DOI: 10.1002/grl.50982
论文题名: Dissolved and particulate organic carbon fluxes from an agricultural watershed during consecutive tropical storms
作者: Caverly E. ; Kaste J.M. ; Hancock G.S. ; Chambers R.M.
刊名: Geophysical Research Letters
ISSN: 0094-8520
EISSN: 1944-8251
出版年: 2013
卷: 40, 期: 19 起始页码: 5147
结束页码: 5152
语种: 英语
英文关键词: agriculture
; carbon
; hurricane
; hydrology
; runoff
Scopus关键词: Agricultural fields
; Agricultural practices
; Agricultural watersheds
; Dissolved organic carbon
; High-resolution measurements
; Organic carbon fluxes
; Particulate organic carbon fluxes
; Ultraviolet absorbance
; Agriculture
; Aromatic compounds
; Carbon
; Hurricanes
; Hydrology
; International trade
; Photoreactivity
; Runoff
; Storms
; Watersheds
; Agricultural runoff
; agricultural practice
; carbon flux
; coastal plain
; dissolved organic carbon
; field
; hurricane
; hydrological regime
; particulate organic carbon
; runoff
; storm track
; tropical cyclone
; watershed
; United States
; Virginia
英文摘要: Low-frequency high-magnitude hydrologic events mobilize a disproportionate amount of dissolved organic carbon (DOC) from watersheds, but few studies measure the role of extreme storms in exporting organic carbon from croplands. We use high-resolution measurements of storm runoff to quantify DOC and particulate organic carbon (POC) fluxes from an agricultural field during consecutive tropical storms that delivered 41 cm of rainfall to the Virginia Coastal Plain. Over a 2 week period, we measured exports of 22 kg DOC ha -1 and 11.3 kg POC ha-1. Ultraviolet absorbance measurements indicate that the aromatic DOC fraction systematically increased as plant-derived aliphatic carbon was depleted during the initial event. Croplands can have event-scale carbon losses that equal or exceed published estimates of annual export for perennial streams draining forested and mixed land use watersheds. We quantify aromatic DOC fractions approaching 50%, indicating that agricultural stormflow can produce a significant load of relatively photoreactive carbon. Key Points Large organic carbon fluxes from croplands during big hydrologic events Agricultural practices facilitate terrestrial carbon transport Photoreactivity of high dissolved carbon loads derived from croplands ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84884999405&doi=10.1002%2fgrl.50982&partnerID=40&md5=99b03be3266d0a3e65d98fdca0fd5bd5
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5784
Appears in Collections: 气候减缓与适应
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作者单位: Geology Department, College of William and Mary, Williamsburg, VA 23187, United States
Recommended Citation:
Caverly E.,Kaste J.M.,Hancock G.S.,et al. Dissolved and particulate organic carbon fluxes from an agricultural watershed during consecutive tropical storms[J]. Geophysical Research Letters,2013-01-01,40(19).