<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Fares, S.</style></author><author><style face="normal" font="default" size="100%">Matteucci, G.</style></author><author><style face="normal" font="default" size="100%">Scarascia Mugnozza, G.</style></author><author><style face="normal" font="default" size="100%">Morani, a.</style></author><author><style face="normal" font="default" size="100%">Calfapietra, C.</style></author><author><style face="normal" font="default" size="100%">Salvatori, E.</style></author><author><style face="normal" font="default" size="100%">Fusaro, L.</style></author><author><style face="normal" font="default" size="100%">Manes, F.</style></author><author><style face="normal" font="default" size="100%">Loreto, F.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Testing of models of stomatal ozone fluxes with field measurements in a mixed Mediterranean forest</style></title><secondary-title><style face="normal" font="default" size="100%">Atmospheric Environment</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">GPP</style></keyword><keyword><style  face="normal" font="default" size="100%">mediterranean forest</style></keyword><keyword><style  face="normal" font="default" size="100%">Ozone ﬂuxes</style></keyword><keyword><style  face="normal" font="default" size="100%">Stomatal conductance models</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2013</style></year></dates><publisher><style face="normal" font="default" size="100%">Elsevier Ltd</style></publisher><volume><style face="normal" font="default" size="100%">67</style></volume><pages><style face="normal" font="default" size="100%">242-251</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Mediterranean forests close to urban areas are exposed to polluted plumes loaded with tropospheric ozone. This is the case of Castelporziano Estate, a 6000 ha Mediterranean forest 25 km from Rome downtown on the coast of the Mediterranean Sea. In September 2011 we started an intensive ﬁeld campaign aimed at investigating ozone deposition from a mixed Mediterranean forest, mainly composed by Quercus suber, Quercus ilex, Pinus pinea. Measurements at canopy level with the eddy covariance technique were supported by a vegetation survey and the measurement of all environmental parameters which allowed to calculate stomatal ozone ﬂuxes. Leaf-level measurements were used to parameterize models to calculate stomatal conductance based on a Jarvis-type and BalleBerry approach. We show changes in magnitude of ozone ﬂuxes from a warm (September) to a cold period (OctobereDecember). Stomatal component explained almost the totality of ozone ﬂuxes during the cold days, but contributed only up to 50% to total ozone deposition during warm days, suggesting that other sinks (e.g. chemistry in the gas-phase) play a major role. Modeled stomatal ozone ﬂuxes based on a Jarvis-type approach (DO3SE) correlated with measured ﬂuxes better than using a BalleBerry approach. A third model based on a modiﬁed BalleBerry equation was proposed to account for the non-linear dependency of stomatal conductance on relative humidity. This research will help the development of metrics for ozone-risk assessment and advance our understanding of mixed Mediterranean forests in biosphereeatmosphere exchange.</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Fares, S.</style></author><author><style face="normal" font="default" size="100%">Mereu, S.</style></author><author><style face="normal" font="default" size="100%">Scarascia Mugnozza, G.</style></author><author><style face="normal" font="default" size="100%">Vitale, M.</style></author><author><style face="normal" font="default" size="100%">Manes, F.</style></author><author><style face="normal" font="default" size="100%">Frattoni, M.</style></author><author><style face="normal" font="default" size="100%">Ciccioli, P.</style></author><author><style face="normal" font="default" size="100%">Gerosa, G.</style></author><author><style face="normal" font="default" size="100%">Loreto, F.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">The ACCENT-VOCBAS field campaign on biosphere-atmosphere interactions in a Mediterranean ecosystem of Castelporziano (Rome): site characteristics, climatic and meteorological conditions, and eco-physiology of vegetation</style></title><secondary-title><style face="normal" font="default" size="100%">Biogeosciences</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">BVOC emission</style></keyword><keyword><style  face="normal" font="default" size="100%">Castelporziano</style></keyword><keyword><style  face="normal" font="default" size="100%">Mediterranean ecosystem</style></keyword><keyword><style  face="normal" font="default" size="100%">stress (voyant)</style></keyword><keyword><style  face="normal" font="default" size="100%">Water availability</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2009</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2009///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.biogeosciences.net/6/1043/2009/</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">6</style></volume><pages><style face="normal" font="default" size="100%">1043 - 1058</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Biosphere-atmosphere interactions were investigated on a sandy dune Mediterranean ecosystem in a ﬁeld campaign held in 2007 within the frame of the European Projects ACCENT and VOCBAS. The campaign was carried out in the Presidential estate of Castelporziano, a periurban park close to Rome. Former campaigns (e.g. BEMA) performed in Castelporziano investigated the emission of biogenic volatile organic compounds (BVOC). These campaigns focused on pseudosteppe and evergreen oak groves whereas the contribution of the largely biodiverse dune vegetation, a prominent component of the Mediterranean ecosystem, was overlooked. While speciﬁc aspects of the campaign will be discussed in companion papers, the general climatic and physiological aspects are presented here, together with information regarding BVOC emission from the most common plant species of the dune ecosystem. During the campaign regular air movements were observed, dominated by moderate nocturnal land breeze and diurnal sea breeze. A regular daily increase of ozone concentration in the air was also observed, but daily peaks of ozone were lower than those measured in summer on the same site. The site was ideal as a natural photochemical reactor to observe reaction, transport and deposition processes occurring in the Mediterranean basin, since the sea-land breeze circulation allowed a strong mixing between biogenic and anthropogenic emissions and secondary pollutants. Measurements were run in May, when plant physiological conditions were optimal, in absence of severe drought and heat stress. Foliar rates of photosynthesis and transpiration were as high as generally recorded in unstressed Mediterranean sclerophyllous plants. Most of the plant species emitted high level of monoterpenes, despite measurements being made in a period in which emissions of volatile isoprenoids could be restrained by developmental and environmental factors, such as leaf age and relatively low air temperature. Emission of isoprene was generally low. Accounting for the high monoterpene spring emission of the dune ecosystem may be important to correct algorithms at regional and ecosystem levels, and to interpret measurements of ﬂuxes of volatile isoprenoids and secondary pollutants.</style></abstract><issue><style face="normal" font="default" size="100%">6</style></issue></record></records></xml>