Physics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.506..161l&link_type=abstract
In: Solar variability: from core to outer frontiers. The 10th European Solar Physics Meeting, 9 - 14 September 2002, Prague, Cze
Physics
1
Solar Luminosity: Earth Atmosphere
Scientific paper
It is now theoretically well understood that the solar limb shape is distorted mainly due to the complex interior and surfacic rotation profiles. It may result faint changes in the irradiance that could explain fluctuations that are not modelized through the classical approach. Such departures to the sphericity are also now observed and we will present here some new measurements. To explain such an observed variability of the solar radius with the latitude, i.e. the asphericities, a new theory is here introduced. In a near future, simultaneous space irradiance and diameter measurements will be available permitting an accurate determination of the ratio W, a parameter known to be both a key indicator of the effect of solar activity on terrestrial environment and an important factor for solar modeling. By measuring W, we will study the influence of solar radius variability on the Earth climate. Furthermore, by comparing the temporal radius variations with the global Earth temperatures, unexpected strong analogous variations are obtained that are briefly statistically discussed.
Lefebvre Sandrine
Rozelot Jean-Pierre
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