Solar extreme-ultraviolet irradiance for general circulation models

Solar Irradiance Conversion Models*

The Solar Extreme Ultraviolet Monitor for MAVEN

The Extreme Ultraviolet (EUV) monitor is an instrument on the NASA Mars Atmosphere and Volatile EvolutioN (MAVEN) mission, designed to measure the variability of the solar soft x-rays and EUV irradiance at Mars. The solar output in this wavelength range is a primary energy input to the Mars atmosphere and a driver for the processes leading to atmospheric escape. The MAVEN EUV monitor consists o...

Solar ultraviolet irradiance and cancer incidence and mortality.

Evidence supporting the UVB/vitamin D/cancer theory continues to mount with little detraction, although there are some inconsistent results, such as some from Nordic countries, with respect to serum calcidiol levels. Also, studies designed and conducted before it was realized that dietary sources are largely inadequate to have a pronounced effect on cancer risk were largely unable to confirm a ...

Creation of a Composite Solar Ultraviolet Irradiance Data Set

Characterization of long-term solar ultraviolet (UV) irradiance variations is important for understanding the radiative forcing of Earth’s atmosphere. Extending such a characterization to multidecadal time scales requires the merging of multiple satellite data sets. Currently available irradiance data sets show both absolute offsets and time-dependent differences that vary between spectral rang...

Experimental comparison of extreme-ultraviolet multilayers for solar physics.

We compare the reflectance and stability of multilayers comprising either Si/Mo, Si/Mo2C, Si/B4C, Si/C, or Si/SiC bilayers, designed for use as extreme-ultraviolet (EUV) reflective coatings. The films were deposited by using magnetron sputtering and characterized by both x-ray and EUV reflectometry. We find that the new Si/SiC multilayer offers the greatest spectral selectivity at the longer wa...