Effect of temperature on O⊘ reactions and equilibria: A pulse radiolysis study

Elliot, A. John; McCracken, David R.

doi:10.1016/1359-0197(89)90096-9

Cited by 48 publications

(63 citation statements)

References 19 publications

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“…Romanovskaya et al (2001) reported a natural colonization of methylotrophic bacteria on leaves, occurring mainly via air transfer. The degradation of methanol could also be due to the reaction of methanol in the aqueous-phase with OH radicals (Elliot and McCracken, 1989). This chemical reaction might occur in water films present on leaf and soil surfaces.…”

Section: Degradation Processesmentioning

confidence: 99%

Abiotic and biotic control of methanol exchanges in a temperate mixed forest

et al. 2012

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Abstract.Methanol exchanges over a mixed temperate forest in the Belgian Ardennes were measured for more than one vegetation season using disjunct eddy-covariance by a mass scanning technique and Proton Transfer Reaction Mass Spectrometry (PTR-MS). Half-hourly methanol fluxes were measured in the range of −0.6 µg m −2 s −1 to 0.6 µg m −2 s −1 , and net daily methanol fluxes were generally negative in summer and autumn and positive in spring. On average, the negative fluxes dominated (i.e. the site behaved as a net sink), in contrast to what had been found in previous studies.An original model describing the adsorption/desorption of methanol in water films present in the forest ecosystem and the methanol degradation process was developed. Its calibration, based on field measurements, predicted a mean methanol degradation rate of −0.0074 µg m −2 s −1 and a half lifetime for methanol in water films of 57.4 h. Biogenic emissions dominated the exchange only in spring, with a standard emission factor of 0.76 µg m −2 s −1 .The great ability of the model to reproduce the long-term evolution, as well as the diurnal variation of the fluxes, suggests that the adsorption/desorption and degradation processes play an important role in the global methanol budget. This result underlines the need to conduct long-term measurements in order to accurately capture these processes and to better estimate methanol fluxes at the ecosystem scale.

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