If you are experiencing problems downloading PDF or HTML fulltext, our helpdesk recommend clearing your browser cache and trying again. If you need help in clearing your cache, please click here . Still need help? Email help@ingentaconnect.com

Assessing surface solar irradiance and its long-term variations in the northern Africa desert climate using Meteosat images

$61.74 plus tax (Refund Policy)

Buy Article:

Abstract:

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.

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/01431160902882645

Affiliations: 1: Department of Astronomy and Meteorology, Faculty of Science, Cairo University, Cairo, Egypt 2: Department of Physics, Faculty of Science at Port Said, Suez Canal University, Port Said, Egypt 3: Egyptian Meteorological Authority, Kubry El-Qubba, Cairo, Egypt 4: Mines ParisTech, Centre for Energy and Processes, BP 207, 06904 Sophia Antipolis Cedex, France

Publication date: March 1, 2010

More about this publication?
Related content

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more