G. Angeletti – författare

Dimethylsulphide (DMS), emitted by marine phytoplankton, is the second most important source of atmospheric sulphur, after anthropogenic SO2. In the atmosphere, DMS is transformed into condensable acidic sulphur products and, through gas-to-particle conversion, it becomes the most important natural source of atmospheric sulphate aerosols. Possible climatic effects have been suggested, linked to the negative radiative forcing due to scattering of solar radiation and especially to modification of cloud albedo over oceans by sulphate aerosol particles. These effects occur in addition to those deriving from the superimposed anthropogenic component of the atmospheric sulphate. Understanding the cycle of DMS in the marine troposphere and its interaction with the aerosol budget and cloud properties has become a key research target over the past few years. Our knowledge of the many processes involved is still fragmentary, however.This book, which updates the state of our comprehension of the marine DMS cycle with special regard to its climatic impact, should be of interest to marine biologists, atmospheric chemists, aerosol physicists and climatologists, and to scientists concerned with changes in the Earth's climate.

Dimethylsulphide (DMS), emitted by marine phytoplankton, is the second most important source of atmospheric sulphur, after anthropogenic SO2. In the atmosphere, DMS is transformed into condensable acidic sulphur products and, through gas-to-particle conversion, it becomes the most important natural source of atmospheric sulphate aerosols. Possible climatic effects have been suggested, linked to the negative radiative forcing due to scattering of solar radiation and especially to modification of cloud albedo over oceans by sulphate aerosol particles. These effects occur in addition to those deriving from the superimposed anthropogenic component of the atmospheric sulphate. Understanding the cycle of DMS in the marine troposphere and its interaction with the aerosol budget and cloud properties has become a key research target in these last years. Our knowledge of the many processes involved is still fragmentary, however.This book, which updates the state of our comprehension of the marine DMS cycle with special regard to its climatic impact, will be of interest to marine biologists, atmospheric chemists, aerosol physicists and climatologists, and to scientists concerned with changes in the Earth's climate.

In this book, the proceedings of the Third European Symposium on "Analysis of Organic Micropollutants in Water", held in Oslo (Norway), from 19 to 21 September 1983, are presented. The symposium was organized within the framework of the Concerted Ac­ tion COST 64b bis *, which has the same name and is included in the Third R&D Programme on Environment of the Commission of the European Communi­ ties - Indirect and Concerted Actions - 1981 to 1985. The aim of the symposium was to review the progress and results achiev­ ed during the past two years, since the Second symposium, held in Killarney (Ireland) in November 1981. The programme of the symposium consisted of review papers covering dif­ ferent areas related to the analysis of the organic pollutants in water, in­ cluding sampling and sample treatment, gas and liquid chromatography, mass spectrometry and specific analytical problems for some types of compounds. We think that the volume gives a rather complete overview of these activities in Europe. Moreover, the paper presented by D. Hunt reviews the development of the new technique mass spectrometry - mass spectrometry in the United States of America. Some special sessions concerned the presentation of original contri­ butions in form of poster, the extended versions of which are published in this volume.

Le rassemblement sur la zone industrielle de FOS-BERRE d'une densite importante de mesures meteorologiques et physioo-chimiques, per- met de proposer, dans Ie cadre de notre action COST 61 a bis, l'utilisa- tion de ces mesures pour initialiser et verifier divers types de modeles. L'objectif initial de cette campagne est l'intercomparaison d'instruments de teledetection. II s'agit d'une des campagnes effectuees periodiquement, en des sites differents a l'initiative des Communautes europeennes. Ces campagnes comportent deux phases: la premiere est l'inter- calibration des instruments au m@me point, et la seconde est l'estimation des flux de polluants sur la zone etudiee. Effectuee en general a l'aide de moyens mobiles de teledetec- tion, cette estimation ne peut @tre assuree que si lion connatt Ie champ de vent et Ie profil vertical de temperature (et, bien sOr, les caracte- ristiques des sources polluantes).L'Etablissement d'Etudes et de Recherches Meteorologiques de la Meteorologie Nationale (EERM) et Ie Service Etudes et Recherches de l'E- lectricite de France (EDF) sollicites pour fournir l'assistance meteoro- logique correspondante, ont propose, du fait de la presence de moyens im- portants sur Ie site, une campagne mesometeorologique. Ce deuxieme objec- tif a permis d'obtenir des donnees tres completes, que les modelisateurs europeens devraient pouvoir utiliser. II - Aspects meteorologigues, reconstitution des champs Le site de FOS-BERRE se caracterise par sa geographie tourmen- tee: presence de la mer, de l'Etang de Berre et de reliefs. Toutefois, Ie mecanisme engendrant les fortes pollutions reste en gros Ie m@me que sur site homogene.

