Monoterpene emission rate measurements from a Monterey pine
- Univ. of Kuopio (Finland)
- Univ. of California, Riverside (United States)
The monoterpenes emitted from a Monterey pine (pinus radiata) were investigated using a dynamic flow-through enclosure technique. The monoterpenes identified and quantified were {alpha}- and {beta}-pinene, d-limonene + {beta} phellandrene, myrcene, camphene and {Delta}{sup 3}-carene, with {alpha}- and {beta}-pinene accounting for over 80% of the total monoterpene emissions. The monoterpene emission rate increased with temperature, in good agreement with previous data for other coniferous species. The absence of added CO{sub 2} to the synthetic air flow stream, exposure to elevated levels (300-500 ppb mixing ratio) of O{sub 3} for 3-4 hours, and increased air movement within the enclosure, had no observable effect on the monoterpene emission rate at a given temperature. In contrast, rough handling of the pine during the sampling protocol resulted in increases in the monoterpene emission rate by factors of 10-50. These results will be useful to those designing enclosure sampling protocols for the determination of the emission rates of biogenic organic compounds from vegetation.
- OSTI ID:
- 5042359
- Journal Information:
- Journal of Geophysical Research; (United States), Journal Name: Journal of Geophysical Research; (United States) Vol. 95:D6; ISSN 0148-0227; ISSN JGREA
- Country of Publication:
- United States
- Language:
- English
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540110*
540210 -- Environment
Terrestrial-- Basic Studies-- (1990-)
AIR FLOW
AIR SAMPLERS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL COMPOSITION
CONIFERS
DEGASSING
DESIGN
EMISSION
EQUIPMENT
FLUID FLOW
GAS FLOW
MEASURING METHODS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
OZONE
PINES
PINOPHYTA
PLANTS
SAMPLE PREPARATION
SAMPLERS
SAMPLING
TEMPERATURE DEPENDENCE
TERPENES
TREES