Articles | Volume 7, issue 21
Atmos. Chem. Phys., 7, 5543–5553, 2007

Special issue: The total solar eclipse of 2006 and its effects on the...

Atmos. Chem. Phys., 7, 5543–5553, 2007

  06 Nov 2007

06 Nov 2007

The effect of the total solar eclipse of 29 March 2006 on meteorological variables in Greece

D. Founda1, D. Melas2, S. Lykoudis1, I. Lisaridis2, E. Gerasopoulos1, G. Kouvarakis3, M. Petrakis1, and C. Zerefos1 D. Founda et al.
  • 1National Observatory of Athens, Institute for Environmental Research and Sustainable Development, Greece
  • 2Aristotle University of Thessaloniki, Physics Department, Laboratory of Atmospheric Physics, Thessaloniki, Greece
  • 3University of Crete, Chemistry Department, Environmental and Chemical Processes Laboratory, Crete, Greece

Abstract. This paper examines the effect of the total solar eclipse of 29 March 2006 on meteorological variables across Greece. Integrated micrometeorological measurements were conducted at Kastelorizo, a small island within the path of totality, and other sites within the Greek domain, with various degrees of solar obscuration. The observations showed a dramatic reduction in the incoming global radiation and subsequent, pronounced changes in surface air temperature with the lowest temperature values occurring about 15 min after the full phase. The amplitude of the air temperature drop was not analogous to the obscuration percentage but was principally determined by the surrounding environment (mainly the sea influence), the background meteorological conditions and local cloudiness. Surface wind-speed decreased in most sites as a result of the cooling and stabilization of the atmospheric boundary layer. This perturbation provided a unique opportunity to apply a sensitivity analysis on the effect of the eclipse to the Weather Research and Forecast (WRF) numerical mesoscale meteorological model. Strong anomalies, not associated with a dynamic response, were simulated over land especially in surface air temperature. The simulated temperature drop pattern was consistent with the observations.

Final-revised paper