Open AccessVolatile organic compound emissions from Scots pine: Mechanisms and description by algorithms
Author(s) -
Shao Min,
Czapiewski Kristin V.,
Heiden Arnd C.,
Kobel Klaus,
Komenda Michael,
Koppmann Ralf,
Wildt Jürgen
Publication year - 2001
Publication title -
journal of geophysical research: atmospheres
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/2000jd000248
Subject(s) - isoprene , monoterpene , scots pine , chemistry , photosynthesis , environmental science , volatile organic compound , environmental chemistry , botany , pinus <genus> , organic chemistry , biology , biochemistry , copolymer , polymer
The mechanisms of volatile organic compound (VOC) emissions from Scots pine ( Pinus sylvestris L.) were investigated in laboratory experiments. The plants emitted mainly monoterpenes and acetone. Isoprene was emitted only in small amounts, but the mechanisms of its emissions were similar to those of the other compounds. Isoprene, acetone, and monoterpene emissions from Scots pine could be well described by an algorithm that considers emissions caused by evaporation of VOCs out of pools and emissions in parallel with their biosynthetic production. Monoterpene emissions were mainly affected by temperature. In some cases, monoterpene emissions were also influenced by photosynthetic active radiation implying that monoterpene emissions from Pinus sylvestris occur from storage pools as well as from processes that are linked to monoterpene biosynthesis. The coupling of monoterpene emissions with photosynthesis was confirmed by results of experiments with 13 CO 2 . The 13 CO 2 exposure resulted in emission of 13 C labeled monoterpenes during 13 CO 2 exposure as well as during the night following the exposure. Similar results were also obtained for isoprene emissions. Scots pine emitted isoprene during illumination as well as in darkness. The emitted isoprene was labeled during 13 CO 2 exposure and in the night following the exposure. The results obtained for monoterpene emissions in the laboratory were compared to those of outdoor measurements with Scots pine. While the temperature dependencies of emission rates were comparable to those obtained from laboratory experiments, a PAR dependence was not detectable. Temperature variations during outdoor measurements prevented a detection of this dependence.