| 西江河口段溶解无机碳稳定同位素组成的时空变化 |
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| 引用本文： | 焦树林,陶贞,高全洲,刘昆,佘建伟,丁健,刘祖发.西江河口段溶解无机碳稳定同位素组成的时空变化[J].地理学报(英文版),2008,18(3):363-372. |
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| 作者姓名： | 焦树林 陶贞 高全洲 刘昆 佘建伟 丁健 刘祖发 |
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| 作者单位： | 焦树林,JIAO Shulin(School of Geography and Planning, Sun Yat-sen University, Guangzhou 510275, China;School of Geography and Biology, Guizhou Normal University, Guiyang 550001, China);陶贞,高全洲,刘昆,佘建伟,丁健,刘祖发,TAO Zhen,GAO Quanzhou,LIU Kun,SHE Jianwei,DING Jian,LIU Zufa(School of Geography and Planning, Sun Yat-sen University, Guangzhou 510275, China) |
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| 基金项目： | 国家自然科学基金，广东省自然科学基金，教育部高等学校博士学科点专项科研基金，教育部新世纪优秀人才支持计划 |
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| 摘 要： | 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^13CDIC 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^13CDIC,as the averageδ^13CDIC 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^13CDIC and water temperature（p=0.000;r=-0.569）or betweenδ^13CDIC and oxide-reduction potential（p=0.000;r=0.646）.The striking positive correlation between δ^13CDIC 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^13CDIC 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^13CDIC spatio-temporal variation was closely related to the geographical environment of the Xijiang drainage basin.
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| 关 键 词： | 西江 河口段 溶解无机碳 稳定同位素 时空变化 |
| 收稿时间： | 15 June 2007 |
Stable isotopic composition of riverine dissolved inorganic carbon of the Xijiang River Inner Estuary |
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| Shulin Jiao,Zhen Tao,Quanzhou Gao,Kun Liu,Jianwei She,Jian Ding,Zufa Liu.Stable isotopic composition of riverine dissolved inorganic carbon of the Xijiang River Inner Estuary[J].Journal of Geographical Sciences,2008,18(3):363-372. |
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| Authors: | Shulin Jiao Zhen Tao Quanzhou Gao Kun Liu Jianwei She Jian Ding Zufa Liu |
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| Institution: | 1. School of Geography and Planning, Sun Yat-sen University, Guangzhou 510275, China;School of Geography and Biology, Guizhou Normal University, Guiyang 550001, China
2. School of Geography and Planning, Sun Yat-sen University, Guangzhou 510275, China |
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| Abstract: | 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 the δ13CDIC 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 average δ13CDIC, as the average δ13CDIC in summer (−13.91‰) or autumn (−13.09‰) was much less than those in spring (−11.71‰) or winter (−12.26‰). The riverine δ13CDIC 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 between δ13CDIC and water temperature (p = 0.000; r = −0.569) or between δ13CDIC and oxide-reduction potential (p = 0.000; r = 0.646). The striking positive correlation between δ13CDIC 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 riverine δ13CDIC 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,
the δ13CDIC spatio-temporal variation was closely related to the geographical environment of the Xijiang drainage basin.
Foundation: National Natural Science Foundation of China, No.40671027; No.40471120; Guangdong Provincial Natural Science Foundation,
No.7003669; Specialized Research Fund for the Doctoral Program of Higher Education, No.20040558025; The Program for New Century
Excellent Talents in University
Author: Jiao Shulin (1969–), Ph.D Candidate, specialized in land surface processes of drainage basin and its environmental evolution. |
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| Keywords: | Xijiang River Inner Estuary dissolved inorganic carbon stable isotopic carbon spatio-temporal variation |
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