| DOI: | 10.1111/gcb.13325
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| 论文题名: | Multiyear greenhouse gas balances at a rewetted temperate peatland |
| 作者: | Wilson D.; Farrell C.A.; Fallon D.; Moser G.; Müller C.; Renou-Wilson F.
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| 刊名: | Global Change Biology
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| 出版年: | 2016
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| 卷: | 22, 期:12 | | 起始页码: | 4080
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| 结束页码: | 4095
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| 语种: | 英语
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| 英文关键词: | carbon dioxide
; climate change mitigation
; interannual variation
; methane
; peat soils
; rewetting
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| Scopus关键词: | annual variation
; carbon dioxide
; carbon sequestration
; climate change
; greenhouse gas
; methane
; peat soil
; peatland
; primary production
; rewetting
; source-sink dynamics
; temperate environment
; carbon dioxide
; gas
; methane
; nitrous oxide
; soil
; water
; analysis
; carbon sequestration
; chemistry
; climate change
; gas
; greenhouse effect
; Ireland
; soil
; wetland
; Carbon Dioxide
; Carbon Sequestration
; Climate Change
; Gases
; Greenhouse Effect
; Ireland
; Methane
; Nitrous Oxide
; Soil
; Water
; Wetlands
|
| 英文摘要: | Drained peat soils are a significant source of greenhouse gas (GHG) emissions to the atmosphere. Rewetting these soils is considered an important climate change mitigation tool to reduce emissions and create suitable conditions for carbon sequestration. Long-term monitoring is essential to capture interannual variations in GHG emissions and associated environmental variables and to reduce the uncertainty linked with GHG emission factor calculations. In this study, we present GHG balances: carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) calculated for a 5-year period at a rewetted industrial cutaway peatland in Ireland (rewetted 7 years prior to the start of the study); and compare the results with an adjacent drained area (2-year data set), and with ten long-term data sets from intact (i.e. undrained) peatlands in temperate and boreal regions. In the rewetted site, CO2 exchange (or net ecosystem exchange (NEE)) was strongly influenced by ecosystem respiration (Reco) rather than gross primary production (GPP). CH4 emissions were related to soil temperature and either water table level or plant biomass. N2O emissions were not detected in either drained or rewetted sites. Rewetting reduced CO2 emissions in unvegetated areas by approximately 50%. When upscaled to the ecosystem level, the emission factors (calculated as 5-year mean of annual balances) for the rewetted site were (±SD) −104 ± 80 g CO2-C m−2 yr−1 (i.e. CO2 sink) and 9 ± 2 g CH4-C m−2 yr−1 (i.e. CH4 source). Nearly a decade after rewetting, the GHG balance (100-year global warming potential) had reduced noticeably (i.e. less warming) in comparison with the drained site but was still higher than comparative intact sites. Our results indicate that rewetted sites may be more sensitive to interannual changes in weather conditions than their more resilient intact counterparts and may switch from an annual CO2 sink to a source if triggered by slightly drier conditions. © 2016 John Wiley & Sons Ltd |
| 资助项目: | Wilson, D.
; Earthy Matters Environmental ConsultantsIreland
; 电子邮件: david.wilson@earthymatters.ie
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/61229
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| Appears in Collections: | 影响、适应和脆弱性
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作者单位: | Earthy Matters Environmental Consultants, Glenvar, Co. Donegal, Ireland; Bord na Móna, Tullamore, Co. Offaly, Ireland; Justus Liebig University Giessen, Ludwigstraße 23, Giessen, Germany; University College Dublin, Belfield, Dublin 4, Ireland
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| Recommended Citation: | |
Wilson D.,Farrell C.A.,Fallon D.,et al. Multiyear greenhouse gas balances at a rewetted temperate peatland[J]. Global Change Biology,2016-01-01,22(12)
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