Evaluation of an urban NMHC emission inventory by measurements and impact on CTM results

This paper presents an evaluation of the consistency of an urban state-of-the-art hydrocarbon (HC) emission inventory. The evaluation was conducted through the comparison of this inventory with hourly HC measurements during two summer months in the centre of Marseille, on the Mediterranean French coast. Factors of under or overestimation could be calculated for each compound on the basis of a systematic HC to HC ratio analysis. These results, associated with a deep analysis of the speciation profiles, show that most of the common and highly concentrated hydrocarbons (such as butanes) are too much predominant in the emission speciation, while the heavy and less common species (branched alkanes, substituted aromatics) are under-represented in the inventory. The urban diffuse sources appear here as one critical point of the inventories. The disagreements were shown to have a strong incidence on the representation of the air mass reactivity. In a last step, the identified uncertainties in emissions were implemented in an air-quality model for sensitivity studies. It was shown that the observed biases in the inventory could affect the regional ozone production, with a probable impact on ozone peaks of 2-10 ppbv over the area. © 2010 Elsevier Ltd

A Propòsit del gènere Mizodorcatoma Hayashi, 1955. (coleoptera, anobidae)

L'estudi d'un exemplar català de l'indicat gènere (Miguel Tomás leg.) que fou descrit del Japó i que actualment està àmpliament escampat per Europa, Àsia i Àfrica, m'ha portat a revisar-ne la totalitat dels representants coneguts. Es tracta d'un gènere estretament relacionat amb Dorcatoma Herbst i Caenocara Thomson amb els quals sovint s'ha confós; se separa, això no obstant, d'un i altre per diferents particularitats dependents de la morfologia externa i de la genitàlia, detallats en aquest estudi.Genus Mizodorcatoma Hayashi, 1955 (Coleoptera, Anobiidae). Rising from the study of a Catalan specimen of this genus (Miguel Tomás leg.) the whole genus, which was described from Japan but at present widely spread by Europe, Asia and Africa, is revised. It is a genus closely related with Dorcatoma Herbst and Caenocara Thomson with which it has often been confused. However separated from them both by different particularities of morphology and aedeagus given in this study