Data for Radiation and temperature drive diurnal variation of aerobic methane emissions from Scots pine canopy

dc.contributor.affiliationUniversity of Eastern Finland - Kohl, Lukas
dc.contributor.affiliationUniversity of Helsinki - Tenhovirta, Salla T. M.
dc.contributor.affiliationUniversity of Helsinki - Koskinen, Markky
dc.contributor.affiliationUniversity of Helsinki - Putkinen, Anuliina
dc.contributor.affiliationUniverstity of Helsinki - Haikarainen, Iikka
dc.contributor.affiliationUniversity of Helsinki - Gelotti, Luka
dc.contributor.affiliationUniversity of Helsinki - Mammarella, Ivan
dc.contributor.affiliationUniversity of Cumbria - Robson, T. Matthew
dc.contributor.affiliationNatural Resources Institute Finland (Luke) - Dominguez Carrasco, M.
dc.contributor.affiliationNatural Resources Institute Finland (Luke) - Adamczyk, B
dc.contributor.affiliationUniversity of Helsinki - Pihlatie, Mari
dc.contributor.authorKohl, Lukas
dc.contributor.authorTenhovirta, Salla T. M.
dc.contributor.authorKoskinen, Markky
dc.contributor.authorPutkinen, Anuliina
dc.contributor.authorHaikarainen, Iikka
dc.contributor.authorGelotti, Luka
dc.contributor.authorMammarella, Ivan
dc.contributor.authorRobson, T. Matthew
dc.contributor.authorDominguez Carrasco, M.
dc.contributor.authorAdamczyk, B
dc.contributor.authorPihlatie, Mari
dc.date.accessioned2025-03-24T15:11:37Z
dc.date.issued2023-06-09
dc.date.issued2023-06-09
dc.descriptionAerobic methane emissions from plant foliage may play an important role in the global methane cycle, but their size and the underlying source processes remain poorly understood. Here, we quantify methane fluxes from the shoots Scots pine trees, a dominant tree species in boreal forests,  identify source processes and environmental drivers, and evaluate the potential of leaf emissions to constrain methane emissions at the ecosystem-level eddy covariance flux measurements. We show that shoot-level measurements conducted in forest, garden, or greenhouse settings; on mature trees and saplings; manually and with an automated CO2 -, temperature-, and water-controlled chamber system; and with multiple methane analysers  all resulted in comparable daytime flux rates  (0.094±0.035 to 0.241±0.090 nmol CH4 g-1 foliar dw h-1). We find that methane emissions from Scots pine shoots exhibit a pronounced diurnal cycle that closely follows photosynthetically active radiation (PAR) and is further modulated by temperature. These diurnal patterns indicate that methane production is associated with diurnal cycle of sunlight, suggesting that methane is either a byproduct of photosynthesis-associated biochemical reactions (e.g. the methionine cycle) or produced through non-enzymatic photochemical reactions in plant biomass. Moreover, we identified a light-dependent component in stand-level methane fluxes, which showed an order-of-magnitude agreement with shoot-level measurements (0.968±0.031 nmol CH4 g-1 h-1), and which provides an upper limit to shoot methane emissions.  
dc.identifierhttps://doi.org/10.5281/zenodo.8027450
dc.identifier.urihttps://hydatakatalogi-test-24.it.helsinki.fi/handle/123456789/9284
dc.rightsOpen
dc.rights.licensecc-by-4.0
dc.subjectAerobic methane production; diurnal cycle; Scots pine
dc.titleData for Radiation and temperature drive diurnal variation of aerobic methane emissions from Scots pine canopy
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