Main Title |
Measurement of loblolly pine terpene emissions / |
Other Authors |
|
Publisher |
U.S. Environmental Protection Agency, Environmental Sciences Research Laboratory ; Center for Environmental Research Information [distributor], |
Year Published |
1982 |
Report Number |
EPA/600-S3-82-010 |
OCLC Number |
09495915 |
Subjects |
Terpenes ;
Loblolly pine ;
Air--Pollution--Measurement
|
Internet Access |
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
EJBD |
EPA 600-S3-82-010 |
In Binder |
Headquarters Library/Washington,DC |
11/14/2018 |
ELBD ARCHIVE |
EPA 600-S3-82-010 |
In Binder Received from HQ |
AWBERC Library/Cincinnati,OH |
10/04/2023 |
|
Collation |
5 pages : illustrations ; 28 cm |
Notes |
Caption title. At head of title: Project summary. "June 1982." "EPA/600-S3-82-010." |
Contents Notes |
"A new method for quantifying biogenic hydrocarbon emission rates without disturbing the vegetation is presented. An energy balance/Bowen ratio approach was used to estimate fluxes of alpha-pinene from measurements of net radiation and vertical gradients of alpha-pinene, temperature, and water vapor above a loblolly pine forest canopy. The mean flux for 20 determinations ranging from 19 to 84 /micro-g/m2/min was 41 /micro-g/mVmin. This method was compared to an enclosure method, in which foliage is enclosed with a Teflon bag for emission rate determinations. For this comparison, the energy balance/Bowen ratio flux values were converted to emission rate units of micro-g alpha-pinene/g dry needle mass/hr using site-specific biomass factors. Seventeen enclosure method determinations from mature loblolly pine trees yielded a median value of 4.7 /micro-g/g/hr over a range of 1.2 to 32 micro-g/g/hr. While both methods displayed relatively high variances, the variance of the enclosure method was considerably higher than that of the energy balance/Bowen ratio method. There was no statistically significant difference between the results of the two methods."--P. [1]. |