Abiotic and biotic control of methanol exchanges in a temperate mixed forest
| dc.contributor.author | Laffineur, Q. | |
| dc.contributor.author | Aubinet, M. | |
| dc.contributor.author | Schoon, N. | |
| dc.contributor.author | Amelynck, C. | |
| dc.contributor.author | Muller, J.-F. | |
| dc.contributor.author | Dewulf, J. | |
| dc.contributor.author | Van Langenhove, H. | |
| dc.contributor.author | Steppe, K. | |
| dc.contributor.author | Heinesch, B. | |
| dc.date | 2012 | |
| dc.date.accessioned | 2016-03-29T10:07:36Z | |
| dc.date.available | 2016-03-29T10:07:36Z | |
| dc.identifier.uri | https://orfeo.belnet.be/handle/internal/2990 | |
| dc.description | 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. | |
| dc.language | eng | |
| dc.title | Abiotic and biotic control of methanol exchanges in a temperate mixed forest | |
| dc.type | Article | |
| dc.subject.frascati | Earth and related Environmental sciences | |
| dc.audience | Scientific | |
| dc.subject.free | adsorption | |
| dc.subject.free | biogenic emission | |
| dc.subject.free | biotic factor | |
| dc.subject.free | degradation | |
| dc.subject.free | deposition | |
| dc.subject.free | desorption | |
| dc.subject.free | diurnal variation | |
| dc.subject.free | flux measurement | |
| dc.subject.free | forest ecosystem | |
| dc.subject.free | methanol | |
| dc.subject.free | mixed forest | |
| dc.subject.free | net ecosystem exchange | |
| dc.subject.free | seasonal variation | |
| dc.subject.free | temperate forest | |
| dc.subject.free | Ardennes [Western Europe] | |
| dc.source.title | Atmospheric Chemistry and Physics | |
| dc.source.volume | 12 | |
| dc.source.issue | 1 | |
| dc.source.page | 577-590 | |
| Orfeo.peerreviewed | Yes | |
| dc.identifier.doi | 10.5194/acp-12-577-2012 | |
| dc.identifier.scopus | 2-s2.0-84855959627 |
