Unveiling the temporal variability of gas transfer coefficients of streams based on high-frequency dissolved oxygen measurements
文献类型：期刊论文
| 作者 | Wang, Fang; Tian, Siyu2; Yan, Weijin |
| 刊名 | ENVIRONMENTAL RESEARCH
 |
| 出版日期 | 2024-12-01 |
| 卷号 | 262页码:119939 |
| 关键词 | Gas transfer coefficient MCMC Dynamic Dissolved oxygen Stream and river |
| DOI | 10.1016/j.envres.2024.119939 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | Greenhouse gas (GHG) emissions from streams and rivers are important sources of global GHG emissions. As a crucial parameter for estimating GHG emissions, the gas transfer coefficient (expressed as K-600 at water temperature of 20 degrees C) has uncertainties. This study proposed a new approach for estimating K-600 based on high-frequency dissolved oxygen (DO) data and an ecosystem metabolism model. This approach combines the numerical solution method with the Markov Chain Monte Carlo analysis. This study was conducted in the Chaohu Lake watershed in Southeastern China, using high-frequency data collected from six streams from 2021 to 2023. This study found: (1) The numerical solution of K-600 demonstrated distinct dynamic variability for all streams, ranging from 0 to 111.39 cm h(-1) (2) Streams with higher discharge (>10 m(3) s(-1)) exhibited significant seasonal differences in K-600 values. The monthly average discharge and water temperature were the two factors that determined the variation in K-600 values. (3) K-600 was a major source of uncertainty in CO2 emission fluxes, with a relative contribution of 53.72%. An integrated K-600 model of riverine gas exchange was developed at the watershed scale and validated using the observed DO change. Our study stressed that K-600 dynamics can better represent areal change to reduce uncertainty in estimating GHG emissions. |
| WOS关键词 | CARBON-DIOXIDE ; TRANSFER VELOCITY ; NITROUS-OXIDE ; EXCHANGE ; RIVERS ; FLUX ; LAKE ; EMISSIONS ; WATER ; TRANSPORT |
| WOS研究方向 | Environmental Sciences & Ecology ; Public, Environmental & Occupational Health |
| WOS记录号 | WOS:001319158700001 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/207930]  |
| 专题 | 陆地表层格局与模拟院重点实验室_外文论文 |
| 通讯作者 | Wang, Fang; Yan, Weijin |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Key Lab Land Surface Pattern & Simulat, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Fang,Tian, Siyu,Yan, Weijin. Unveiling the temporal variability of gas transfer coefficients of streams based on high-frequency dissolved oxygen measurements[J]. ENVIRONMENTAL RESEARCH,2024,262:119939. |
| APA | Wang, Fang,Tian, Siyu,&Yan, Weijin.(2024).Unveiling the temporal variability of gas transfer coefficients of streams based on high-frequency dissolved oxygen measurements.ENVIRONMENTAL RESEARCH,262,119939. |
| MLA | Wang, Fang,et al."Unveiling the temporal variability of gas transfer coefficients of streams based on high-frequency dissolved oxygen measurements".ENVIRONMENTAL RESEARCH 262(2024):119939. |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。