[1]廖佩琳,高全洲*,李 琦,等.流域源区溪流CO2的来源与扩散过程研究综述[J].山地学报,2020,(4):507-519.[doi:10.16089/j.cnki.1008-2786.000529]
　LIAO Peilin,GAO Quanzhou,*,et al.Review of the Research on Sources and Diffusion Processes of CO2 in Headwater Streams[J].Mountain Research,2020,(4):507-519.[doi:10.16089/j.cnki.1008-2786.000529]
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流域源区溪流CO2的来源与扩散过程研究综述()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2020年第4期
页码:
507-519
栏目:
山地环境
出版日期:
2020-09-27

文章信息/Info

Title:
Review of the Research on Sources and Diffusion Processes of CO2 in Headwater Streams
文章编号:
1008-2786-(2020)4-507-13
作者:
廖佩琳1; 高全洲1; 2; 3*; 李 琦1; 杨茜茜1; 孙渝雯1
1.中山大学 地理科学与规划学院,广东省城市化与地理环境空间模拟重点实验室, 广州 510275; 2.南方海洋科学与工程广东省实验室(珠海),广东 珠海 519080; 3.广东省地质过程与矿产资源探查重点实验室, 广州 510275
Author(s):
LIAO Peilin1; GAO Quanzhou1;  2;  3*; LI Qi1; YANG Qianqian1; SUN Yuwen1
1. Guangdong Key Laboratory for Urbanization and Geo-simulation, School of Geography and Planning, Sun Yat-sen University, Guangzhou 510275, China; 2. Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai), Zhuhai 519080, Guangdong, China; 3. Guangdong Provincial Key Laboratory of Mineral Resources & Geological Processes, Guangzhou 510275, China
关键词:
源区溪流;  地下水;  湍流;  CO2扩散;  碳循环
Keywords:
headwater stream;  groundwater;  turbulence;  CO2 diffusion;  carbon cycle
分类号:
P592
DOI:
10.16089/j.cnki.1008-2786.000529
文献标志码:
A
摘要:
江河水系的源头多由规模小但数量多的溪流构成。溪流是源区生态系统向下游进行碳输出的开端,同时也存在水体CO2向大气扩散的过程。溪流CO2扩散通量(FCO2)取决于水体二氧化碳分压(pCO2)、水-气界面因湍流而产生的CO2扩散速率(kCO2)及溪流水域面积等方面,可以直接测量也可以通过经验公式及模型估算。溪流pCO2受外源输入和内源产生两个过程的制约。外源CO2是由壤中流和地下水向溪流注入的溶解无机碳(DIC)转化而来,内源主要指水体有机质分解产生的CO2。水-气界面kCO2主要受到与河床坡度、粗糙度及流量变化密切相关的水流湍流程度的影响。源区溪流FCO2在时间上表现为暖湿季节>干冷季节、夜间>白天、洪水期>非洪水期; 全球空间尺度呈现自热带向寒温带递减; 特定溪流内自地下水排泄区向下游递减。目前,关于源区溪流CO2来源与扩散的研究逐渐增多,但是在溪流CO2各种内外来源贡献量与贡献比例的估算、源区生态系统中各地理要素对溪流外源碳输入过程的控制、溪流水-气界面FCO2估算模型及山区溪流kCO2和CO2扩散过程等方面还有待深入研究。
Abstract:
The origin of a large river system is mostly composed of small but numerous streams. Headwater streams are not only the beginning of carbon output from terrestrial ecosystems to downstream, but also the hotspots for carbon dioxide(CO2)evasion to atmosphere. The fluxes of CO2 diffusion from streams to atmosphere(FCO2), which depend on CO2 partial pressure(pCO2), gas transfer velocities(kCO2)and area of streams, can be measured directly or estimated by empirical formulas and models. The pCO2 in streams is controlled by both external and internal CO2 sources. External CO2 source is derived from dissolved inorganic carbon(DIC)transported by interflow and groundwater. Internal CO2 source is mainly derived from the decomposition of organic matter in water bodies. The kCO2 is mainly affected by turbulence varying with streambed and discharge. In terms of time, the FCO2 from streams to atmosphere is warm and wet season>dry and cold season, night>day, flood period>non-flood period. Spatially, the FCO2 from streams to atmosphere shows a gradual decline from tropical zone to boreal-arctic zone on global scale and from groundwater seepage area to downstream for specific stream. Until now, researches on sources and diffusion processes of CO2 in headwater streams are gradually increasing, but some aspects should be given more attention, for example, the estimation of contribution rates of various internal and external sources of CO2 in streams, the control of geographical elements on external carbon input process from terrestrial ecosystems to the streams, the estimation model of FCO2 at turbulent streams, and kCO2 and diffusion process of CO2 in the mountain stream.

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备注/Memo

备注/Memo:
收稿日期(Received date):2020-05-03; 改回日期(Accepted date): 2020-07-28
基金项目(Foundation item):国家自然科学基金项目(41871014)。 [National Natural Science Foundation of China( 41871014)]
作者简介(Biography):廖佩琳(1996-),女,广东始兴人,硕士研究生,主要研究方向:河流碳循环与全球变化。 [LIAO Peilin(1996-), female, born in Shixing, Guangdong province, M. Sc. candidate, research on riverine carbon cycle and global change] E-mail: liaoplin@mail2.sysu.edu.cn
*通讯作者(Corresponding author):高全洲(1965-),男,安徽太和人,博士,教授,主要研究方向:河流碳循环与全球变化。 [GAO Quanzhou(1965-), male, born in Taihe, Anhui province, Ph.D., professor, specialized in riverine carbon cycle and global change] E-mail: eesgqz@mail.sysu.edu.cn
更新日期/Last Update: 2020-07-30