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Titolo:
Seasonal variation in amount and composition of monoterpenes emitted by young Pinus pinea trees - Implications for emission modeling
Autore:
Staudt, M; Bertin, N; Frenzel, B; Seufert, G;
Indirizzi:
Univ Hohenheim, Inst Bot, D-70593 Stuttgart, Germany Univ Hohenheim Stuttgart Germany D-70593 Bot, D-70593 Stuttgart, Germany JRC Ispra, Inst Environm, I-21020 Ispra, Italy JRC Ispra Ispra Italy I-21020 Ispra, Inst Environm, I-21020 Ispra, Italy
Titolo Testata:
JOURNAL OF ATMOSPHERIC CHEMISTRY
fascicolo: 1, volume: 35, anno: 2000,
pagine: 77 - 99
SICI:
0167-7764(200001)35:1<77:SVIAAC>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
ORGANIC-COMPOUND EMISSIONS; QUERCUS-ILEX L.; ISOPRENE EMISSION; HYDROCARBON EMISSIONS; BIOGENIC EMISSIONS; WATER-STRESS; WHITE OAK; TEMPERATURE; LIGHT; LEAVES;
Keywords:
monoterpene emission; Mediterranean pine; seasonal variation; light; temperature; algorithms; model;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Physical, Chemical & Earth Sciences
Citazioni:
51
Recensione:
Indirizzi per estratti:
Indirizzo: Staudt, M CNRS, DREAM Unit, CEFE1919, Route Mende, F-34293 Montpellier 5, France CNRS Route Mende Montpellier France 5 293 Montpellier 5, France
Citazione:
M. Staudt et al., "Seasonal variation in amount and composition of monoterpenes emitted by young Pinus pinea trees - Implications for emission modeling", J ATMOS CH, 35(1), 2000, pp. 77-99

Abstract

Current inventories of terpenes released from vegetation consider only theshort-term influences of light and temperature on emissions to simulate temporal variation during the year. We studied whole canopy emissions from young Pinus pinea during a 15-month enclosure in greenhouse chambers and examined data for other long-term influences. Mean daytime emission rates strongly increased during spring, reached an annual maximum of approximate to 200 pmol m(-2) total needle area s(-1) (1.1 mu g g(-1) leaf dry weight h(-1))between mid June and mid August, strongly declined in fall and reached an annual minimum of approximate to 1 pmol m(-2) s(-1) (0.006 mu g g(-1) h(-1)) between January and February. Normalization to standard temperature and light conditions did not change the annual time course of emissions, but reduced summer to winter ratio from a factor of 200 to about 45. Seasonal variation was characterized also by changes in terpene composition: among the six main compounds, three (t-beta-ocimene, linalool, 1.8-cineol) were exclusively emitted during sunlit hours in the main vegetation period, whereas the other (limonene, alpha-pinene, myrcene) were emitted day and night and throughout the seasons. The results suggest that different terpene sources inP. pinea foliage exist and that a great part of the annual emission courseobserved here results from seasonal influences on these sources. A global model to simulate plant emissions is proposed, which accounts for seasonal influences on emissions in addition to the short-term effects of temperature and light. The model is tested on field data and discussed for its general application.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 11:56:17