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Can measurements of the near-infrared solar spectral irradiance be reconciled? A new ground-based assessment between 4000-10000 cm-1

Elsey, J; Coleman, M D; Gardiner, T; Shine, K P (2017) Can measurements of the near-infrared solar spectral irradiance be reconciled? A new ground-based assessment between 4000-10000 cm-1. Geophysical Research Letters, 44 (19). pp. 10071-10080.

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Abstract

The near-infrared solar spectral irradiance (SSI) is of vital importance for understanding of the Earth's radiation budget, and in Earth observation applications. There is a difference of ~10% between the commonly-used ATLAS3 solar spectrum and several other measurements in the spectral region 4000-10000 cm-1. The implications for the atmospheric sciences are significant, since this spectral region contains 25% of the incoming total solar irradiance. This work details an updated analysis of the CAVIAR SSI, featuring additional analysis techniques and an updated uncertainty budget using a Monte Carlo method. We report good consistency with ATLAS3 in the 7000-10000 cm-1 region where the calibration of ATLAS3 is more certain, but ~7% lower in the 4000-7000 cm-1 region, in general agreement with other analyses.

Item Type: Article
Keywords: solar irradience, FTIR, radiative calibration
Subjects: Environmental Measurement > Atmospheric Science, Emission and Security
Divisions: Chemical, Medical & Environmental Science
Identification number/DOI: 10.1002/2017GL073902
Last Modified: 08 Mar 2018 16:35
URI: http://eprintspublications.npl.co.uk/id/eprint/7803

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