Stratospheric Ozone and Solar Radiation
Ozone and solar ultraviolet radiation activities represent one of the main research lines of the ESAt since 1980. There are available ozone data since 1980, being the longest ozone time series in Spain. There are also available more than ten years of UV spectral irradiance and erythemal irradiance records.
Within these research lines, the following can be pointed out:
- Total ozone content measurements with the Dobson#120 spectrophotometer since 1980.
- Continuous monitoring and application of standard QA/QC criteria to the database and instruments:
- Erythemal irradiance by using a YES UVB-1 biometer since 1996.
- Brewer MK-III#150 since 1997, measuring total ozone content, spectral UV irradiance, SO2 and AOD in the UV region.
- Eldonet radiometer since 1998, measuring 3 broadband channel in UV.B, UV.A and PAR solar irradiance respectively.
- YES MFR-7 multi filter rotating shadow band, since 2001 measuring global, direct and diffuse ultraviolet radiation in 7 channels.
- Kipp Zonen CM11 piranometer, since 2007, measuring global solar radiation.
- All sky camera, since 2007, measures the sky state.
The different studies carried out comprise a great deal of atmospheric parameters necessary for the knowledge and study of the ozone and ultraviolet radiation climatology, and the processes which affect it, the impact of ultraviolet radiation on the environment and influence of cloudiness on the ultraviolet radiation, and total ozone content among others.
The ESAt is the station 213 of the Ozone World Watch Network and has a Radiometric Calibration Laboratory in which numerous instruments measuring solar radiation are calibrated and possible sources of error which can influence the data are studied.
Due to the excellent geographical location, horizon, climatology and infrastructures; the ESAt is the head office for national and international calibration campaigns for instruments measuring ozone and solar radiation. This observatory, also due to the excellent relations with many research institutions, is frequently used to host instruments from other centers.
Nowadays, the ESAT collaborates very actively with several national and international institutions among which the following can be pointed out: the “Consejería de Medio Ambiente de la Junta de Andalucía”, University of Extremadura, “Agencia Estatal española de meteorología” (AEMET), the World Radiation Center (PMOD/WRC), COST-726 European Action, etc.