The Commission of the European Communities presents with this volume the proceedings and the conclusions of the second European Symposium on the analysis of organic micropollutants in water. This symposium has been organized within the framework of the Concerted Action "Analysis of Organic Micropollutants in Water". This research programme is jointly implemented by the European Communities and Norway, Portugal, Spain, Sweden, Switzerland and Yugoslavia within the framework of a COST (Cooperation Scientifique et Technique) agreement. The project, also known as COST Project 64b bis, aims at coordinating all relevant research in this field in the participating countries. An effort is made to improve methods and techniques for the identification and quantitative determination of organic compounds present in all types of water. The symposium permitted to review the results achieved during the past three years of research in the following areas: - Sampling and sample treatment - Gas-chromatography Separation of non-volatile compounds, in particular high performance liquid chromatography (HPLC) - Mass-spectrometry - Data processing - Specific analytical problems, in particular the analysis of organic halogens and phenolic compounds. The volume gives a rather complete overview of the activities in this field in Europe. We are confident that it constitutes a valuable contribution to solving the important problems posed by the huge number of already identified or yet unknown organic pollutants in water. The Commission of the European Communities wishes to express their sincere thanks to the co-organizers, the National Board for Science and Technology, Dublin and An Foras Forbartha, Dublin.

Proceedings of the Sixth European Symposium held in Lisbon, Portugal, May 22-24, 1990

In October 1979 the First European Symposium on Physico-Chemical Behaviour of Atmospheric Pollutants was held In Ispra (Italy); 83 scientists attended the conference contributing 44 papers. Ten years later, the Fifth European Symposium on Physico-Chemical Behaviour of Atmospheric Pollutants, organized as for the previous Symposia In the framework of the Concerted Action *COST 611, was held in Varese (Italy) from 25 to 28 September 1989. This Volume contains the oral papers and the posters presented at this Symposium. Participation at this Conference Is more than doubled of that In 1979 In terms of scientists (185) and contributed papers (110). This simple comparison demonstrates once more the growing attention of the scientific community to the problems related to the pollution of the atmosphere. During these years, Important new Issues have arisen (global pol lutlon/cl Imatlc changes) whl Ie old ones have been reviewed due to new experimental evidence (depletion of stratospheric ozone). The Symposium offered the best opportunity for a review of the current studies and technical progress achieved In the various sectors of the Concerted Action since the Fourth Symposium held In Stresa (Italy) In September 1986. In 1987 the scientific programme and the operational structures of the COST 611 Project were revised. The Project Is now structured into three Working Parties: 1. Development of Analytical Methods to measure Trace Components of the Atmosphere. 2. Atmospheric Chemical and Photochemical Processes. 3. Field measurements and their Interpretation.

This volume contains oral papers and posters presented at the "Fifth European Symposium on Organic Micropollutants in the Aquatic Environment" held in Rome (Italy) from 20 to 22 October 1987. The Symposium was organ- ised within the framework of the Concerted Action COST 641*) which is in- cluded in the Fourth R&D Programme on the Environment of the Commission of the European Communities. As for the previous symposia, the aim was to review current studies and technical progress in the area of organic micropollutants in the aquatic environment, particularly since the last symposium held in Vienna in October 1985. The programme consisted of review papers and posters re- lated to analytical methodologies, transport and transformation of or- ganic micropollutants in water, water treatment processes and mathemat- ical modelling. Special sessions were devoted to laboratory data treat- ment and environmental scenarios. These proceedings provide a good overview of the activities in this fieiu in Europe and constitute a valuable contribution to the understanding and solution of the problems posed by organic micropollutants in the aquatic environment.The Commission of the European Communities wishes to express sincere thanks to the co-organizers of the Symosium, in particular to Mr A. Liberatori and T. La Noce of the Consiglio Nazionale delle Ricerche, Istituto di Ricerca sulle Acque, Rome.

WOUIRG PARTY I: AlIALYSIS or POLLUTAIITS Chairman: A. LIBERTI (CNR - Roma, I) Summary by the Chairman 3 Detection of gaseous nitric acid by OH (A~X) - fluorescence gen- erated by ArF-laser irradiation Th. PAPENBROCK and F. STUHL 5 Preparation of standard atmospheres of nitrogen acid compounds: the N02 permeation tube I. ALLEGRINI, P. BUTTINI, V. DI PALO and M. POSSANZINI 15 Automated denuder systems J. SLANINA, A. M. VAN WENSVEEN, C. A. M. SCHOONEBEEK and P. I. VOORS 25 A battery-powered light-weight ozone analyzer for use in the troposphere and stratosphere S. SARAND, W. SPEUSER and U. SCHURATH 33 H202 in solid precipitation A. NEFTEL, A. SIGG and P. JACOB 45 Detection of nitrated and oxygenated polyaromatic hydrocarbons (PAR) in suspended particulate matter sampled in urban areas and their relation with anthropogenic emission and photochemical smog formation A. CECINATO, E. BRANCALEONI, C. DI PALO, R. DRAISCI and P. CICCIOLI 58 Field intercomparison of sampling and analytical methods for S02 and S04 in ambient air K. NODOP and J. E. HANSSEN 69 Field measurements on the use of denuders for the evaluation of acid deposition Istituto sull'Inquinamento Atmosferico del C. N. R., Mon- rotondo, Italy 79 -vii- Use of air - S02 mixtures for intercomparison of S02 monitors in the EEC M. PAYRI S SAT , H. RAU and G. SERRINI 103 Determination of polychlorinated dibenzo-P-dioxins and dibenzofurans in outdoor air P. KIRSCHMER and M.