DOI: 10.1002/gbc.20025
Scopus记录号: 2-s2.0-84880096664
论文题名: Evidence for elevated emissions from high-latitude wetlands contributing to high atmospheric CH4 concentration in the early Holocene
作者: Yu Z ; , Loisel J ; , Turetsky M ; R ; , Cai S ; , Zhao Y ; , Frolking S ; , MacDonald G ; M ; , Bubier J ; L
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2013
卷: 27, 期: 1 起始页码: 131
结束页码: 140
语种: 英语
英文关键词: carbon cycle
; ecosystem succession
; Holocene
; methane dynamics
; peatlands
; wetlands
Scopus关键词: Atmospheric methanes
; Carbon cycles
; Dominant contributions
; Ecosystem successions
; Glacial interglacial transition
; High-latitude regions
; Holocenes
; Peat land
; Atmospheric chemistry
; Carbon
; Methane
; Peat
; Wetlands
; carbon cycle
; concentration (composition)
; data set
; deglaciation
; glacial-interglacial cycle
; Holocene
; methane
; paleoatmosphere
; peatland
; primary production
; succession
; Alaska
; United States
英文摘要: The major increase in atmospheric methane (CH4) concentration during the last glacial-interglacial transition provides a useful example for understanding the interactions and feedbacks among Earth's climate, biosphere carbon cycling, and atmospheric chemistry. However, the causes of CH4 doubling during the last deglaciation are still uncertain and debated. Although the ice-core data consistently suggest a dominant contribution from northern high-latitude wetlands in the early Holocene, identifying the actual sources from the ground-based data has been elusive. Here we present data syntheses and a case study from Alaska to demonstrate the importance of northern wetlands in contributing to high atmospheric CH4 concentration in the early Holocene. Our data indicate that new peatland formation as well as peat accumulation in northern high-latitude regions increased more than threefold in the early Holocene in response to climate warming and the availability of new habitat as a result of deglaciation. Furthermore, we show that marshes and wet fens that represent early stages of wetland succession were likely more widespread in the early Holocene. These wetlands are associated with high CH4 emissions due to high primary productivity and the presence of emergent plant species that facilitate CH4 transport to the atmosphere. We argue that early wetland succession and rapid peat accumulation and expansion (not simply initiation) contributed to high CH4 emissions from northern regions, potentially contributing to the sharp rise in atmospheric CH4 at the onset of the Holocene. ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77603
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Earth and Environmental Sciences, Lehigh University, 1 West Packer Avenue, Bethlehem, PA 18015-3001, United States; Department of Integrative Biology, University of Guelph, Guelph, ON, Canada; Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China; Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH, United States; UCLA Institute of the Environment and Sustainability, Department of Geography, UCLA, Los Angeles, CA, United States; Environmental Studies Department, Mount Holyoke College, South Hadley, MA, United States
Recommended Citation:
Yu Z,, Loisel J,, Turetsky M,et al. Evidence for elevated emissions from high-latitude wetlands contributing to high atmospheric CH4 concentration in the early Holocene[J]. Global Biogeochemical Cycles,2013-01-01,27(1)