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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20130416T123000
DTEND;TZID=Atlantic/Canary:20130416T133000
UID:iactalks-484
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/484
CREATED:2013-04-16T12:30:00+01:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Considering three-dimensional effects in spectral irradiance modeli
 ng 
DESCRIPTION:Considering three-dimensional effects in spectral irradiance mo
 deling \nDr. Han Uitenbroek\n\nTotal spectral irradiance is typically mode
 led by assinging an atmospheric model to each pixel of a full disk image a
 nd geometricllay combining the predicted wavelength dependent intensity fo
 r each of these models into a disk integrated spectrum. This works reasona
 bly well, as the hydrostatic models that are used in this procedure genera
 lly reproduce observed spectra very well. However, for numerical expedienc
 e this scheme neglects some important physical aspects of the the solar at
 mosphere, in particular its three-dimensional and strongly dynamic nature.
  In this talk I will discuss the importance of some of these effects on th
 e spectral irradiance signal, using forward radiative transfer modeling in
  realistic three-dimenional simulations. Obviously, modeling the three-dim
 ensional dynamic structure over the whole disk is computaionally prohibiti
 ve, but if some of the effects discused above are important, strategies wi
 ll have to be implemented to incorporate them approximately. Characterizin
 g these cotributions to the spectral irradiance will also help us to bette
 r understand the physical nature of the forces that drive variability, and
  hopefully improve our predictive capabilities. 
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