Summer drought enhances diurnal amplitude of CO2 in two German rivers of different size
文献类型：期刊论文
| 作者 | Leng, Peifang2,3; Rode, Michael1; Koschorreck, Matthias2 |
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2025-03-01 |
| 卷号 | 271页码:11 |
| 关键词 | Diel CO2 dynamics Stream and river Ecosystem metabolism Droughts Process-based model |
| ISSN号 | 0043-1354 |
| DOI | 10.1016/j.watres.2024.122870 |
| 通讯作者 | Leng, Peifang(lengpeifang@igsnrr.ac.cn) |
| 英文摘要 | Drought is becoming increasingly prevalent globally, stimulating research into its effects on river ecosystems. However, our understanding of how droughts affect riverine CO2 dynamics on a daily scale remains limited, particularly considering the likelihood of future drought occurrence. Here, we seize the opportunity to compare daily CO2 cycles between a non-drought summer and an unprecedented drought summer. We developed a new diel CO2 process model to examine how droughts affect diel change in riverine CO2. Our findings reveal that summer drought amplifies diurnal CO2 fluctuations and the pattern holds true across rivers of varying sizes, with increases of 62% for the stream and 24% for the river during drought conditions. We demonstrate that, in comparison to higher radiation and temperature induced by droughts, diel amplitude is more sensitive to low water depths. A decrease in water depth by 43% and 44% corresponded to 13% and 25% less gas exchange in the studied stream and river, respectively, while decreasing ecosystem respiration by 26% and 57%. Our model effectively captures diel CO2 variations driven by drought considering river size, contributing valuable insights into aquatic ecosystem behavior and refining CO2 emission estimates. We emphasize the vulnerability of shallow rivers to drought, and carbon emissions from shallower waters should be explicitly assessed at sub-daily scales to improve the estimates of daily CO2 emissions. |
| WOS关键词 | GREENHOUSE-GAS EMISSIONS ; ECOSYSTEM METABOLISM ; STREAMS ; TEMPERATURE ; VARIABILITY ; IMPACT ; PCO(2) ; CYCLE |
| 资助项目 | Helmholtz Association in the framework of MOSES (Modular Observation Solutions for Earth Systems) ; CSC-DAAD Joint Fellowship Programme ; Institute's autonomous deployment projects for new recruits[2023000164] |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:001409254300001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | Helmholtz Association in the framework of MOSES (Modular Observation Solutions for Earth Systems) ; CSC-DAAD Joint Fellowship Programme ; Institute's autonomous deployment projects for new recruits |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/213047]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Leng, Peifang |
| 作者单位 | 1.UFZ Helmholtz Ctr Environm Res, Dept Aquat Ecosyst Anal & Management, Brueckstr 3a, D-39114 Magdeburg, Germany 2.UFZ Helmholtz Ctr Environm Res, Dept Lake Res, Bruckstr 3A, D-39114 Magdeburg, Germany 3.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Leng, Peifang,Rode, Michael,Koschorreck, Matthias. Summer drought enhances diurnal amplitude of CO2 in two German rivers of different size[J]. WATER RESEARCH,2025,271:11. |
| APA | Leng, Peifang,Rode, Michael,&Koschorreck, Matthias.(2025).Summer drought enhances diurnal amplitude of CO2 in two German rivers of different size.WATER RESEARCH,271,11. |
| MLA | Leng, Peifang,et al."Summer drought enhances diurnal amplitude of CO2 in two German rivers of different size".WATER RESEARCH 271(2025):11. |
入库方式： OAI收割
来源：地理科学与资源研究所
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