A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Methyl bromide and methyl chloride fluxes from temperate forest litter
Abstract Methyl halide fluxes were measured from fine (nonwoody) litter samples at a temperate deciduous forest site in Scotland on 16 occasions over more than a year and at a coniferous forest site. The resulting mean (±1 sd) CH3Br and CH3Cl fluxes were 4.1 ± 3.7 ng kg−1 h−1 and 0.98 ± 0.62 μg kg−1 h−1, respectively, for dry mass leaf litter and 5.7 ± 6.3 ng kg−1 h−1 and 0.47 ± 0.14 μg kg−1 h−1 for dry mass needle litter. Temporal variations of net fluxes from leaf litter were significantly greater than spatial variations suggesting seasonality in the fluxes. The mean CH3Cl/CH3Br mass ratio of fluxes was ∼200 (to 1 sig. fig.), an order of magnitude larger than the ratio of their estimated global turnovers. Temperate forest litter may be a moderate net source of CH3Cl globally but a negligible source of CH3Br. These statements refer to the nonwoody litter component only.
Research highlights ► Methyl halide fluxes were measured from forest non-woody litter samples in Scotland. ► At a single site, temporal variations in fluxes were significantly greater than spatial variations. ► Findings indicate temperate forest litter may be moderate source for CH3Cl globally but negligible for CH3Br.
Methyl bromide and methyl chloride fluxes from temperate forest litter
Abstract Methyl halide fluxes were measured from fine (nonwoody) litter samples at a temperate deciduous forest site in Scotland on 16 occasions over more than a year and at a coniferous forest site. The resulting mean (±1 sd) CH3Br and CH3Cl fluxes were 4.1 ± 3.7 ng kg−1 h−1 and 0.98 ± 0.62 μg kg−1 h−1, respectively, for dry mass leaf litter and 5.7 ± 6.3 ng kg−1 h−1 and 0.47 ± 0.14 μg kg−1 h−1 for dry mass needle litter. Temporal variations of net fluxes from leaf litter were significantly greater than spatial variations suggesting seasonality in the fluxes. The mean CH3Cl/CH3Br mass ratio of fluxes was ∼200 (to 1 sig. fig.), an order of magnitude larger than the ratio of their estimated global turnovers. Temperate forest litter may be a moderate net source of CH3Cl globally but a negligible source of CH3Br. These statements refer to the nonwoody litter component only.
Research highlights ► Methyl halide fluxes were measured from forest non-woody litter samples in Scotland. ► At a single site, temporal variations in fluxes were significantly greater than spatial variations. ► Findings indicate temperate forest litter may be moderate source for CH3Cl globally but negligible for CH3Br.
Methyl bromide and methyl chloride fluxes from temperate forest litter
Blei, Emanuel (author) / Heal, Mathew R. (author)
Atmospheric Environment ; 45 ; 1543-1547
2010-12-20
5 pages
Article (Journal)
Electronic Resource
English
| Online Contents | 1995
Methyl bromide as extinguishing agent
| Engineering Index Backfile | 1946
Total and methyl mercury concentrations and fluxes from small boreal forest catchments in Finland
| Online Contents | 2003