中国科学院南海海洋研究所机构知识库
Advanced  
SCSIO OpenIR  > 中科院边缘海地质重点实验室  > 期刊论文
学科主题: Environmental Sciences
题名: Dynamics Of CO2 partial pressure and CO2 outgassing in the lower reaches of the Xijiang River, a subtropical monsoon river in China
作者: Yao, GR ; Gao, QZ ; Wang, ZG ; Huang, XK ; He, T ; Zhang, YL ; Jiao, SL ; Ding, J
通讯作者: eesgqz@mail.sysu.edu.cn
关键词: CO2 ; seasonal and spatial variation ; discharge ; outgassing ; The Xijiang River
刊名: SCIENCE OF THE TOTAL ENVIRONMENT
发表日期: 2007
卷: 376, 期:40546, 页:255-266
收录类别: sci
部门归属: Sun Yat Sen Univ, Sch Geog & Planning, Guangzhou 510275, Peoples R China; Chinese Acad Sci, Key Lab Marginal Sea Geol, S China Sea Inst Oceanol, Guangzhou 510301, Peoples R China; Guangxi Reg Hydrol & Water Resources Bur, Wuzhou Branch, Wuzhou 543002, Peoples R China; Hohai Univ, Nanjing 210098, Peoples R China
项目归属: 海洋地质
摘要: The partial pressure of carbon dioxide (pCO(2)) in surface water was surveyed monthly at 6 sampling sites along the entire length of the lower reaches of the Xijiang River, a subtropical monsoon river in China, and at the mouths of its major tributaries, over a whole hydrological year from April 2005 to March 2006, to reveal the seasonal and spatial dynamics of pCO(2). Intensive sampling and measurements were also conducted at Wuzhou gauge station in June and July to investigate the impact of floodwater on pCO(2) and to further explore the relationship between river discharge and pCO(2). The pCO(2) levels were well above atmospheric equilibrium (380 mu atm) during the entire survey period with obvious seasonal and spatial variations, ranging from 600 mu atm to 7200 mu atm for the mainstream and from 700 to 11000 mu atm for tributaries, respectively. The pattern of pCO(2) seasonal variation across 6 sites was almost consistent with each other with little difference. The pCO(2) levels in the dry season were relatively low, with relatively slight temporal and spatial fluctuations that were predominantly controlled by in situ biogenic activities. While the pCO(2) in the wet season greatly varied with river discharge, both annual maximum and minimum pCO(2) levels occurring in this period. The much higher pCO(2) in the early wet season were mainly induced by increasing baseflow and interflow that flushed significant soil CO2 into the streams, whereas the lower pCO(2) observed after floods from July to September, some even lower than pCO(2) levels in the dry season, potentially resulted from in situ plankton blooms. The annual minima pCO(2) levels occurring in this period were caused by the dilution effect of floodwater. There was no obvious downstream trend in pCO(2) variation during the whole survey period, probably a consequence of disturbance from tributaries or spatially distinct channel characteristics and water environments. Based on measurements, we estimate that the water-to-air CO2 flux in the lower reaches of the Xijiang River is about 8.3-15.6 Mg C ha(-1) y(-1). The role of the Xijiang River as a net source of atmospheric CO2 is undoubted. (c) 2007 Elsevier B.V. All rights reserved.
原文出处: 查看原文
WOS记录号: WOS:000245776400023
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/4496
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

Files in This Item: Download All
File Name/ File Size Content Type Version Access License
Dynamics Of CO2 partial pressure and CO2 outgassing in the lower reaches of the Xijiang River, a subtropical monsoon river in China .pdf(474KB)----开放获取--View Download

Recommended Citation:
Yao, GR; Gao, QZ; Wang, ZG; Huang, XK; He, T; Zhang, YL; Jiao, SL; Ding, J.Dynamics Of CO2 partial pressure and CO2 outgassing in the lower reaches of the Xijiang River, a subtropical monsoon river in China,SCIENCE OF THE TOTAL ENVIRONMENT,2007,376(40546):255-266
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Yao, GR]'s Articles
[Gao, QZ]'s Articles
[Wang, ZG]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Yao, GR]‘s Articles
[Gao, QZ]‘s Articles
[Wang, ZG]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
文件名: Dynamics Of CO2 partial pressure and CO2 outgassing in the lower reaches of the Xijiang River, a subtropical monsoon river in China .pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Copyright © 2007-2017  中国科学院南海海洋研究所 - Feedback
Powered by CSpace