranges between 10 and 134.93 t km−2 yr−1, averaged at 18.59 t km−2 yr−1. The dissolution rate and SFR exhibit a slight increasing trend with 0.04 mm/ka and 0.003 t km−2 yr−1, respectively. The risk for soil erosion was reevaluated on the basis of the SFR results, and the area with erosion risk and the ecologically safe area were corrected. Results indicated that the area with erosion risk is four times higher than the ecologically safe area. This study will hopefully instigate and facilitate the application and popularization of geospatial analysis technology to the research field of rock weathering and soil formation.

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Section: Maximal Potential Dissolution (Mpd) Methodsmentioning

confidence: 99%

Section: Maximal Potential Dissolution (Mpd) Methodsmentioning

confidence: 99%

Section: Applicability Of the Methodsmentioning

confidence: 99%

Section: Analysis Of Limitation Deficiency and Uncertaintymentioning

confidence: 99%

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Change Detection of Soil Formation Rate in Space and Time Based on Multi Source Data and Geospatial Analysis Techniques

et al. 2020

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“…In theory, each dissolved mol of CaCO 3 consumes one mol of CO 2 . Therefore, the carbon sink fluxes (CSF) can be calculated by the following equation (Li et al, 2018):…”

Section: Determination Of the Soil Loss Tolerancementioning

confidence: 99%

Estimation of soil erosion considering soil loss tolerance in karst area

Cao

Wang

Bai

et al. 2018

Preprint

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Abstract. The prediction of soil erosion is critical to regional ecological assessment and sustainable development. However, due to the geological background of the karst area, the soil holding capacity is very limited, so it is necessary to consider the allowable loss of soil. Here we took thermodynamic dissolution model of carbonate rocks and the lithological characteristics to estimate soil loss tolerance, and corrected and quantitatively evaluated the soil erosion. Major findings are as follows: (1) The soil loss tolerance of homogenous carbonate rocks is 31.10 t · ha · yr−1, carbonate rock intercalated with clastic rocks is 120.81 t · ha · yr−1, carbonate/clastic rock alternations is 282.55 t · h · yr−1, and clastic rock is 500 t · ha · yr−1. (2) After the correction of the soil loss tolerance, the average annual amount of soil loss in the study area is 3.08 t · ha · yr−1, which is 41.12 % of the model. The predicted value of soil erosion is nearly the same as the observed value after modification. (3) It is necessary to reconsider the risk assessment model of soil erosion applicable to karst areas. This paper proposes an idea to estimate soil erosion based on the allowable loss of soil, which is more scientifically and accurately to reflect the soil erosion status of the study area compared with the traditional way. This study provides a corresponding reference for the formulation of soil and water conservation policies in China and the world's karst regions.

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Spatiotemporal evolution of carbon sequestration of limestone weathering in China

Wang

Bai

et al. 2019

Sci. China Earth Sci.

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Spatiotemporal distribution and national measurement of the global carbonate carbon sink

Cited by 51 publications

References 41 publications

Change Detection of Soil Formation Rate in Space and Time Based on Multi Source Data and Geospatial Analysis Techniques

Change Detection of Soil Formation Rate in Space and Time Based on Multi Source Data and Geospatial Analysis Techniques

Estimation of soil erosion considering soil loss tolerance in karst area

Spatiotemporal evolution of carbon sequestration of limestone weathering in China

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