Correlations Between Total Solar Irradiance and Spectral Irradiances Using SORCE Measurements

The SOlar Radiation and Climate Experiment (SORCE) was launched in January 2003 to measure both total solar irradiance (TSI) and spectral solar irradiance (SSI). The available spectral irradiances are contiguous from 115 nm to 1600 nm with nearly daily coverage, providing useful inputs to climate models since the Earth's atmospheric response is highly wavelength dependent. By correlating these relatively recent and short-duration spectral irradiances with simultaneous SORCE TSI measurements, the SSI may be linked to the nearly 3- decade long TSI record. Extending this SSI proxy via the TSI record may provide an estimate of historical spectral irradiances allowing comparisons to past climate. I present results from these wavelength-dependent correlations between SORCE TSI and SSI measurements.