The DOI matches its Crossref record; 51 of the 51 references it cites were found in a registry or an index.
Potential carbon release from permafrost soils of Northeastern Siberia
Abstract
Permafrost soils are an important reservoir of carbon (C) in boreal and arctic ecosystems. Rising global temperature is expected to enhance decomposition of organic matter frozen in permafrost, and may cause positive feedback to warming as CO 2 is released to the atmosphere. Significant amounts of organic matter remain frozen in thick mineral soil (loess) deposits in northeastern Siberia, but the quantity and lability of this deep organic C is poorly known. Soils from four tundra and boreal forest locations in northeastern Siberia that have been continuously frozen since the Pleistocene were incubated at controlled temperatures (5, 10 and 15°C) to determine their potential to release C to the atmosphere when thawed. Across all sites, CO 2 with radiocarbon (14 C) ages ranging between∼21 and 24 ka bp was respired when these permafrost soils were thawed. The amount of C released in the first several months was strongly correlated to C concentration in the bulk soil in the different sites, and this correlation remained the same for fluxes up to 1 year later. Fluxes were initially strongly related to temperature with a mean Q10 value of 1.9±0.3 across all sites, and later were unrelated to temperature but still correlated with bulk soil C concentration. Modeled inversions of Δ 14 CO 2 values in respiration CO 2 and soil C components revealed mean contribution of 70% and 26% from dissolved organic C to respiration CO 2 in case of two permafrost soils, while organic matter fragments dominated respiration (mean 68%) from a surface mineral soil that served as modern reference sample. Our results suggest that if 10% of the total Siberian permafrost C pool was thawed to a temperature of 5°C, about 1 Pg C will be initially released from labile C pools, followed by respiration of∼40 Pg C to the atmosphere over a period of four decades.
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Cites
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Vulnerability of Permafrost Carbon to Climate Change: Implications for the Global Carbon Cycle
Schuur, E. A. G., Bockheim, J., Canadell, J. G., Euskirchen, E., Field, C. B., Goryachkin, S. V., Hagemann, S., Kuhry, P., Lafleur, P. M., Lee, H., et al. (2008) · BioScience · doi:10.1641/b580807 · Cited by 1,642
Self-citationThe effect of permafrost thaw on old carbon release and net carbon exchange from tundra
Schuur, E. A. G., Vogel, J. G., Crummer, K. G., Lee, H., Sickman, J. O., & Osterkamp, T. E. (2009) · Nature · doi:10.1038/nature08031 · Cited by 1,114
Self-citationHigh biolability of ancient permafrost carbon upon thaw
Vonk, J. E., Mann, P. J., Davydov, S., Davydova, A., Spencer, R. G. M., Schade, J., Sobczak, W. V., Zimov, N., Zimov, S., Bulygina, E., et al. (2013) · Geophysical Research Letters · doi:10.1002/grl.50348 · Cited by 320
Self-citationFeedbacks of Terrestrial Ecosystems to Climate Change
Field, C. B., Lobell, D. B., Peters, H. A., & Chiariello, N. R. (2007) · Annual Review of Environment and Resources · doi:10.1146/annurev.energy.32.053006.141119 · Cited by 317
The status and stability of permafrost carbon on the Tibetan Plateau
Mu, C., Abbott, B. W., Norris, A. J., Mu, M., Fan, C., Chen, X., Jia, L., Yang, R., Zhang, T., Wang, K., et al. (2020) · Earth-Science Reviews · doi:10.1016/j.earscirev.2020.103433 · Cited by 312
Metadata
- Authors
- DUTTA, K., SCHUUR, E. A. G., NEFF, J. C., & ZIMOV, S. A.
- Venue
- Global Change Biology
- Publisher
- Wiley
- Published
- 2006-10-20
- Volume
- 12
- Issue
- 12
- Pages
- 2336-2351
- ISSN
- 1354-1013 (ISSN-L)
- 1365-2486
- OpenAlex
- W2130457878
- Cited by
- 417
- References
- 51
- FWCI
- 6.75
- Type
- journal article
- Language
- en
- Open access
- closed
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