An overview of the Castelporziano experiments

Seufert, G.; Bartzis, John G.; Bomboi, T; Ciccioli, P.; Cieslik, S.; Dlugi, R.; Foster, P.; Hewitt, C. Nicholas; Kesselmeier, J.; Kotzias, D.; Lenz, Roman; Manes, Fausto; Pastor, Ricardo; Steinbrecher, R.; Torres, L.; Валентини, Р.; Versino, B.

doi:10.1016/s1352-2310(97)00334-8

Cited by 108 publications

(65 citation statements)

References 31 publications

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“…For evergreen oaks, the MTL algorithm is used (equation. 5b) Guenther et al (1994Guenther et al ( , 1997, Geron et al(1994) for American woodlands, and by and Seufert et al (1997) for European species. Very little reliable experimental data on the emissions of OVOCs is available, and consequently Guenther et al (1994) recommended the use of a uniform emission rate of 1.5 µg g -1 h -1 for all tree species, recognizing that this was a first order approximation to a ten-fold range (0.5-5 µg g -1 h -1 ).…”

Section: Conifersmentioning

confidence: 99%

Long-range aerosol transport from Europe to Istanbul, Turkey

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Ünal

Chen

et al. 2006

Atmospheric Environment

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Section: Conifersmentioning

confidence: 99%

Long-range aerosol transport from Europe to Istanbul, Turkey

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Ünal

Chen

et al. 2006

Atmospheric Environment

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“…In Europe, BVOC emissions in the Mediterranean area were extensively studied as part of the Biogenic Emissions in the Mediterranean Area (BEMA) project Ciccioli et al, 1997;Kesselmeier et al, 1997;Owen et al, , 2001Owen et al, , 2002Seufert et al, 1997;. The BEMA project focused on emissions from the Castelporziano nature reserve near Rome, Italy.…”

Section: B Davison Et Al: Bvoc Concentrations and Fluxes From Italymentioning

confidence: 99%

Concentrations and fluxes of biogenic volatile organic compounds above a Mediterranean macchia ecosystem in western Italy

et al. 2009

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Abstract. Emission rates and concentrations of biogenic volatile organic compounds (BVOCs) were measured at a Mediterranean coastal site at Castelporziano, approximately 25 km south-west of Rome, between 7 May and 3 June 2007, as part of the ACCENT-VOCBAS field campaign on biosphere-atmosphere interactions. Concentrations and emission rates were measured using the disjunct eddy covariance (DEC) method utilizing three different proton transfer reaction mass spectrometers (PTR-MS) so allowing a comparison between the instruments. The high resolution data from the PTR-MS instruments considerably enhances the original BEMA measurements of the mid 1990s.Depending on the measurement period, the volume mixing ratios were in the range 1.6-3.5 ppbv for methanol, 0.44-1.3 ppbv for acetaldehyde, 0.96-2.1 ppbv for acetone, 0.10-0.14 ppbv for isoprene, and 0.13-0.30 ppbv for monoterpenes. A diurnal cycle in mixing ratios was apparent with daytime maxima for methanol, acetaldehyde, acetone, and isoprene. The fluxes ranged from 370-440 µg m −2 h −1 for methanol, 180-360 µg m −2 h −1 for acetaldehyde, 180-450 µg m −2 h −1 for acetone, 71-290 µg m −2 h −1 for isoprene, and 240-860 µg m −2 h −1 for monoterpenes. From the measured flux data (7 May-3 June) an average basal emission rate for the Macchia vegetation was calculated

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“…In order to compare the effect of the seasonality in the three model approaches, simulations are additionally run with a fixed emission factor of 28 µg gDW −1 h −1 (Seufert et al, 1997) which is in good accordance with the measured maximum factor at the site in Puéchabon reported by Lavoir et al (2009). The value has been transformed into enzyme activity using the reciprocal of Eq.…”

Section: Emission Enzyme Activity and Emissions Potentialsmentioning

confidence: 99%

Process-based simulation of seasonality and drought stress in monoterpene emission models

et al. 2010

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Abstract. Canopy emissions of volatile hydrocarbons such as isoprene and monoterpenes play an important role in air chemistry. They depend on various environmental conditions, are highly species-specific and are expected to be affected by global change. In order to estimate future emissions of these isoprenoids, differently complex models are available. However, seasonal dynamics driven by phenology, enzymatic activity, or drought stress strongly modify annual ecosystem emissions. Although these impacts depend themselves on environmental conditions, they have yet received little attention in mechanistic modelling.In this paper we propose the application of a mechanistic method for considering the seasonal dynamics of emission potential using the "Seasonal Isoprenoid synthase Model" (Lehning et al., 2001). We test this approach with three different models (GUENTHER, Guenther et al., 1993; NI-INEMETS, Niinemets et al., 2002a; BIM2, Grote et al., 2006) that are developed for simulating light-dependent monoterpene emission. We also suggest specific drought stress representations for each model. Additionally, the proposed model developments are compared with the approach realized in the MEGAN (Guenther et al., 2006) emission model. Models are applied to a Mediterranean Holm oak (Quercus ilex) site with measured weather data.The simulation results demonstrate that the consideration of a dynamic emission potential has a strong effect on annual monoterpene emission estimates. The investigated models, however, show different sensitivities to the procedure for determining this seasonality impact. Considering a drought impact reduced the differences between the applied models and decreased emissions at the investigation site by approxiCorrespondence to: R. Grote (ruediger.grote@imk.fzk.de) mately 33% on average over a 10 year period. Although this overall reduction was similar in all models, the sensitivity to weather conditions in specific years was different. We conclude that the proposed implementations of drought stress and internal seasonality strongly reduce estimated emissions and indicate the measurements that are needed to further evaluate the models.

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An overview of the Castelporziano experiments

Cited by 108 publications

References 31 publications

Long-range aerosol transport from Europe to Istanbul, Turkey

Long-range aerosol transport from Europe to Istanbul, Turkey

Concentrations and fluxes of biogenic volatile organic compounds above a Mediterranean macchia ecosystem in western Italy

Process-based simulation of seasonality and drought stress in monoterpene emission models

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