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  Dynamics of soil organic carbon in the steppes of Russia and Kazakhstan under past and future climate and land use

Rolinski, S., Prishchepov, A. V., Guggenberger, G., Bischoff, N., Kurganova, I., Schierhorn, F., Müller, D., Müller, C. (2021): Dynamics of soil organic carbon in the steppes of Russia and Kazakhstan under past and future climate and land use. - Regional Environmental Change, 21, 3, 73.
https://doi.org/10.1007/s10113-021-01799-7

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 Urheber:
Rolinski, Susanne1, Autor              
Prishchepov, Alexander V.2, Autor
Guggenberger, Georg2, Autor
Bischoff, Norbert2, Autor
Kurganova, Irina2, Autor
Schierhorn, Florian2, Autor
Müller, Daniel2, Autor
Müller, Christoph1, Autor              
Affiliations:
1Potsdam Institute for Climate Impact Research, Potsdam, ou_persistent13              
2External Organizations, ou_persistent22              

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 Zusammenfassung: Changes in land use and climate are the main drivers of change in soil organic matter contents. We investigated the impact of the largest policy-induced land conversion to arable land, the Virgin Lands Campaign (VLC), from 1954 to 1963, of the massive cropland abandonment after 1990 and of climate change on soil organic carbon (SOC) stocks in steppes of Russia and Kazakhstan. We simulated carbon budgets from the pre-VLC period (1900) until 2100 using a dynamic vegetation model to assess the impacts of observed land-use change as well as future climate and land-use change scenarios. The simulations suggest for the entire VLC region (266 million hectares) that the historic cropland expansion resulted in emissions of 1.6⋅ 1015 g (= 1.6 Pg) carbon between 1950 and 1965 compared to 0.6 Pg in a scenario without the expansion. From 1990 to 2100, climate change alone is projected to cause emissions of about 1.8 (± 1.1) Pg carbon. Hypothetical recultivation of the cropland that has been abandoned after the fall of the Soviet Union until 2050 may cause emissions of 3.5 (± 0.9) Pg carbon until 2100, whereas the abandonment of all cropland until 2050 would lead to sequestration of 1.8 (± 1.2) Pg carbon. For the climate scenarios based on SRES (Special Report on Emission Scenarios) emission pathways, SOC declined only moderately for constant land use but substantially with further cropland expansion. The variation of SOC in response to the climate scenarios was smaller than that in response to the land-use scenarios. This suggests that the effects of land-use change on SOC dynamics may become as relevant as those of future climate change in the Eurasian steppes.

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 Datum: 2021-06-012021-07-102021-07-10
 Publikationsstatus: Final veröffentlicht
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 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1007/s10113-021-01799-7
MDB-ID: yes - 3288
PIKDOMAIN: RD2 - Climate Resilience
Organisational keyword: RD2 - Climate Resilience
Working Group: Land Use and Resilience
OATYPE: Hybrid - DEAL Springer Nature
 Art des Abschluß: -

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Titel: Regional Environmental Change
Genre der Quelle: Zeitschrift, SCI, Scopus, p3
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Seiten: - Band / Heft: 21 (3) Artikelnummer: 73 Start- / Endseite: - Identifikator: CoNE: https://publications.pik-potsdam.de/cone/journals/resource/journals425
Publisher: Springer