Daily meteorological observations in Cadiz-San Fernando.: Analysis of the documentary sources and the instrumental data content (1786-1996)

Meteorological observations in the city of Cadiz are acknowledged as having been made from the middle of the 18th century onwards although they were only recorded and preserved in documentary form from 1789 onwards. Data readings were taken at the new Naval Observatory in San Fernando, ten kilometres from Cadiz, from 1797 onwards. Continuous series for temperature and atmospheric pressure at a daily resolution have been compiled and constructed from 1817 until 1996. The data series is composed of thrice daily observations made at Cadiz (1821-1880) by local observers and hourly data from Naval Observatory at San Fernando (1870-1996).