Sunshine duration as a proxy of the atmospheric aerosol content
One of the most important radiative properties of aerosols is their optical thickness (AOD), which is closely linked to the total burden of atmospheric aerosols. On the contrary, we do avail of long time series of sunshine duration (SD) measurements, which is defined as the total time length of thos...
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| Tipo de recurso: | tesis doctoral |
| Estado: | Versión publicada |
| Fecha de publicación: | 2016 |
| País: | España |
| Institución: | CBUC, CESCA |
| Repositorio: | TDR. Tesis Doctorales en Red |
| OAI Identifier: | oai:www.tdx.cat:10803/394045 |
| Acceso en línea: | http://hdl.handle.net/10803/394045 |
| Access Level: | acceso abierto |
| Palabra clave: | Atmospheric aerosols Aerosols atmosfèrics Aerosoles atmosféricos Solar radiation Radiación solar Radiació solar Campbell-Stokes sunshine recorder Heliògraf Campbell-Stokes Heliógrafo Campbell-Stokes Climatic changes Canvis climàtics Cambios climáticos 53 |
| Sumario: | One of the most important radiative properties of aerosols is their optical thickness (AOD), which is closely linked to the total burden of atmospheric aerosols. On the contrary, we do avail of long time series of sunshine duration (SD) measurements, which is defined as the total time length of those sub-periods for which the direct solar irradiance exceeds a certain threshold. In the past, the Campbell-Stokes sunshine recorder (CSSR) has been the most common instrument for measuring SD. Specifically, SD is obtained measuring the length of the burn produced on a cardboard. The principal goal of the present thesis is to investigate the suitability of sunshine observations, as well as the width of the burn on the cards, for detecting changes in atmospheric aerosol load for both high time resolution and long time scales. The initial hypothesis is that an increase of AOD reduces both SD and the burn width. |
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