in meteorology, radiation having a wavelength equal to or less than that of visible light

in meteorology, a term used loosely to distinguish radiation in the visible and near-visible portions of the electromagnetic spectrum (roughly 0.4 to 4.0 microns in wavelength) from longwave (terrestrial) radiation.

Shortwave radiation (SW) is a term used to describe the radiant energy in the visible (VIS), near-ultraviolet (UV), and near-infrared (NIR) wavelengths. The wavelength range is not always exactly defined, as there is no standard cut-off for the NIR. Shortwave radiation may be as broadly defined as between 0.1 and 5.0 micrometers) or as narrow as 0.2 to 3.0 micrometers, as there is little radiation flux (in terms of W/m^2) to the Earth's surface below 0.2 micrometers or above 3.0 micrometers (the photon flux, however, remains significant well to 6.0 micrometers, compared to the shorter wavelength fluxes).