Abiotic CO<sub>2</sub> uptake from the atmosphere by semiarid desert soil and its partitioning into soil phases

DOI Web Site Web Site 被引用文献1件
  • Jiabin Liu
    Yanchi Research Station, School of Soil and Water Conservation Beijing Forestry University Beijing China
  • Keyu Fa
    Yanchi Research Station, School of Soil and Water Conservation Beijing Forestry University Beijing China
  • Yuqing Zhang
    Yanchi Research Station, School of Soil and Water Conservation Beijing Forestry University Beijing China
  • Bin Wu
    Yanchi Research Station, School of Soil and Water Conservation Beijing Forestry University Beijing China
  • Shugao Qin
    Yanchi Research Station, School of Soil and Water Conservation Beijing Forestry University Beijing China
  • Xin Jia
    Yanchi Research Station, School of Soil and Water Conservation Beijing Forestry University Beijing China

書誌事項

公開日
2015-07-21
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1002/2015gl064689
公開者
American Geophysical Union (AGU)

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説明

<jats:title>Abstract</jats:title><jats:p>Deserts may show strong downward CO<jats:sub>2</jats:sub> fluxes and thus could be a significant carbon sink. However, this hypothesis has been strongly challenged because of the failure to determine both the reliability of flux measurements and the exact location of fixed carbon. In this study, we added <jats:sup>13</jats:sup>CO<jats:sub>2</jats:sub> to natural (unsterilized) soil in the Mu Us Desert in northern China and quantified the partitioning of added <jats:sup>13</jats:sup>CO<jats:sub>2</jats:sub> into soil solid and vapor phases. Results show that natural desert soil absorbed <jats:sup>13</jats:sup>CO<jats:sub>2</jats:sub> at a mean rate of 0.28 g m<jats:sup>−2</jats:sup> d<jats:sup>−1</jats:sup>. Of the absorbed <jats:sup>13</jats:sup>CO<jats:sub>2</jats:sub>, 7.1% was released over a 48 h period after <jats:sup>13</jats:sup>CO<jats:sub>2</jats:sub> feeding, 72.8% was stored in the soil solid phase, 0.0007% was found in the vapor phase, while 20.0% of the absorbed <jats:sup>13</jats:sup>CO<jats:sub>2</jats:sub> was undetected. These results indicate that undisturbed desert soils can absorb CO<jats:sub>2</jats:sub> from the atmosphere, with the majority of fixed carbon conserved in the soil solid phase.</jats:p>

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