Solar irradiance and total ozone over El Arenosillo (Spain) during the solar eclipse of 3 October 2005

Details Solar irradiance and total ozone over El Arenosillo (Spain) during the solar eclipse of 3 October 2005 Solar irradiance and total ozone over El Arenosillo (Spain) during the solar eclipse of 3 October 2005

Jun 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010jastp..72..789a&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 72, Issue 9-10, p. 789-793.

Physics

1

Eclipse, Total Irradiance, Ultraviolet Irradiance, Total Ozone

Scientific paper

The ground track of the annular eclipse of 3 October 2005 crossed the Iberian Peninsula. The main objective of this work was to analyze the variability of the solar irradiance and the total ozone column during the course of this event at El Arenosillo (Southwestern Spain). For achieving this goal, two Kipp Zonen broadband radiometers (one for measuring total solar irradiance and other for measuring ultraviolet erythemal solar irradiance), one NILU-UV multi-band instrument and one Brewer spectroradiometer were used in this work. Total irradiance (310-2800 nm), and ultraviolet erythemal radiation (UVER) were recorded at a high frequency of 5 s, showing a strong reduction (higher than 80%) of the irradiance at the maximum solar obscuration which was of 79.6%. The irradiance decrease during the course of the eclipse was positively correlated with the percentage of eclipse obscuration, showing a very high agreement (R2~0.99). The irradiance recorded at selected wavelengths from the NILU-UV instrument shows a more pronounced decrease in the UV irradiance at the lower wavelengths during the solar eclipse. Finally, the evolution of the total ozone column (TOC) derived from Brewer and NILU instruments during the eclipse presented an opposite behavior: while the Brewer derived TOC values increase about 15 DU, the NILU derived TOC values decrease about 11 DU. This opposite behavior is mainly related to an artifact in the spectral irradiances recorded by the two instruments.

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