DOI: 10.1007/s10533-017-0394-x
Scopus记录号: 2-s2.0-85032814139
论文题名: Extreme flooding mobilized dissolved organic matter from coastal forested wetlands
作者: Majidzadeh H. ; Uzun H. ; Ruecker A. ; Miller D. ; Vernon J. ; Zhang H. ; Bao S. ; Tsui M.T.K. ; Karanfil T. ; Chow A.T.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 136, 期: 3 起始页码: 293
结束页码: 309
语种: 英语
英文关键词: Dissolved organic carbon
; Hurricane
; Joaquin
; Matthew
; Southeastern US
Scopus关键词: coastal wetland
; discharge
; dissolved organic carbon
; dissolved organic matter
; dissolved organic nitrogen
; extreme event
; flooding
; flushing
; hurricane
; hydrograph
; mobilization
; outflow
; peak discharge
; rainfall
; river basin
; runoff
; spatial analysis
; subsurface flow
; North Carolina
; Pee Dee Basin
; Pee Dee River
; United States
; United States
; Waccamaw River
; Yadkin River
英文摘要: Two intense rainfalls [Hurricane Joaquin (2015) and Hurricane Matthew (2016)], one year apart, provided a unique opportunity to examine changes in dissolved organic matter (DOM) dynamics in coastal blackwater rivers under extreme flooding conditions in the southeastern United States. Two sites along Waccamaw River (a coastal blackwater river) and the outflow of 18 sub-basins of Yadkin-Pee Dee Basin were sampled during and after the flooding events. The peaks of dissolved organic carbon (DOC) and nitrogen (DON) concentrations were observed 18 and 23 days after peak discharge in 2015 and 2016, respectively. Moreover, DOM aromaticity and abundance of humic substances significantly increased during the same period. Separation of discharge hydrograph into surface runoff and subsurface flow suggested that temporal changes were mainly due to contributions from subsurface flow flushing organic matter from wetlands and organic-rich riparian zones. The spatial analysis highlighted the key role of the forested wetlands as the only land use that significantly correlated with both DOM quantity (DOC and DON load) and DOM composition (i.e., aromaticity). The Yadkin-Pee Dee River basin alone exported more than 474 million kg DOC into the ocean during high-flow conditions from the 2016 event, indicating that such extreme short-term events mobilized enormous amounts of organic carbon and nitrogen to the ocean. Considering the predicted increase in frequency and intensity of extreme rainfall events in the eastern U.S., the results of this study can shed light on changes in DOM dynamics that may occur under such conditions in the near future. © 2017, Springer International Publishing AG. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83211
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Biogeochemistry & Environmental Quality Research Group, Clemson University, Baruch Institute of Coastal Ecology & Forest Science, 177 Hobcaw Road, Georgetown, SC, United States; Department of Environmental Engineering and Earth Science, Clemson University, Clemson, SC, United States; Department of Coastal and Marine Systems Science, Coastal Carolina University, Conway, SC, United States; Department of Biology, University of North Carolina at Greensboro, Greensboro, NC, United States; Biogeochemical Processes Department, Max Planck Institute for Biogeochemistry, Jena, Germany
Recommended Citation:
Majidzadeh H.,Uzun H.,Ruecker A.,et al. Extreme flooding mobilized dissolved organic matter from coastal forested wetlands[J]. Biogeochemistry,2017-01-01,136(3)