Degradation of ozone-depleting methyl halides in the troposphere characterized by isotopes

Información del proyecto

DEMETROPIS

Identificador del acuerdo de subvención: 701350

DOI

10.3030/701350

Proyecto cerrado

Fecha de la firma de la CE 29 Febrero 2016

Fecha de inicio 1 Octubre 2016

Fecha de finalización 30 Septiembre 2018

Financiado con arreglo a

• EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions

Coste total

€ 159 460,80

Aportación de la UE

€ 159 460,80

Coordinado por

HELMHOLTZ-ZENTRUM FUR UMWELTFORSCHUNG GMBH - UFZ
Germany

Objetivo

The stratospheric ozone layer is an important shield to protect life on earth. Most of the short-waved UVB radiation is absorbed which otherwise would cause skin cancer and genetic damage. Destruction of the ozone layer by halogen radicals was discovered in the 1970s and consequently production of many halogenated compounds was curtailed. Methyl chloride (CH3Cl) and methyl bromide (CH3Br), important contributors of halogens in the stratosphere, are emitted by both natural and anthropogenic sources but significant gaps remain in the calculated atmospheric budget due to uncertainties concerning formation mechanisms and/or overestimation of degrada-tion processes. In this study a conceptual framework will be developed to apply innovative multi-element isotope analysis (2H, 13C, 81Br, 37Cl) for delineating sources and sinks of methyl halides, reducing the budget uncertainties and discrepancies. The specific aim is to isotopically identify and characterize oxidation of methyl halides by hydroxyl radicals, the main degradation process, both to understand the fate of these important pollutants in the environment but foremost to resolve the impact on any future isotope based approach for source apportionment. The results of this project will also have broader impact as the information and interpretational frameworks developed will be applicable to research on other environmentally relevant gases, e.g. greenhouse gases. Returning to the EU the applicant will expand his own doctoral experiences obtained in Sweden, and bring to the proposed work his innovative experiences and techniques on CFCs developed through his current post-doctoral research in Canada. Therewith this project not only counteracts brain drain but, based on the unique combination of expertise of all contributors, the applicant will be able to bring his past and current research skills and insight to bear to start developing his own research career within the proposed field.

Ámbito científico (EuroSciVoc)

• ciencias médicas y de la salud › medicina clínica › oncología › melanoma
• ciencias naturales › ciencias químicas › electroquímica › electrólisis
• ciencias naturales › ciencias de la tierra y ciencias ambientales conexas › ciencias ambientales › disminución de la capa de ozono
• ciencias naturales › ciencias químicas › química inorgánica › halógenos
• ciencias naturales › ciencias de la tierra y ciencias ambientales conexas › ciencias de la atmósfera › meteorología › troposfera

Palabras clave

• methyl chloride
• methyl bromide
• ozone depletion
• source apportionment
• global mass balance
• hydroxyl radical reaction
• multi-dimensional isotope analysis
• d2H
• d13C
• d37Cl
• d81Br

Programa(s)

• H2020-EU.1.3. - EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions PROGRAMA PRINCIPAL
  
• H2020-EU.1.3.2. - Nurturing excellence by means of cross-border and cross-sector mobility
  

Tema(s)

• MSCA-IF-2015-EF - Marie Skłodowska-Curie Individual Fellowships (IF-EF)
  

Régimen de financiación

MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF)

Convocatoria de propuestas

H2020-MSCA-IF-2015

Coordinador

HELMHOLTZ-ZENTRUM FUR UMWELTFORSCHUNG GMBH - UFZ

• Aportación neta de la UEn: € 159 460,80
• Dirección: PERMOSERSTRASSE 15 ; 04318 LEIPZIG ; Alemania
• Región: Sachsen › Leipzig › Leipzig
• Tipo de actividad: Research Organisations
• Coste total: € 159 460,80