Stable isotopic composition of riverine dissolved inorganic carbon of the Xijiang River Inner Estuary
西江河口段溶解无机碳稳定同位素组成的时空变化
查看参考文献25篇
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文摘
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For researching the spatio-temporal variation of the stable isotopic composition of the riverine dissolved inorganic carbon(DIC),we had carried out a survey throughout the hydrologic year during which theδ~(13)C_(DIC) of the surface water and its physicochemical parameter were examined along the Xijiang River Inner Estuarine waterway from September 2006 to June 2007.There was a striking seasonal variation on the averageδ~(13)C_(DIC),as the averageδ~(13)C_(DIC) in summer(-13.91‰)or autumn(-13.09‰)was much less than those in spring(-11.71‰)or winter(-12.26‰).The riverineδ13C DIC was controlled by decomposed condition of the riverine organic matter linking the seasonal variation of the physicochemical parameter in the surface water according to the correlation analysis which indicated notable relations betweenδ~(13)C_(DIC) and water temperature(p=0.000;r=-0.569)or betweenδ~(13)C_(DIC) and oxide-reduction potential(p=0.000;r=0.646).The striking positive correlation between δ~(13)C_(DIC) and the sampling distance happened in the summer rainy season,while striking negative correlation happened in the spring dry season,indicating that river-sea interaction influenced water physicochemical parameters and controlled the riverine DIC property in the survey waterway.In view of the riverineδ~(13)C_(DIC) decreasing for the decomposition of the terrestrial organic matter in the rainy season in summer and increasing for the briny invaded zone extending in the spring dry season along the waterway from the Makou gauging station to the Modaomen outlet,theδ~(13)C_(DIC) spatio-temporal variation was closely related to the geographical environment of the Xijiang drainage basin. |
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来源
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Journal of Geographical Sciences
,2008,18(3):363-372 【核心库】
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DOI
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10.1007/s11442-008-0363-3
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关键词
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Xijiang River Inner Estuary
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dissolved inorganic carbon
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stable isotopic carbon
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spatio-temporal variation
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地址
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School of Geography and Planning;Sun Yat-sen University, Guangzhou, 510275
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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1009-637X |
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学科
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自然地理学 |
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基金
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国家自然科学基金
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广东省自然科学基金
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国家教育部高等学校博士学科点专项科研基金
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国家教育部新世纪优秀人才支持计划
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文献收藏号
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CSCD:3300348
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