Skip to main content
Ir a la página de inicio de la Comisión Europea (se abrirá en una nueva ventana)
español es
CORDIS - Resultados de investigaciones de la UE
CORDIS
Contenido archivado el 2024-04-19

Reduction of Solar Radiation by Manmade Aerosol and thus Modified clouds in Europe

Objetivo

To assess the reduction of the solar flux by anthropogenic
aerosol in Europe.

Aerosol particles in the atmosphere reflect solar radiation and thus form a cooling factor. The cooling induced by anthropogenic aerosol counterbalances the warming by the man made greenhouse gases. However, the magnitude of the compensation factor is very uncertain. The dominant problem in quantifying the 'aerosol' effect on radiation is the localized character of the aerosol.

The effect of anthropogenic aerosol on local radiation/climate in Europe is being assessed. This is realized along 3 interconnected approaches. In recent estimates of the reduction in radiation in Europe the value for light scattering by aerosol was taken from United States measurements. This value is compared with the actual value in Europe. Furthermore, the historical trend in solar flux is related to the historic trend in aerosol loadings. Finally, the full effect of aerosol on radiation/climate is modelled. The radiation module being developed is validated with special field campaigns. In these experiments the relevant aerosol characteristics are determined and from these the reduction in solar radiation is calculated and compared with the measured reduction.
Aerosol particles reflect solar radiation back into space and thus less
heat reaches the earth surface. Aerosol does not intercept the outgoing
terrestrial radiation and thus the net result is a cooling, which is
estimated to compensate the warming by the greenhouse gases
in Europe.

Because of the very localized character of aerosol, a localized
assessment of the aerosol-forcing is required. This is realized along
three interconnected approaches.

The recent estimates of the reduction in radiation by aerosol in Europe
are extrapolations of ground-level light-scattering measurements in the
US. It is checked here which data are available in Europe and what the
actual scattering by European aerosol is. The European aerosol has a
large nitrate-content and the light-scattering of this compound will be
studied in detail. These results will be used in support of the next two
approaches.

A decrease in solar flux over the last decades has been observed in three
countries in Europe. Here, the trend on the cloudless days is analyzed.
A search is made for available data on aerosol loadings in the same
period to be compared with the trend in the solar flux. The relation will
give an empirical factor for the aerosol forcing.

A simple 1-D version of the climate model ECHAM is made and aerosol is
parametrized in this model, for a calculation of the local cooling effect
of aerosol. First, the radiative forcing is calculated with a module
which uses the averaged parameters of the standardized "Climatology"
aerosol. This aerosol seems outdated and new detailed measurements are
made to check its validity. Simultaneously, solar radiation and relevant
meteorological parameters are measured.
The reduction in solar flux is calculated from the measured aerosol
parameters and this is compared to the measured reduction in solar flux.
The reduction will also be compared to the reduction calculated with the
"Climatology" aerosol and so the best up-to-date aerosol parameters are
obtained.
A last validation of the aerosol/radiation model comes from a comparison
of modeled and measured trends in radiation.

A start is made of assessing which type of (anthropogenic) aerosol
particles serve as cloud nuclei for the climate-relevant clouds in
Europe.

Ámbito científico (EuroSciVoc)

CORDIS clasifica los proyectos con EuroSciVoc, una taxonomía plurilingüe de ámbitos científicos, mediante un proceso semiautomático basado en técnicas de procesamiento del lenguaje natural. Véas: El vocabulario científico europeo..

Para utilizar esta función, debe iniciar sesión o registrarse

Programa(s)

Programas de financiación plurianuales que definen las prioridades de la UE en materia de investigación e innovación.

Tema(s)

Las convocatorias de propuestas se dividen en temas. Un tema define una materia o área específica para la que los solicitantes pueden presentar propuestas. La descripción de un tema comprende su alcance específico y la repercusión prevista del proyecto financiado.

Convocatoria de propuestas

Procedimiento para invitar a los solicitantes a presentar propuestas de proyectos con el objetivo de obtener financiación de la UE.

Datos no disponibles

Régimen de financiación

Régimen de financiación (o «Tipo de acción») dentro de un programa con características comunes. Especifica: el alcance de lo que se financia; el porcentaje de reembolso; los criterios específicos de evaluación para optar a la financiación; y el uso de formas simplificadas de costes como los importes a tanto alzado.

CSC - Cost-sharing contracts

Coordinador

ENERGY RESEARCH CENTRE OF THE NETHERLANDS
Aportación de la UE
Sin datos
Coste total

Los costes totales en que ha incurrido esta organización para participar en el proyecto, incluidos los costes directos e indirectos. Este importe es un subconjunto del presupuesto total del proyecto.

Sin datos

Participantes (3)

Mi folleto 0 0