Gas transfer velocities of CO2 in subtropical monsoonal climate streams and small rivers
文献类型：期刊论文
| 作者 | Li, Siyue1 ; Mao, Rong1; Ma, Yongmei1; Sarma, Vedula V. S. S.2
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| 刊名 | BIOGEOSCIENCES
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| 出版日期 | 2019-02-04 |
| 卷号 | 16期号:3页码:681-693 |
| ISSN号 | 1726-4170 |
| DOI | 10.5194/bg-16-681-2019 |
| 通讯作者 | Li, Siyue(syli2006@163.com) |
| 英文摘要 | CO2 outgassing from rivers is a critical component for evaluating riverine carbon cycle, but it is poorly quantified largely due to limited measurements and modeling of gas transfer velocity in subtropical streams and rivers. We measured CO2 flux rates and calculated k and partial pressure (pCO(2)) in 60 river networks of the Three Gorges Reservoir (TGR) region, a typical area in the upper Yangtze River with monsoonal climate and mountainous terrain. The determined k(600) (gas transfer velocity normalized to a Schmidt number of 600 (k(600)) at a temperature of 20 degrees C) value (48.4 +/- 53.2 cm h(-1)) showed large variability due to spatial variations in physical processes related to surface water turbulence. Our flux-derived k values using chambers were comparable with k values using the model derived from flow velocities based on a subset of data. Unlike in open waters, e.g., lakes, k(600) is more pertinent to flow velocity and water depth in the studied river systems. Our results show that TGR river networks emitted approx. 0.69 to 0.71 TgCO(2) (1 Tg = 10(12) g) during the monsoon period using varying approaches such as chambers, derived k(600) values and models. This study suggests that incorporating scale-appropriate k measurements into extensive pCO(2) investigations is required to refine basin-wide carbon budgets in subtropical streams and small rivers. We concluded that the simple parameteri-zation of k(600) as a function of morphological characteristics is site specific for regions and watersheds and hence highly variable in rivers of the upper Yangtze. k(600) models should be developed for stream studies to evaluate the contribution of these regions to atmospheric CO2. |
| 资助项目 | Hundred-Talent Program of the Chinese Academy of Sciences[R53A362Z10] ; National Natural Science Foundation of China[31670473] |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000457558000002 |
| 出版者 | COPERNICUS GESELLSCHAFT MBH |
| 源URL | [http://119.78.100.138/handle/2HOD01W0/7376]  |
| 专题 | 生态水文研究中心 |
| 通讯作者 | Li, Siyue |
| 作者单位 | 1.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Res Ctr Ecohydrol, Chongqing 400714, Peoples R China 2.Natl Inst Oceanog, CSIR, Reg Ctr, Visakhapatnam, Andhra Pradesh, India |
| 推荐引用方式 GB/T 7714 | Li, Siyue,Mao, Rong,Ma, Yongmei,et al. Gas transfer velocities of CO2 in subtropical monsoonal climate streams and small rivers[J]. BIOGEOSCIENCES,2019,16(3):681-693. |
| APA | Li, Siyue,Mao, Rong,Ma, Yongmei,&Sarma, Vedula V. S. S..(2019).Gas transfer velocities of CO2 in subtropical monsoonal climate streams and small rivers.BIOGEOSCIENCES,16(3),681-693. |
| MLA | Li, Siyue,et al."Gas transfer velocities of CO2 in subtropical monsoonal climate streams and small rivers".BIOGEOSCIENCES 16.3(2019):681-693. |
入库方式： OAI收割
来源：重庆绿色智能技术研究院
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