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Making of a solar spectral irradiance dataset I: observations, uncertainties, and methods
- Source :
- Journal of Space Weather and Space Climate, Vol 6, p A14 (2016), Journal of Space Weather and Space Climate, Journal of Space Weather and Space Climate, EDP sciences, 2016, 6, pp.A14. ⟨10.1051/swsc/2016007⟩, Journal of Space Weather and Space Climate, 2016, 6, pp.A14. ⟨10.1051/swsc/2016007⟩
- Publication Year :
- 2016
- Publisher :
- EDP Sciences, 2016.
-
Abstract
- Context. Changes in the spectral solar irradiance (SSI) are a key driver of the variability of the Earth’s environment, strongly affecting the upper atmosphere, but also impacting climate. However, its measurements have been sparse and of different quality. The “First European Comprehensive Solar Irradiance Data Exploitation project” (SOLID) aims at merging the complete set of European irradiance data, complemented by archive data that include data from non-European missions. Aims. As part of SOLID, we present all available space-based SSI measurements, reference spectra, and relevant proxies in a unified format with regular temporal re-gridding, interpolation, gap-filling as well as associated uncertainty estimations. Methods. We apply a coherent methodology to all available SSI datasets. Our pipeline approach consists of the pre-processing of the data, the interpolation of missing data by utilizing the spectral coherency of SSI, the temporal re-gridding of the data, an instrumental outlier detection routine, and a proxy-based interpolation for missing and flagged values. In particular, to detect instrumental outliers, we combine an autoregressive model with proxy data. We independently estimate the precision and stability of each individual dataset and flag all changes due to processing in an accompanying quality mask. Results. We present a unified database of solar activity records with accompanying meta-data and uncertainties. Conclusions. This dataset can be used for further investigations of the long-term trend of solar activity and the construction of a homogeneous SSI record.
- Subjects :
- Atmospheric Science
010504 meteorology & atmospheric sciences
Computer science
Irradiance
Data analysis
Time series analysis
[SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology
lcsh:QC851-999
Solar irradiance
7. Clean energy
01 natural sciences
Proxy (climate)
0103 physical sciences
Statistics and probability
Time series
010303 astronomy & astrophysics
0105 earth and related environmental sciences
Remote sensing
[SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR]
Missing data
Autoregressive model
Solar spectrum
13. Climate action
Space and Planetary Science
Outlier
Anomaly detection
lcsh:Meteorology. Climatology
Algorithms
Subjects
Details
- Language :
- English
- ISSN :
- 21157251
- Volume :
- 6
- Database :
- OpenAIRE
- Journal :
- Journal of Space Weather and Space Climate
- Accession number :
- edsair.doi.dedup.....b8838816ec460ef4237ee1e4f14f69c7