Assessing surface solar irradiance and its long-term variations in the northern Africa desert climate using Meteosat images.
In: International Journal of Remote Sensing, Jg. 31 (2010-01-10), Heft 1, S. 261-280
Online
academicJournal
Zugriff:
Two databases of solar surface irradiance (SSI) derived from satellites were compared to ground measurements in Algeria, Egypt, Libya and Tunisia. We found that it was possible to accurately derive the SSI from geostationary meteorological satellites, even with a coarse spatial resolution. The two databases HelioClim-1 (HC1) and SSE exhibited similar and good performances. The bias was generally lower for SSE than for HC1; however, HC1 exhibited a smaller scattering of data compared to ground measurements (smaller standard deviation) than the SSE, allowing better performance when mapping the long-term variations in SSI. The long-term variations in SSI from 1985 to 2005 show that these four countries as a whole experienced dimming. Detailed analyses of the range of dimming at sites with long-term records and of its spatial distribution were performed. We found that the analysis of SSI from HC1 supports the findings for the individual sites. Dimming may be explained by: (1) transportation of sand dust northwards from the Sahel, (2) an increase in urbanization, and (3) an increase in cloud cover and aerosol loading. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Remote Sensing is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Titel: |
Assessing surface solar irradiance and its long-term variations in the northern Africa desert climate using Meteosat images.
|
---|---|
Autor/in / Beteiligte Person: | Wahab, Magdy Abdel ; El-Metwally, Mossad ; Hassan, Reda ; Lefèvre, Mireille ; Oumbe, Armel ; Wald, Lucien |
Link: | |
Zeitschrift: | International Journal of Remote Sensing, Jg. 31 (2010-01-10), Heft 1, S. 261-280 |
Veröffentlichung: | 2010 |
Medientyp: | academicJournal |
ISSN: | 0143-1161 (print) |
DOI: | 10.1080/01431160902882645 |
Schlagwort: |
|
Sonstiges: |
|