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Översiktsartikel2019Vetenskapligt granskadÖppen tillgång

Reviews and syntheses: Greenhouse gas exchange data from drained organic forest soils - a review of current approaches and recommendations for future research

Jauhiainen, Jyrki; Alm, Jukka; Bjarnadottir, Brynhildur; Callesen, Ingeborg; Christiansen, Jesper R.; Clarke, Nicholas; Dalsgaard, Lise; He, Hongxing; Jordan, Sabine; Kazanaviciute, Vaiva; Klemedtsson, Leif; Lauren, Ari; Lazdins, Andis; Lehtonen, Aleksi; Lohila, Annalea; Lupikis, Ainars; Mander, Ulo; Minkkinen, Kari; Kasimir, Asa; Olsson, Mats;
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Drained organic forest soils in boreal and temperate climate zones are believed to be significant sources of the greenhouse gases (GHGs) carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O), but the annual fluxes are still highly uncertain. Drained organic soils exemplify systems where many studies are still carried out with relatively small resources, several methodologies and manually operated systems, which further involve different options for the detailed design of the measurement and data analysis protocols for deriving the annual flux. It would be beneficial to set certain guidelines for how to measure and report the data, so that data from individual studies could also be used in synthesis work based on data collation and modelling. Such synthesis work is necessary for deciphering general patterns and trends related to, e.g., site types, climate, and management, and the development of corresponding emission factors, i.e. estimates of the net annual soil GHG emission and removal, which can be used in GHG inventories. Development of specific emission factors also sets prerequisites for the background or environmental data to be reported in individual studies. We argue that wide applicability greatly increases the value of individual studies. An overall objective of this paper is to support future monitoring campaigns in obtaining high-value data. We analysed peer-reviewed publications presenting CO2, CH4 and N2O flux data for drained organic forest soils in boreal and temperate climate zones, focusing on data that have been used, or have the potential to be used, for estimating net annual soil GHG emissions and removals. We evaluated the methods used in data collection and identified major gaps in background or environmental data. Based on these, we formulated recommendations for future research.

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2019, Volym: 16, nummer: 23, sidor: 4687-4703