Solar Irradiance

November 2019

August 2017

March 2017

A solar irradiance dataset based on the NRLSSI2 model (Lean and Woods, 2010) has been implemented -- we recommend that users use this implementation. NRLSSI2 models solar variability, and AER's extract_solar package, used in conjunction with LBLRTM, now allows a number of options to handle variability consistent with NRLSSI2. To this end, extract_solar now includes a new database that consists of three components: These latter two terms are stored for average solar activity conditions for Solar Cycles 13-24 (from NRLSSI2).

The extract_solar package also has a database that consists of the sum of these three components. We recommend that users not interested in solar variability use the option that is based on this combined database. extract_solar can generate a binary (SOLAR.RAD) or ascii file that utilizes this combined database. Alternatively, the code will extract (in binary or ascii) all three of the individual components, which can be combined in multiple ways when running LBLRTM (see extract_solar and LBLRTM instructions).

The code retains its previous capability to generate a binary or ascii file based on the high-resolution Kurucz database (50-50000 cm-1) (Kurucz, 1992).
May 2004

The solar source function is described in: Kurucz, R.L., Synthetic infrared spectra, in Infrared Solar Physics, IAU Symp. 154, edited by D.M. Rabin and J.T. Jefferies, Kluwer, Acad., Norwell, MA, 1992.
Atmospheric and Environmental Research