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Seasonality of monoterpene emission potentials in Quercus ilex and Pinus pinea : implications for regional VOC emissions modeling
Keenan, Trevor (Centre de Recerca Ecològica i Aplicacions Forestals)
Niinemets, Ülo (Eesti Maaülikool. Institut of Agricultural and Environmental Sciences)
Sabaté i Jorba, Santi (Centre de Recerca Ecològica i Aplicacions Forestals)
Gracia, Carles (Centre de Recerca Ecològica i Aplicacions Forestals)
Peñuelas, Josep (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)

Date: 2009
Abstract: VOC emissions from terrestrial ecosystems provide one of the principal controls over oxidative photochemistry in the lower atmosphere and the resulting air pollution. Such atmospheric processes have strong seasonal cycles. Although similar seasonal cycles in VOC emissions from terrestrial ecosystems have been reported, regional emissions inventories generally omit the effect of seasonality on emissions. We compiled measurement data on seasonal variations in monoterpene emissions potentials for two evergreen species (Quercus ilex and Pinus pinea) and used these data to construct two contrasting seasonal response functions for the inclusion in monoterpene emission models. We included these responses in the Niinemets et al. model and compared simulation results to those of the MEGAN model, both with and without its predicted seasonality. The effect of seasonality on regional monoterpene emissions inventories for European Mediterranean forests dominated by these species was tested for both models, using the GOTILWA+ biosphere model platform. The consideration of seasonality in the Niinemets et al. model reduced total estimated annual monoterpene emissions by up to 65% in some regions, with largest reductions at lower latitudes. The MEGAN model demonstrated a much weaker seasonal response than that in the Niinemets et al. model, and did not capture the between species seasonality differences found in this study. Results suggest that previous regional model inventories based on one fixed emission factor likely overestimate regional emissions, and species-specific expressions of seasonality may be necessary. The consideration of seasonality both largely reduces monoterpene emissions estimates, and changes their expected seasonal distribution.
Note: Número d'acord de subvenció EC/FP5/00075
Note: Número d'acord de subvenció EC/FP5/506675
Note: Número d'acord de subvenció EC/FP6/512464
Note: Número d'acord de subvenció EC/FP7/212535
Note: Número d'acord de subvenció MEC/CGL2006-04025
Note: Número d'acord de subvenció MICINN/CSD2008-00040
Note: Número d'acord de subvenció AGAUR/2005/SGR-00312
Rights: Tots els drets reservats
Language: Anglès.
Document: article ; recerca ; publishedVersion
Subject: Monoterpene emission ; Regional VOC emission
Published in: Journal of geophysical research : atmospheres, Vol. 114 Issue D22 (Nov. 2009) , p. D22202, ISSN 2169-897X

DOI: 10.1029/2009JD011904


11 p, 390.6 KB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (scientific output) > Experimental sciences > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Articles > Research articles
Articles > Published articles

 Record created 2015-04-14, last modified 2019-02-03



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