Climatically driven loss of calcium in steppe soil as a sink for atmospheric carbon

Lapenis, Andrei G.; Lawrence, Gregory B.; Bailey, Scott W.; Апарин, Б. Ф.; Shiklomanov, A. I.; Speranskaya, N. A.; Torn, M. S.; Calef, M. P.

doi:10.1029/2007gb003077

Cited by 27 publications

(16 citation statements)

References 22 publications

(28 reference statements)

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“…The region's subsoils have also lost Ca 2+ , which was present as calcium carbonate over the past 100 years, which has been linked to the trend in increasing precipitation (Lapenis et al, 2008). It is considered likely that calcium is involved in stabilization reactions with BC (Czimczik and Masiello, 2007), and there is circumstantial evidence that the loss of calcium from soil is associated with the loss of BC (Clough and Skjemstad, 2000).…”

Section: K Hammes Et Al: Centennial Black Carbon Turnovermentioning

confidence: 99%

Centennial black carbon turnover observed in a Russian steppe soil

et al. 2008

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Abstract. Black carbon (BC), from incomplete combustion of fuels and biomass, has been considered highly recalcitrant and a substantial sink for carbon dioxide. Recent studies have shown that BC can be degraded in soils. We use two soils with very low spatial variability sampled 100 years apart in a Russian steppe preserve to generate the first wholeprofile estimate of BC stocks and turnover in the field. Quantities of fire residues in soil changed significantly over a century. Black carbon stock was 2.5 kg m −2 , or about 7-10% of total organic C in 1900. With cessation of biomass burning, BC stocks decreased 25% over a century, which translates into a centennial soil BC turnover (293 years best estimate; range 182-541 years), much faster than so-called inert or passive carbon in ecosystem models. The turnover time presented here is for loss by all processes, namely decomposition, leaching, and erosion, although the latter two were probably insignificant in this case. Notably, at both time points, the peak BC stock was below 30 cm, a depth interval, which is not typically accounted for. Also, the quality of the fire residues changed with time, as indicated by the use benzene polycarboxylic acids (BPCA) as molecular markers. The proportions of less-condensed (and thus more easily degradable) BC structures decreased, whereas the highly condensed (and more recalcitrant) BC structures survived unchanged over the 100-year period. Our results show that BC cannot be assumed chemically recalcitrant in all soils, and other explanations for very old soil carbon are needed.

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Section: K Hammes Et Al: Centennial Black Carbon Turnovermentioning

confidence: 99%

Centennial black carbon turnover observed in a Russian steppe soil

et al. 2008

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“…To date, an extensive experimental material has been accumulated in the early literature on the amount of leachable calcium from the soils because of washing (Lapenis, 2008;Youngil et al, 2009;Adomaitis et al, 2013). It was found that the washout intensity depends on the initial calcium content in the soils, the amount of precipitation, the granulometric composition of soils, the dose of the applied ameliorant, the amount of fertilizer used, etc.…”

Section: Introductionmentioning

confidence: 99%

Eluvial losses of Ca from Umbric Albeluvisols Abruptic produced by different doses of lime: Column experiment

Pavlova¹,

Litvinovich²,

Lavrishchev³

et al. 2019

Zemljište i biljka

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Losses of soil calcium due to migration from Umbric Albeluvisols Abruptic soil meliorated by various doses of chalk were studied in column experiment with 16 washings. It has been established that the dynamic of calcium leaching from soil limed with optimal dose (1) and increased dose (2) is of a similar nature. In both treatments in the first 5 and 3 washes, respectively, there was a sharp decrease in the amount of calcium in the soil as described by exponential model. Starting from 6 and 4 washes, respectively, stabilization in Ca losses occurred. It was found that an increase in the chalk dose by 2.7 times increases the leaching of calcium by 4.8 times. It was concluded that an attempt to create in soil a certain reserve of available calcium for plants by increasing the dose of a finely ground ameliorant is ineffective because it increases unproductive losses of calcium. It has been suggested that in the soil there is a buffer system: exchangeable calcium ↔ calcium of soil solution, which even in the conditions of intensive wetting maintains the presence of a certain amount of water-soluble calcium.

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“…In addition, such uptake would not occur in dry soils; thus, the extrapolated amounts are likely much too high. Carbon dioxide associated with carbonate dissolution accounted for an uptake of 2.1 to 7.4 g C m −2 yr −1 in a semi‐arid, Russian cold steppe ecosystem (Lapensis et al , 2008)…”

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confidence: 99%