Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
doi:10.5194/acp-2017-48
© Author(s) 2017. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
14 Mar 2017
Review status
This discussion paper is under review for the journal Atmospheric Chemistry and Physics (ACP).
Long-term series of surface solar radiation at Athens, Greece
Stelios Kazadzis1,2, Dimitra Founda2, Bill Psiloglou2, Haralambos Kambezidis2, Nikolaos Mihalopoulos2,3, Arturo Sanchez-Lorenzo4, Charikleia Meleti5, Panagiotis I. Raptis1,2, Frangiskos Pierros2, and Pierre Nabat6 1Physikalisch-Meteorologisches Observatorium Davos, World Radiation Center (PMOD/WRC) Dorfstrasse 33, CH-7260 Davos Dorf, Switzerland
2Institute of Environmental Research and Sustainable Development, National Observatory of Athens, Greece
3Department of Chemistry, Univ. of Crete, Heraklion, Crete
4Instituto Pirenaico de Ecología, Consejo Superior de Investigaciones Científicas (IPE-CSIC), Zaragoza, Spain
5Physics Department, Aristotle University of Thessaloniki, Greece
6CNRM UMR 3589, Météo-France/CNRS, Toulouse, France
Abstract. We present a long-term series of solar surface radiation (SSR) for the city of Athens, Greece. The SSR measurements were performed from 1953 to 2012, and before that (1900–1952) sunshine duration (SD) records have been used in order to reconstruct monthly SSR. Analysis from the whole dataset (1900–2012) mainly showed: a decrease of 2.9 % per decade in SSR from 1910 to 1940 assuming a linear change in SSR. For the dimming period (1955–1980), a −2 % change per decade has been observed, that matches various European long-term SSR measurement related studies. This percentage for Athens is in the lower limit, compared to other studies for the Mediterranean area. For the brightening period (1980–2012) we have calculated a +1.5 % per decade which is also in the lower limit of the reported positive changes in SSR around Europe. Comparing the 30-year periods (1954–1983 and 1983–2012) we have found a difference of 4.5 %. The difference was observed for all seasons except winter. Using an analysis of SSR calculations of all sky and clear sky (cloudless) conditions/days, we report that most of the observed changes in SSR after 1954 can be attributed partly to cloudiness and mostly to aerosol load changes.

Citation: Kazadzis, S., Founda, D., Psiloglou, B., Kambezidis, H., Mihalopoulos, N., Sanchez-Lorenzo, A., Meleti, C., Raptis, P. I., Pierros, F., and Nabat, P.: Long-term series of surface solar radiation at Athens, Greece, Atmos. Chem. Phys. Discuss., doi:10.5194/acp-2017-48, in review, 2017.
Stelios Kazadzis et al.
Stelios Kazadzis et al.
Stelios Kazadzis et al.

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Short summary
The National Observatory of Athens have been collecting solar radiation, sunshine duration, cloud and visibility data/ observations from the begining of the 20th century. In this work we present surface solar radiation data since 1953 and reconstructed data since 1900. We tried to show and discusss the long term changes in solar surface radiation over Athens, Greece using these unique datasets.
The National Observatory of Athens have been collecting solar radiation, sunshine duration,...
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