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| Titel |
Long-term variability of cloudiness over NE Iberia from late 18th century: preliminary results |
| VerfasserIn |
Arturo Sanchez-Lorenzo, Elena Guinaldo, Jordi Via, Josep Calbó, Mariano Barriendos, Marc Prohom |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250039481
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| Zusammenfassung |
| This work presents preliminary results regarding cloudiness variability over the northeastern
Iberian Peninsula from late 18th century until the present. Analyzed data are in situ visual
observations from different surface meteorological stations, and the studied variables are
overcast and cloud-free sky frequencies covering the 1865-2007 period. Using total cloud
cover (TCC) estimations in oktas (1961-2004 period, Sanchez-Lorenzo et al., 2009) and their
relationship with overcast/cloud-free sky frequencies, we estimated TCC changes from
mid-19th century up to the present. We completed the analysis by using partially digitalized
sky observations that were taken during the Early Instrumental Period in Barcelona and
Valencia cities since the late 18th century. For the first time, this work tries to use this
data in order to reconstruct cloudiness variability records using the available visual
observations recorded previously to the establishment of official meteorological
services.
Sanchez-Lorenzo, A., J. Calbó, M. Brunetti, and C. Deser (2009),
Dimming/brightening over the Iberian Peninsula: Trends in sunshine duration
and cloud cover and their relations with atmospheric circulation, J. Geophys.
Res., 114, D00D09, doi:10.1029/2008JD011394. |
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