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Record 2 of 30
Monoterpene emission from ponderosa pine
External Online Source: doi:10.1029/94JD00406
Author and Affiliation:
Lerdau, Manual(Stanford Univ., Standford, CA, United States)
Dilts, Stephen B.(Washington State Univ., Pullman, WA, United States)
Westberg, Hal(Washington State Univ., Pullman, WA, United States)
Lamb, Brian K.(Washington State Univ., Pullman, WA, United States)
Allwine, Eugene J.(Washington State Univ., Pullman, WA, United States)
Abstract: We explore the variability in monoterpene emissions from ponderosa pine beyond that which can be explained by temperature alone. Specifically, we examine the roles that photosynthesis and needle monoterpene concentrations play in controlling emissions. We measure monoterpene concentrations and emissions, photosynthesis, temperature, and light availability in the late spring and late summer in a ponderosa pine forest in central Oregon. We use a combination of measurements from cuvettes and Teflon bag enclosures to show that photosynthesis is not correlated with emissions in the short term. We also show that needle monoterpene concentrations are highly correlated with emissions for two compounds, alpha-pinene and beta-pinene, but that Delta-carene concentrations are not correlated with emissions. We suggest that direct effects of light and photosynthesis do not need to be included in emission algorithms. Our results indicate that the role of needle concentration bears further investigation; our results for alpha-pinene and beta-pinene are explainable by a Raoult's law relationship, but we cannot yet explain the cause of our results with Delta-carene.
Publication Date: Aug 20, 1994
Document ID:
19950044355
(Acquired Dec 28, 1995)
Accession Number: 95A75954
Subject Category: ENVIRONMENT POLLUTION
Document Type: Journal Article
Publication Information: Journal of Geophysical Research; p. p. 16,609-16,615; (ISSN 0148-0227); 99; D8
Publisher Information: United States
Contract/Grant/Task Num: EPA-CR-817390010
Financial Sponsor: NASA; United States
Organization Source: NASA Ames Research Center; Moffett Field, CA, United States
Description: 7p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ANNUAL VARIATIONS; ATMOSPHERIC COMPOSITION; CHEMICAL COMPOSITION; CONIFERS; PHOTOCHEMICAL REACTIONS; TERPENES; TISSUES (BIOLOGY); AMBIENT TEMPERATURE; FORESTS; GAS CHROMATOGRAPHY; LUMINOUS INTENSITY; OREGON; PHOTOSYNTHESIS; REGRESSION ANALYSIS; SPRING (SEASON); SUMMER; VAPOR PRESSURE
Imprint And Other Notes: Journal of Geophysical Research vol. 99, no. D8 p. 16,609-16,615 August 20, 1994
Availability Source: Other Sources
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