Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016WR019720 |
Methane emission through ebullition from an estuarine mudflat: 2. Field observations and modeling of occurrence probability | |
Chen, Xi1,2; Schafer, Karina V. R.3; Slater, Lee1 | |
2017-08-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:8 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Peoples R China |
英文摘要 | Ebullition can transport methane (CH4) at a much faster rate than other pathways, albeit over limited time and area, in wetland soils and sediments. However, field observations present large uncertainties in ebullition occurrences and statistic models are needed to describe the function relationship between probability of ebullition occurrence and water level changes. A flow-through chamber was designed and installed in a mudflat of an estuarine temperate marsh. Episodic increases in CH4 concentration signaling ebullition events were observed during ebbing tides (15 events over 456 ebbing tides) and occasionally during flooding tides (4 events over 455 flooding tides). Ebullition occurrence functions were defined using logistic regression as the relative initial and end water levels, as well as tidal amplitudes were found to be the key functional variables related to ebullition events. Ebullition of methane was restricted by a surface frozen layer during winter; melting of this layer during spring thaw caused increases in CH4 concentration, with ebullition fluxes similar to those associated with large fluctuations in water level around spring tides. Our findings suggest that initial and end relative water levels, in addition to tidal amplitude, partly regulate ebullition events in tidal wetlands, modulated by the lunar cycle, storage of gas bubbles at different depths and seasonal changes in the surface frozen layer. Maximum tidal strength over a few days, rather than hourly water level, may be more closely associated with the possibility of ebullition occurrence as it represents a trade-off time scale in between hourly and lunar periods. |
英文关键词 | tidal wetlands methane ebullition gas bubbles flow-through chamber modeling of ebullition probability |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000411202000006 |
WOS关键词 | TIDAL FRESH-WATER ; NORTHERN PEATLAND ; SEDIMENTS ; DYNAMICS ; RELEASE ; FLUX ; EXCHANGE ; STORAGE ; MARSH ; SOIL |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/22076 |
专题 | 资源环境科学 |
作者单位 | 1.Rutgers State Univ, Dept Earth & Environm Sci, Newark, NJ 08901 USA; 2.Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Beijing, Peoples R China; 3.Rutgers State Univ, Dept Biol Sci, Newark, NJ USA |
推荐引用方式 GB/T 7714 | Chen, Xi,Schafer, Karina V. R.,Slater, Lee. Methane emission through ebullition from an estuarine mudflat: 2. Field observations and modeling of occurrence probability[J]. WATER RESOURCES RESEARCH,2017,53(8). |
APA | Chen, Xi,Schafer, Karina V. R.,&Slater, Lee.(2017).Methane emission through ebullition from an estuarine mudflat: 2. Field observations and modeling of occurrence probability.WATER RESOURCES RESEARCH,53(8). |
MLA | Chen, Xi,et al."Methane emission through ebullition from an estuarine mudflat: 2. Field observations and modeling of occurrence probability".WATER RESOURCES RESEARCH 53.8(2017). |
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