Clear Sky Spatial Distribution of Solar Ultraviolet-B Radiance

Ultraviolet Sky Radiance Distributions of Translucent Overcast Skies

The diffuse sky radiation component in the ultraviolet wavelengths is often at least 50% of the global irradiance under clear skies, and is the dominant component of ultraviolet global radiation under translucent overcast skies. The distribution of sky radiance was measured in a rural area and modeled for wavelength bands of ultraviolet-B (UVB, 280-320 nm) and ultraviolet-A (UVA, 320-400 nm). S...

A clear-sky radiance archive from Meteosat ”water vapor” observations

Oceanic impacts on ultraviolet radiance

Oceanic phytoplankton, atmospheric aerosol and Raman scattering impacts on space-based ultraviolet radiance measurements R.-M. Hu and R. S. Sokhi Centre for Atmospheric and Instrumentation Research (CAIR), University of Hertfordshire, College Lane, Hatfield, Herts AL109AB, UK Received: 31 July 2007 – Accepted: 29 September 2007 – Published: 9 October 2007 Correspondence to: R.-M. Hu (r.hu@herts...

Contribution of water vapor dimers to clear sky absorption of solar radiation

Using recently derived-values of the water vapor dimer spectral absorption cross section we calculate the water vapor dimer contribution to the clear sky absorption of solar radiation. We consider the water dimer concentrations deduced from local equilibrium thermodynamics, and we account for the overlap of water vapor dimer and monomer absorption bands. We estimate that water vapor dimer contr...

On the angular effect of residual clouds and aerosols in clear-sky infrared window radiance observations: Sensitivity analyses

[1] Accurate environmental satellite observations and calculations of top-of-atmosphere infrared (IR) spectral radiances are required for the accurate retrieval of environmental data records (EDRs), including atmospheric vertical temperature and moisture profiles. For this reason it is important that systematic differences between observations and calculations under well-characterized condition...