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The first Iberian UV radiation inter-comparison was held at "El Arenosillo"- Huelva station of the Instituto Nacional de Tecnica Aeroespatial (INTA) from September 1 to 10, 1999. During this campaign, seven Brewer spectrophotometers and one Li-Cor spectrophotometer measured the total column aerosol optical depth (AOD) at 306, 310, 313.5, 316.75 and 320 nm. The AOD calibration of one Brewer was transferred to all other Brewers using one day of intensive measurements. The remaining days were used to observe the stability and reproducibility of the AOD measurements by the different instruments. All Brewer spectrophotometers agreed to within an AOD of 0.03 during the whole measurement campaign. The differences in AOD between the Li-Cor spectrophotometer and the Brewer spectrophotometers were between -0.07 and +0.02 at 313.5, 316.75, and 320 nm. This investigation demonstrates the possibility of using the existing worldwide Brewer network as a global UV aerosol network for AOD monitoring.

Additional information

Authors: GROBNER J, JRC, Environment Institute, Ispra (IT);REMBGES D, JRC, Environment Institute, Ispra (IT);VERGAZ R, Grupo de Optica Atmosferica, Universidad de Valladolid (ES);CACHORRO V.E, Grupo de Optica Atmosferica, Universidad de Valladolid (ES);HENRIQUES D.V, Instituto de Meteorologia, Lisboa (PT);LAMB K, International Ozone Services, Toronto (CA);REDONDAS A, Instituto Nacional de Meteorologia, Observatorio Atmosferico de Izana (ES);VILAPLANA J.M, Instituto Nacional de TECNICA Aerospatial, Estacion de Ozono Sondeos de "El Arenosillo", Huelva (ES)
Bibliographic Reference: An article published in: Geophysical Research Letters, vol.28 (2001) pp.1691-1694
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