Modelling study of the impact of deep convection on the utls air composition - Part I: Analysis of ozone precursors

The aim of this work is to study the local impact on the upper troposphere/lower stratosphere air composition of an extreme deep convective system. For this purpose, we performed a simulation of a convective cluster composed of many individual deep convective cells that occurred near Bauru (Brazil). The simulation is performed using the 3-D mesoscale model RAMS coupled on-line with a chemistry model. The comparisons with meteorological measurements show that the model produces meteorological fields generally consistent with the observations. The present paper (part I) is devoted to the analysis of the ozone precursors (CO, NO x and non-methane volatile organic compounds) and HO x in the UTLS. The simulation results show that the distribution of CO with altitude is closely related to the upward convective motions and consecutive outflow at the top of the convective cells leading to a bulge of CO between 7 km altitude and the tropopause (around 17km altitude). The model results for CO are consistent with satellite-borne measurements at 700 hPa. The simulation also indicates enhanced amounts of NO x up to 2 ppbv in the 7-17 km altitude layer mainly produced by the lightning associated with the intense convective activity. For insoluble non-methane volatile organic compounds, the convective activity tends to significantly increase their amount in the 7-17km layer by dynamical effects. During daytime in the presence of lightning NO x, this bulge is largely reduced in the upper part of the layer for reactive species (e.g. isoprene, ethene) because of their reactions with OH that is increased on average during daytime. Lightning NO x also impacts on the oxydizing capacity of the upper troposphere by reducing on average HO x, HO 2, H 2O 2 and organic hydroperoxides. During the simulation time, the impact of convection on the air composition of the lower stratosphere is negligible for all ozone precursors although several of the simulated convective cells nearly reach the tropopause. There is no significant transport from the upper troposphere to the lower stratosphere, the isentropic barrier not being crossed by convection. The impact of the increase of ozone precursors and HO x in the upper troposphere on the ozone budget in the LS is discussed in part II of this series of papers.

Desenvolvimento profissional em um grupo de trabalho: professores de matemática que ensinam por meio de softwares educacionais

Pós-graduação em Educação para a Ciência - FC

Oficina na atenção psicossocial: experimentações com a palavra

The Word Workshop was created in 2004, as an activity of the training period in Psychosocial Care in the Collective Health, a discipline that is part of the curriculum of the Psychology course offered by the State of São Paulo’s University “Júlio de Mesquita Filho”/UNESP, campus of Assis. Initially, it is possible to affirm that the Word Workshop contributes to stimulate the flow of the words through the discussion of tales, short stories, poetry, jokes and news. The Word Workshop is considered an effort towards the guarantee of a space where the users of the mental health care service can share varied experiences and it is also thought as an attempt that can, potentially, bring up the conditions through which some existential meanings may possibly be forked. Such a space-instrument allows the mental health care users to speak about life and their interests rather than to keep focused in symptoms and complains. These ones, by their turn, are expressed through metaphors, unprecedented speech experiences and new sensitivity regimes. The critical analysis of the singular experience of the Word Workshop, that understands the words as agents of social transformation, was conceived with the support of Enrique Pichon-Rivière’s and Paulo Freire’s theories. From this first theoretical reading, it is possible to make an incursion through the scenery of the Psychosocial Care Workshops, paying special attention to their potential and to the risks related to crystallized practices.