Margit haberreiter pmod wrc davos switzerland cis verbeeck veronique delouille rami qahwaji
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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

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EUV Irradiance Reconstruction in view of PROBA2

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Margit haberreiter pmod wrc davos switzerland cis verbeeck veronique delouille rami qahwaji

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


Euv irradiance reconstruction in view of proba2

O


Absorption of euv in the earth s atmosphere

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!!


Global mean neutral density vs f10 7

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)


Neutral density versus euv irradiance

ESWW9, Brussels, Nov 4-7 2012 Margit Haberreiter

Neutral Density versus EUV irradiance


Modeling the solar euv spectrum

Modeling the Solar EUV Spectrum

  • Wavelengths

    • UV: 120 – 400 nm

    • EUV: 10 – 120 nm

  • Contribution from the

    • Chromophere

    • Transition region

    • Corona


Iterative process

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)


Comparison to sdo eve observations

ESWW9, Brussels, Nov 4-7 2012 Margit Haberreiter

Comparison to SDO/EVE observations

Haberreiter, 2011, Solar Physics, 274, 473


Synthetic euv spectra

ESWW9, Brussels, Nov 4-7 2012 Margit Haberreiter

Synthetic EUV Spectra

Quiet Corona

Quiet Coronal Network

Active Coronal Network

Hot loops

Super hot loops


Eit image decomposition

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


Area coverage over solar cycle 23

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


Reconstruction of the euv for solar cycle 23

ESWW9, Brussels, Nov 4-7 2012 Margit Haberreiter

Reconstruction of the EUV for solar cycle 23

Haberreiter, 2012, IAU Symposium 286


Swap integrated intensities

ESWW9, Brussels, Nov 4-7 2012 Margit Haberreiter

SWAP integrated intensities

  • Mean of off-limb contribution:  35%


Reconstruction of the euv for solar cycle 231

ESWW9, Brussels, Nov 4-7 2012 Margit Haberreiter

Reconstruction of the EUV for solar cycle 23


Fp7 space project solid

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


Conclusion

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


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