Details

Autor(en) / Beteiligte

• Alm, J
• Shurpali, N J
• Minkkinen, K
• Aro, L
• Hytoenen, J
• Laurila, T
• Lohila, A
• Maljanen, M
• Martikainen, P J
• Maekiranta, P
• Penttilae, T
• Saarnio, S
• Silvan, N
• Tuittila, E-S
• Laine, J
• Laiho, R

Titel

Emission factors and their uncertainty for the exchange of CO sub(2), CH sub(4) and N sub(2)O in Finnish managed peatlands

Ist Teil von

• Boreal environment research, 2007-01, Vol.12 (2), p.191-209

Erscheinungsjahr

2007

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• This paper summarises the results of several research groups participating in the research programme "Greenhouse Impacts of the use of Peat and Peatlands in Finland", and presents emission factors for peat-atmosphere fluxes of CO sub(2), CH sub(4), and N sub(2)O, filling gaps in knowledge concerning the afforestation of organic croplands and cutaways, and improves the emission assessment of peatlands drained for forestry. Forest drainage may result in net binding of soil carbon or net release, depending on site characteristics and the tree stand. Use of peatlands for agriculture (48-4821g CO sub(2)-eq. m super(-2) a super(-1)), even after the cultivation has ceased, or for milled peat harvesting (1948-2478g CO sub(2)-eq. m super(-2) a super(1)) can cause the highest overall emissions. Extremely high CO sub(2) emissions are possible from peat harvesting areas during wet and warm summers. Afforestation of those peatlands abandoned from cultivation or peat harvesting can reduce the warming impact at least during the first tree generation. Heterotrophic soil respiration may have a systematic south-north difference in temperature response. More data must be collected before the information on peatland forest soil CO sub(2) emissions can be adapted for different climatic regions in Finland. A test of the model DNDC against measured data showed that DNDC has to be developed further before it can be used in estimating N sub(2)O emissions from boreal peatlands.