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Inorganic carbon of sediments in the Yangtze River Estuary and Jiaozhou Bay
Li, XG; Song, JM; Yuan, HA
2006-02-01
Source PublicationBIOGEOCHEMISTRY
ISSN0168-2563
Volume77Issue:2Pages:177-197
SubtypeArticle
AbstractJGOFS results showed that the ocean is a major sink for the increasing atmospheric carbon dioxide resulting from human activity. However, the role of the coastal seas in the global carbon cycling is poorly understood. In the present work, the inorganic carbon (IC) in the Yangtze River Estuary and Jiaozhou Bay are studied as examples of offshore sediments. Sequential extraction was used to divide inorganic carbon in the sediments into five forms, NaCl form, NH(3) H(2)O form, NaOH form, NH(2)OH HCl form and HCl form. Studied of their content and influencing factors were also showed that NaCl form < NH(3) H(2)O form < NaOH form < NH(2)OH HCl form < HCl form, and that their influencing factors of pH, Eh, Es, water content, organic carbon, organic nitrogen, inorganic nitrogen, organic phosphorus and inorganic phosphorus on inorganic carbon can be divided into two groups, and that every factor has different influence on different form or on the same form in different environment. Different IC form may transform into each other in the early diagenetic process of sediment, but NaCl form, NH(3) H(2)O form, NaOH form and NH(2)OH HCl form may convert to HCl form ultimately. So every IC form has different contribution to carbon cycling. This study showed that the contribution of various form of IC to the carbon cycle is in the order of NaOH form > NH(2)OH HCl form > NH(3) H(2)O form > NaCl form > HCl form, and that the contribution of HCl form contributes little to carbon cycling, HCl form may be one of end-result of atmospheric CO(2). So Yangtze River estuary sediment may absorb at least about 40.96x10(11) g atmospheric CO(2) every year, which indicated that offshore sediment play an important role in absorbing atmospheric CO(2).; JGOFS results showed that the ocean is a major sink for the increasing atmospheric carbon dioxide resulting from human activity. However, the role of the coastal seas in the global carbon cycling is poorly understood. In the present work, the inorganic carbon (IC) in the Yangtze River Estuary and Jiaozhou Bay are studied as examples of offshore sediments. Sequential extraction was used to divide inorganic carbon in the sediments into five forms, NaCl form, NH3 H2O form, NaOH form, NH2OH HCl form and HCl form. Studied of their content and influencing factors were also showed that NaCl form < NH3 H2O form < NaOH form < NH2OH HCl form < HCl form, and that their influencing factors of pH, Eh, Es, water content, organic carbon, organic nitrogen, inorganic nitrogen, organic phosphorus and inorganic phosphorus on inorganic carbon can be divided into two groups, and that every factor has different influence on different form or on the same form in different environment. Different IC form may transform into each other in the early diagenetic process of sediment, but NaCl form, NH3 H2O form, NaOH form and NH2OH HCl form may convert to HCl form ultimately. So every IC form has different contribution to carbon cycling. This study showed that the contribution of various form of IC to the carbon cycle is in the order of NaOH form > NH2OH HCl form > NH3 H2O form > NaCl form > HCl form, and that the contribution of HCl form contributes little to carbon cycling, HCl form may be one of end-result of atmospheric CO2. So Yangtze River estuary sediment may absorb at least about 40.96x10(11) g atmospheric CO2 every year, which indicated that offshore sediment play an important role in absorbing atmospheric CO2.
KeywordCarbon Cycling Inorganic Carbon Forms Jiaozhou Bay Yangtze River Estuary Carbon Cycling Inorganic Carbon Forms Jiaozhou Bay Yangtze River Estuary
Subject AreaEnvironmental Sciences ; Geosciences, Multidisciplinary
DOI10.1007/s10533-005-0543-5
URL查看原文
Indexed BySCI
Language英语
WOS IDWOS:000235449500003
Citation statistics
Cited Times:19[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/5436
Collection海洋生态与环境科学重点实验室
AffiliationChinese Acad Sci, Inst Oceanog, Qingdao 266071, Peoples R China
Recommended Citation
GB/T 7714
Li, XG,Song, JM,Yuan, HA. Inorganic carbon of sediments in the Yangtze River Estuary and Jiaozhou Bay[J]. BIOGEOCHEMISTRY,2006,77(2):177-197.
APA Li, XG,Song, JM,&Yuan, HA.(2006).Inorganic carbon of sediments in the Yangtze River Estuary and Jiaozhou Bay.BIOGEOCHEMISTRY,77(2),177-197.
MLA Li, XG,et al."Inorganic carbon of sediments in the Yangtze River Estuary and Jiaozhou Bay".BIOGEOCHEMISTRY 77.2(2006):177-197.
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