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| Autor principal: | |
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
| Publicado: |
PANGAEA
2022
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| Materias: | |
| Acceso en línea: | https://doi.org/10.1594/PANGAEA.946923 |
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- The presented spectral aerosol optical depth (AOD) data are measured with an active tracking Sun photometer SPTA. The system was installed under a quartz dome of Polar 5 to derive this mentioned AOD. It operates a filter wheel with ten selected wavelengths in the spectral range from 367 to 1024 nm. To measure the direct solar irradiance, the optics of the SPTA use an aperture with a field of view of 1°. With knowledge of the extraterrestrial signal, the spectral optical depth of the atmosphere as well as spectral optical depth of aerosol was derived. The extraterrestrial signal was calculated based on a Langley calibration, which are performed regularly in a high mountain area (Izana, Tenerife). The data were screened for contamination by clouds to minimize an artificial enhancement of the AOD. The cloud screening algorithm applied a threshold of measured irradiance and made use of the higher temporal and spatial variability of clouds compared to the rather smooth changes of aerosols properties.