DOI: 10.1016/j.foreco.2014.03.049
Scopus记录号: 2-s2.0-84899117929
论文题名: Soil CO2 balance and its uncertainty in forestry-drained peatlands in Finland
作者: Ojanen P. ; Lehtonen A. ; Heikkinen J. ; Penttilä T. ; Minkkinen K.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2014
卷: 325 起始页码: 60
结束页码: 73
语种: 英语
英文关键词: Boreal peatland
; Forest inventory
; Forestry drainage
; Uncertainty
; Upscaling
Scopus关键词: Carbon
; Carbon dioxide
; Drainage
; Estimation
; Forestry
; Soils
; Timber
; Wetlands
; Boreal peatlands
; Forest inventory
; Forest inventory data
; Forestry-drained peatlands
; Global carbon cycle
; Relative uncertainty
; Uncertainty
; Upscaling
; Uncertainty analysis
; biogeochemistry
; carbon balance
; carbon dioxide
; carbon flux
; carbon sequestration
; forest ecosystem
; forest inventory
; forest soil
; human activity
; land use change
; litter
; numerical model
; peat soil
; peatland
; soil moisture
; uncertainty analysis
; Carbon Dioxide
; Drainage
; Forestry
; Inventories
; Wetlands
; Finland
英文摘要: To understand the global carbon cycle and the impact of human activity on climate, it is necessary to quantify the net CO2 exchange of ecosystems in different land uses on a large scale. Methods to estimate soil net CO2 exchange (NECO2soil) for drained peatland forests have been largely based on chamber measurements and statistical models. The uncertainty in these methods has not been assessed. Yet, disturbed organic soils are a globally important, potential CO2 source due to their vast carbon storage and its sensitivity to changes in soil moisture.In this study, we estimated the countrywide NECO2soil for the 4.76 million ha of forestry-drained peat soils in Finland. We gathered available litter production and CO2 efflux data and constructed models to be used for the upscaling of NECO2soil from forest inventory data. The contribution of each model and the inventory sampling to the precision of the countrywide estimate was calculated. Also, the sensitivity to possible bias in selected model components was estimated.Compared to the estimated mean NECO2soil, ranging from a source of +20gm-2year-1 of C to a sink of -40gm-2year-1 of C, the uncertainty was high. The precision of the estimate (±1 standard deviation) was ±20gm-2year-1 of C. Due to possible bias in the estimated belowground litter input, the overall uncertainty was much higher, around ±60gm-2year-1 of C.The main reason for the high relative uncertainty was NECO2soil being on average close to zero in these boreal forestry-drained peatlands. Forest inventory sample size was large enough and the data for the models were mainly sufficient. To reduce the uncertainty, better understanding of belowground carbon fluxes in order to accurately determine the C input to soil, is crucial. © 2014 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65931
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: University of Helsinki, Department of Forest Sciences, P.O. Box 27, FI-00014 Helsinki, Finland; Finnish Forest Research Institute, Southern Finland Regional Unit, P.O. Box 18, FI-01301 Vantaa, Finland
Recommended Citation:
Ojanen P.,Lehtonen A.,Heikkinen J.,et al. Soil CO2 balance and its uncertainty in forestry-drained peatlands in Finland[J]. Forest Ecology and Management,2014-01-01,325