Preprints
https://doi.org/10.5194/bg-2021-211
https://doi.org/10.5194/bg-2021-211
17 Aug 2021
 | 17 Aug 2021
Status: this preprint was under review for the journal BG but the revision was not accepted.

Dissolved organic carbon vertical movement and carbon accumulation in West Siberian peatlands

Evgeny A. Zarov, Elena D. Lapshina, Iris Kuhlmann, and Ernst-Detlef Schulze

Abstract. Dissolved organic carbon is an additional path of carbon cycle but there is a lack of information about its distribution in peatland and rates of downward movement. We dated seven peat cores (separately the dissolved (DOC) and particulate (POC) organic carbon) from Mukhrino peatland (typical zonal oligotrophic bog) in western Siberia to assess the date distribution between those two peat fractions. Our results revealed that the DOC is younger than POC for the surface peatland layers (0–150 cm) and older for the deeper layers. The date differences increases with depth and reaches 2000–3000 years at the bottom layer (430–530 cm). In our hypothesis this date discrepancy caused by more young DOC moving to the deeper and older peat layers. The estimated average value of DOC downward movement was 0.047 ± 0.019 cm yr−1.

Th oldest dates found at the lake bottom and ancient riverbed were 10 053 and 10 989 cal yr BP correspondingly. For the whole period of peatland functioning the average peat accumulation rate was estimated as 0.067 ± 0.018 cm yr−1 (0.013–0.332 cm yr−1), the carbon accumulation rate was estimated as 38.56 ± 12.21 g С m−2 yr−1 (28.46–57.91 g С m−2 yr−1).

Evgeny A. Zarov, Elena D. Lapshina, Iris Kuhlmann, and Ernst-Detlef Schulze

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on bg-2021-211', Anonymous Referee #1, 26 Sep 2021
    • AC1: 'Reply on RC1', Evgeny A Zarov, 10 Dec 2021
  • RC2: 'Comment on bg-2021-211', Anonymous Referee #2, 09 Nov 2021
    • AC2: 'Reply on RC2', Evgeny A Zarov, 10 Dec 2021

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on bg-2021-211', Anonymous Referee #1, 26 Sep 2021
    • AC1: 'Reply on RC1', Evgeny A Zarov, 10 Dec 2021
  • RC2: 'Comment on bg-2021-211', Anonymous Referee #2, 09 Nov 2021
    • AC2: 'Reply on RC2', Evgeny A Zarov, 10 Dec 2021
Evgeny A. Zarov, Elena D. Lapshina, Iris Kuhlmann, and Ernst-Detlef Schulze
Evgeny A. Zarov, Elena D. Lapshina, Iris Kuhlmann, and Ernst-Detlef Schulze

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Latest update: 01 Mar 2024
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Short summary
The waterlogging process started ~11 000 years ago at the Mukhrino peatland (Russia, western Siberia). Since that time the peat accumulation has been started with the average rate 0.67 mm per year. The highest carbon accumulation rate found for bottom layers formed by shrubs and tress (63.0–76.0 gC m−2 year−1) and the lowest rate found for the upper layers formed by mosses (34.0 gC m−2 year−1). Dissolved carbon may move downward through the peatland with the average rate 0.047 cm year−1.
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