| Forms and functions of inorganic carbon in the Jiaozhou Bay sediments |
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| 作者姓名： | LI Xuegang SONG Jinming YUAN Huamao LI Ning |
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| 作者单位： | Institute of Oceanology, Chinese Academy of Science, Qingdao 266071, China |
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| 基金项目： | SOA under contract No. MASEG200606，Creative Research Groups by NSFC under contract No.40821004，the National Key Project for Basic Research of China under contract No. 2007CB407305，the "100 Talents Project" of the Chinese Academy of Sciences |
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| 摘 要： | Inorganic carbon forms and their influencing factors, mutual transformation and contribution to carbon cycling in the Jiaozhou Bay sediments were discussed. The results show that inorganic carbon in sediments could be divided into five forms:NaCl form, NH3·H2O form, NaOH form, NH2OH·HCl form and HCl form. Thereinto, NH2OH·HCl form and HCl form account for more than 70% of total inorganic carbon. There was close relationship among every form of inorganic carbon and their correlativity was clearly different with different sedimentary environment except the similar strong positive correlation among NH2OH·HCl form, HCl form and total inorganic carbon in all regions of the Jiaozhou Bay. All forms of inorganic carbon were influenced by organic carbon, pH, Eh, Es, nitrogen and phosphorus in sediments, but their influence had different characteristics in different regions. Every form of inorganic carbon transformed into each other continuously during early diagenesis of sediments and the common phenomenon was that NaCl form, NH3·H2O form, NaOH form and NH2OH·HCl form might transform into steady HCl form. NaCl form, NH3·H2O form, NaOH form and NH2OH·HCl form could participate in carbon recycle and they are potential carbon source; HCl form may be buried for a long time in sediments, and it may be one of the final resting places of atmospheric CO2. Inorganic carbon which entered into sediments was about 4.98×1010 g in the Jiaozhou Bay every year, in which about 1.47×1010 g of inorganic carbon might be buried for a long time and about 3.51×1010 g of inorganic carbon might return into seawater and take part in carbon recycling.
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| 关 键 词： | 无机碳 沉积物 胶州湾 |
| 收稿时间： | 2008/11/25 0:00:00 |
| 修稿时间： | 7/9/2009 12:00:00 AM |
Forms and functions of inorganic carbon in the Jiaozhou Bay sediments |
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| LI Xuegang,SONG Jinming,YUAN Huamao,LI Ning.Forms and functions of inorganic carbon in the Jiaozhou Bay sediments[J].Acta Oceanologica Sinica,2009,28(6):30-41. |
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| Authors: | LI Xuegang SONG Jinming YUAN Huamao and LI Ning |
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| Institution: | Institute of Oceanology, Chinese Academy of Science, Qingdao 266071, China |
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| Abstract: | Inorganic carbon forms and their influencing factors, mutual transformation and contribution to carbon cycling in the Jiaozhou Bay sediments were discussed. The results show that inorganic carbon in sediments could be divided into five forms: NaCl form, NH_3·H_2O form, NaOH form,NH_2OH·HCl form and HCl form. Thereinto, NH_2OH·HCl form and HCl form account for more than 70% of total inorganic carbon. There was close relationship among every form of inorganic carbon and their correlativity was clearly different with different sedimentary environment except the similar strong positive correlation among NH_2OH·HCl form, HCl form and total inorganic carbon in all regions of the Jiaozhou Bay. All forms of inorganic carbon were influenced by organic carbon,pH, Eh, Es, nitrogen and phosphorus in sediments, but their influence had different characteristics in different regions. Every form of inorganic carbon transformed into each other continuously during early diagenesis of sediments and the common phenomenon was that NaCl form, NH_3·H_2O form,NaOH form and NH_2OH·HCl form might transform into steady HCl form. NaCl form, NH_3·H_2O form, NaOH form and NH_2OH·HCl form could participate in carbon recycle and they are potential carbon source; HCl form may be buried for a long time in sediments, and it may be one of the final resting places of atmospheric CO_2. Inorganic carbon which entered into sediments was about 4.98x 10~(10) g in the Jiaozhou Bay every year, in which about 1.47x 10~(10) g of inorganic carbon might be buried for a long time and about 3.51x10~(10) g of inorganic carbon might return into seawater and take part in carbon recycling. |
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| Keywords: | different forms of inorganic carbon marine carbon cycling the Jiaozhou Bay sediments |
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