1 / 16

EUV Irradiance Reconstruction in view of PROBA2

Margit Haberreiter, PMOD/WRC, Davos, Switzerland Cis Verbeeck, Veronique Delouille, Rami Qahwaji. EUV Irradiance Reconstruction in view of PROBA2. O. Absorption of EUV in the Earth‘s atmosphere. Altitude-wavelength dependence of energy deposition from solar irradiance

dusty
Download Presentation

EUV Irradiance Reconstruction in view of PROBA2

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Margit Haberreiter, PMOD/WRC, Davos, Switzerland Cis Verbeeck, Veronique Delouille, Rami Qahwaji EUV Irradiance Reconstruction in view of PROBA2 ESWW9, Brussels, Nov 4-7 2012 Margit Haberreiter

  2. O

  3. Absorption of EUV in the Earth‘s atmosphere Altitude-wavelength dependence of energy deposition from solar irradiance units of Log10(Wm-4) From Solomon and Qian 2005 Solar minimum conditions EUV varies by a factor of 2 and more!!

  4. ESWW9, Brussels, Nov 4-7 2012 Margit Haberreiter Global Mean Neutral Density vs F10.7 Long-term variation due to solar forcing (here F10.7) Short-term variations visible in geomagnetic variations (Ap index)

  5. ESWW9, Brussels, Nov 4-7 2012 Margit Haberreiter Neutral Density versus EUV irradiance

  6. Modeling the Solar EUV Spectrum • Wavelengths • UV: 120 – 400 nm • EUV: 10 – 120 nm • Contribution from the • Chromophere • Transition region • Corona

  7. EUV reconstruction - Semi-empirical modeling ESWW9, Brussels, Nov 4-7 2012 Margit Haberreiter Iterative process nlevel, nel,nion,… (x,y,z,t) I(λ,μ,φ,t) I(λ,μ,φ,t)

  8. ESWW9, Brussels, Nov 4-7 2012 Margit Haberreiter Comparison to SDO/EVE observations Haberreiter, 2011, Solar Physics, 274, 473

  9. ESWW9, Brussels, Nov 4-7 2012 Margit Haberreiter Synthetic EUV Spectra Quiet Corona Quiet Coronal Network Active Coronal Network Hot loops Super hot loops

  10. ESWW9, Brussels, Nov 4-7 2012 Margit Haberreiter EIT Image Decomposition June 1, 2003 Coronal Hole Mask Active Region Mask SPoCA Image Decomposition: Cis Verbeeck, ROB

  11. ESWW9, Brussels, Nov 4-7 2012 Margit Haberreiter Area coverage over solar cycle 23 Barra et al., 2009, A&A Data from Barra et al, 2009

  12. ESWW9, Brussels, Nov 4-7 2012 Margit Haberreiter Reconstruction of the EUV for solar cycle 23 Haberreiter, 2012, IAU Symposium 286

  13. ESWW9, Brussels, Nov 4-7 2012 Margit Haberreiter SWAP integrated intensities • Mean of off-limb contribution:  35%

  14. ESWW9, Brussels, Nov 4-7 2012 Margit Haberreiter Reconstruction of the EUV for solar cycle 23

  15. ESWW9, Brussels, Nov 4-7 2012 Margit Haberreiter FP7 Space Project SOLID • SOLID: First European Comprehensive SOLar Irradiance Data exploitation • Coordinator PMOD/WRC (W. Schmutz, Project Manager: M. Haberreiter) • Start: December 2012 • 10 Partners from 7 European Countries (CH, F, B, UK, D, EL, I) • Compilation and Analysis of the existing irradiance observations from the XUV/EUV, UV, visible to the IR along with the state-of-the-art irradiance modelling results Poster 3.1 Haberreiter et. al

  16. ESWW9, Brussels, Nov 4-7 2012 Margit Haberreiter Conclusion • Understanding the physical mechanisms that drive solar spectral irradiance variations is important for Space Weather studies • Successful reconstruction based on EIT image analysis • Improvement of implementation of extended corona • Extend the reconstruction to PROBA2 time series based on SWAP decomposition • More to come soon within the FP7 SOLID project

More Related