Sensitivity of soil organic matter decomposition to temperature at different depths in permafrost regions on the northern Qinghai‐ Tibet Plateau
The temperature sensitivity coefficient ( Q 10 ) of soil organic matter decomposition is an important variable for global climate models. Permafrost regions contain large organic carbon pools. A deep core was taken in permafrost from the northern Q inghai‐ T ibet P lateau ( QTP ) and exposed to incr...
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crwiley:10.1111/ejss.12386 2024-06-23T07:56:05+00:00 Sensitivity of soil organic matter decomposition to temperature at different depths in permafrost regions on the northern Qinghai‐ Tibet Plateau Mu, C. Zhang, T. Zhang, X. Cao, B. Peng, X. National Natural Science Foundation of China 2016 http://dx.doi.org/10.1111/ejss.12386 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fejss.12386 http://onlinelibrary.wiley.com/wol1/doi/10.1111/ejss.12386/fullpdf en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor European Journal of Soil Science volume 67, issue 6, page 773-781 ISSN 1351-0754 1365-2389 journal-article 2016 crwiley https://doi.org/10.1111/ejss.12386 2024-06-06T04:23:16Z The temperature sensitivity coefficient ( Q 10 ) of soil organic matter decomposition is an important variable for global climate models. Permafrost regions contain large organic carbon pools. A deep core was taken in permafrost from the northern Q inghai‐ T ibet P lateau ( QTP ) and exposed to increases in temperature below and above 0° C . The production of CO 2 was related to the soil organic carbon ( SOC ) contents and stable carbon isotopes. Smaller values of δ 13 C‐SOC and δ 13 C‐CO 2 showed that the release of CO 2 was primarily from soil with large SOC contents. The sensitivities of soil organic matter ( SOM ) decomposition to temperature near to the permafrost table and in some permafrost layers were larger than those in other layers. In some layers, a temperature increase below 0° C had a greater effect on the decomposition of SOM than one above 0° C . The values of Q 10 in active layers varied from 2.7 to 23.0, with a mean of 8.8. The values of Q 10 were larger in the deeper layers; they varied from 1.6 to 49.4, with a mean of 20.8. This is because the degradation of permafrost is usually associated with an increase in temperature even when the soil is in a frozen state. Our results suggest that the large values of Q 10 at depth under frozen conditions merit more consideration of the response of SOC to climate warming in future research. Highlights The sensitivity to temperature coefficient, Q 10 , is an important property for global climate models. The values of Q 10 for soil organic matter decomposition were also large in deep layers. A temperature increase below 0° C has large effects on Q 10 . The large values of Q 10 at depth under frozen conditions merit more consideration. Article in Journal/Newspaper permafrost Wiley Online Library European Journal of Soil Science 67 6 773 781 |
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Wiley Online Library |
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English |
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The temperature sensitivity coefficient ( Q 10 ) of soil organic matter decomposition is an important variable for global climate models. Permafrost regions contain large organic carbon pools. A deep core was taken in permafrost from the northern Q inghai‐ T ibet P lateau ( QTP ) and exposed to increases in temperature below and above 0° C . The production of CO 2 was related to the soil organic carbon ( SOC ) contents and stable carbon isotopes. Smaller values of δ 13 C‐SOC and δ 13 C‐CO 2 showed that the release of CO 2 was primarily from soil with large SOC contents. The sensitivities of soil organic matter ( SOM ) decomposition to temperature near to the permafrost table and in some permafrost layers were larger than those in other layers. In some layers, a temperature increase below 0° C had a greater effect on the decomposition of SOM than one above 0° C . The values of Q 10 in active layers varied from 2.7 to 23.0, with a mean of 8.8. The values of Q 10 were larger in the deeper layers; they varied from 1.6 to 49.4, with a mean of 20.8. This is because the degradation of permafrost is usually associated with an increase in temperature even when the soil is in a frozen state. Our results suggest that the large values of Q 10 at depth under frozen conditions merit more consideration of the response of SOC to climate warming in future research. Highlights The sensitivity to temperature coefficient, Q 10 , is an important property for global climate models. The values of Q 10 for soil organic matter decomposition were also large in deep layers. A temperature increase below 0° C has large effects on Q 10 . The large values of Q 10 at depth under frozen conditions merit more consideration. |
author2 |
National Natural Science Foundation of China |
format |
Article in Journal/Newspaper |
author |
Mu, C. Zhang, T. Zhang, X. Cao, B. Peng, X. |
spellingShingle |
Mu, C. Zhang, T. Zhang, X. Cao, B. Peng, X. Sensitivity of soil organic matter decomposition to temperature at different depths in permafrost regions on the northern Qinghai‐ Tibet Plateau |
author_facet |
Mu, C. Zhang, T. Zhang, X. Cao, B. Peng, X. |
author_sort |
Mu, C. |
title |
Sensitivity of soil organic matter decomposition to temperature at different depths in permafrost regions on the northern Qinghai‐ Tibet Plateau |
title_short |
Sensitivity of soil organic matter decomposition to temperature at different depths in permafrost regions on the northern Qinghai‐ Tibet Plateau |
title_full |
Sensitivity of soil organic matter decomposition to temperature at different depths in permafrost regions on the northern Qinghai‐ Tibet Plateau |
title_fullStr |
Sensitivity of soil organic matter decomposition to temperature at different depths in permafrost regions on the northern Qinghai‐ Tibet Plateau |
title_full_unstemmed |
Sensitivity of soil organic matter decomposition to temperature at different depths in permafrost regions on the northern Qinghai‐ Tibet Plateau |
title_sort |
sensitivity of soil organic matter decomposition to temperature at different depths in permafrost regions on the northern qinghai‐ tibet plateau |
publisher |
Wiley |
publishDate |
2016 |
url |
http://dx.doi.org/10.1111/ejss.12386 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fejss.12386 http://onlinelibrary.wiley.com/wol1/doi/10.1111/ejss.12386/fullpdf |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
European Journal of Soil Science volume 67, issue 6, page 773-781 ISSN 1351-0754 1365-2389 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/ejss.12386 |
container_title |
European Journal of Soil Science |
container_volume |
67 |
container_issue |
6 |
container_start_page |
773 |
op_container_end_page |
781 |
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1802648954400145408 |