Reconstruction of the solar EUV irradiance from 1996 to 2010 based on SOHO/EIT images
The solar Extreme UltraViolet (EUV) spectrum has important effects on the Earth’s upper atmosphere. For a detailed investigation of these effects it is important to have a consistent data series of the EUV spectral irradiance available. We present a reconstruction of the solar EUV irradiance based o...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2014-01-01
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| Series: | Journal of Space Weather and Space Climate |
| Subjects: | |
| Online Access: | https://www.swsc-journal.org/articles/swsc/full_html/2014/01/swsc130045/swsc130045.html |
| _version_ | 1819275631932735488 |
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| author | Haberreiter Margit Delouille Véronique Mampaey Benjamin Verbeeck Cis Del Zanna Giulio Wieman Seth |
| author_facet | Haberreiter Margit Delouille Véronique Mampaey Benjamin Verbeeck Cis Del Zanna Giulio Wieman Seth |
| author_sort | Haberreiter Margit |
| collection | DOAJ |
| description | The solar Extreme UltraViolet (EUV) spectrum has important effects on the Earth’s upper atmosphere. For a detailed investigation of these effects it is important to have a consistent data series of the EUV spectral irradiance available. We present a reconstruction of the solar EUV irradiance based on SOHO/EIT images, along with synthetic spectra calculated using different coronal features which represent the brightness variation of the solar atmosphere. The EIT images are segmented with the SPoCA2 tool which separates the features based on a fixed brightness classification scheme. With the SOLMOD code we then calculate intensity spectra for the 10–100 nm wavelength range and each of the coronal features. Weighting the intensity spectra with the area covered by each of the features yields the temporal variation of the EUV spectrum. The reconstructed spectrum is then validated against the spectral irradiance as observed with SOHO/SEM. Our approach leads to good agreement between the reconstructed and the observed spectral irradiance. This study is an important step toward understanding variations in the solar EUV spectrum and ultimately its effect on the Earth’s upper atmosphere. |
| first_indexed | 2024-12-23T23:27:24Z |
| format | Article |
| id | doaj.art-0eb0871be14c46cba7ce86da9faac925 |
| institution | Directory Open Access Journal |
| issn | 2115-7251 |
| language | English |
| last_indexed | 2024-12-23T23:27:24Z |
| publishDate | 2014-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | Journal of Space Weather and Space Climate |
| spelling | doaj.art-0eb0871be14c46cba7ce86da9faac9252022-12-21T17:26:11ZengEDP SciencesJournal of Space Weather and Space Climate2115-72512014-01-014A3010.1051/swsc/2014027swsc130045Reconstruction of the solar EUV irradiance from 1996 to 2010 based on SOHO/EIT imagesHaberreiter MargitDelouille VéroniqueMampaey BenjaminVerbeeck CisDel Zanna GiulioWieman SethThe solar Extreme UltraViolet (EUV) spectrum has important effects on the Earth’s upper atmosphere. For a detailed investigation of these effects it is important to have a consistent data series of the EUV spectral irradiance available. We present a reconstruction of the solar EUV irradiance based on SOHO/EIT images, along with synthetic spectra calculated using different coronal features which represent the brightness variation of the solar atmosphere. The EIT images are segmented with the SPoCA2 tool which separates the features based on a fixed brightness classification scheme. With the SOLMOD code we then calculate intensity spectra for the 10–100 nm wavelength range and each of the coronal features. Weighting the intensity spectra with the area covered by each of the features yields the temporal variation of the EUV spectrum. The reconstructed spectrum is then validated against the spectral irradiance as observed with SOHO/SEM. Our approach leads to good agreement between the reconstructed and the observed spectral irradiance. This study is an important step toward understanding variations in the solar EUV spectrum and ultimately its effect on the Earth’s upper atmosphere.https://www.swsc-journal.org/articles/swsc/full_html/2014/01/swsc130045/swsc130045.htmlCoronaSunSolar cycleSpectral irradianceSpace Weather |
| spellingShingle | Haberreiter Margit Delouille Véronique Mampaey Benjamin Verbeeck Cis Del Zanna Giulio Wieman Seth Reconstruction of the solar EUV irradiance from 1996 to 2010 based on SOHO/EIT images Journal of Space Weather and Space Climate Corona Sun Solar cycle Spectral irradiance Space Weather |
| title | Reconstruction of the solar EUV irradiance from 1996 to 2010 based on SOHO/EIT images |
| title_full | Reconstruction of the solar EUV irradiance from 1996 to 2010 based on SOHO/EIT images |
| title_fullStr | Reconstruction of the solar EUV irradiance from 1996 to 2010 based on SOHO/EIT images |
| title_full_unstemmed | Reconstruction of the solar EUV irradiance from 1996 to 2010 based on SOHO/EIT images |
| title_short | Reconstruction of the solar EUV irradiance from 1996 to 2010 based on SOHO/EIT images |
| title_sort | reconstruction of the solar euv irradiance from 1996 to 2010 based on soho eit images |
| topic | Corona Sun Solar cycle Spectral irradiance Space Weather |
| url | https://www.swsc-journal.org/articles/swsc/full_html/2014/01/swsc130045/swsc130045.html |
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