DOI: 10.1002/2014GL062349
论文题名: Switching predominance of organic versus inorganic carbon exports from an intermediate-size subarctic watershed
作者: Dornblaser M.M. ; Striegl R.G.
刊名: Geophysical Research Letters
ISSN: 0094-9052
EISSN: 1944-8783
出版年: 2015
卷: 42, 期: 2 起始页码: 386
结束页码: 394
语种: 英语
英文关键词: dissolved inorganic carbon (DIC)
; dissolved organic carbon (DOC)
; hydrology
; permafrost thaw
; river
; subarctic
Scopus关键词: Carbon
; Dissolution
; Hydrology
; Organic carbon
; Permafrost
; Watersheds
; Discontinuous permafrost
; Dissolved inorganic carbon
; Dissolved organic carbon
; Permafrost thaws
; Small concentration
; subarctic
; Subsurface source
; Water availability
; Rivers
; concentration (composition)
; flow pattern
; hydrological modeling
; infiltration
; permafrost
; river basin
; streamflow
; subsurface flow
; water yield
; watershed
; Yukon Basin
英文摘要: Hydrologic exports of dissolved inorganic and organic carbon (DIC and DOC) reflect permafrost conditions in arctic and subarctic river basins. DIC yields, in particular, increase with decreased permafrost extent. We investigated the influence of permafrost extent on DIC and DOC yield in a tributary of the Yukon River, where the upper watershed has continuous permafrost and the lower watershed has discontinuous permafrost. Our results indicate that DIC versus DOC predominance switches with interannual changes in water availability and flow routing in intermediate-size watersheds having mixed permafrost coverage. Large water yield and small concentrations from mountainous headwaters and small water yield and high concentrations from lowlands produced similar upstream and downstream carbon yields. However, DOC export exceeded DIC export during high flow 2011, whereas DIC predominated during low flow 2010. The majority of exported carbon was derived from near-surface organic sources when landscapes were wet or frozen and from mineralized subsurface sources when infiltration increased. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84923340898&doi=10.1002%2f2014GL062349&partnerID=40&md5=c0b29fa052a39e3c293b9a466f392480
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8668
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: National Research Program, U.S. Geological Survey, Boulder, CO, United States
Recommended Citation:
Dornblaser M.M.,Striegl R.G.. Switching predominance of organic versus inorganic carbon exports from an intermediate-size subarctic watershed[J]. Geophysical Research Letters,2015-01-01,42(2).