Spectral UV Observation
Spectral UV observation overview
The intensity of harmful solar UV radiation reaching the earth's surface depends largely on concentrations of stratospheric ozone. Any increase in this intensity due to ozone depletion can adversely affect the ecosystem, which is adapted to the current UV environment.
Spectral UV observation using a Brewer spectrophotometer
Diurnal variation of the UV Index
Vertical axis: UV Index; horizontal axis: hours
UV observation pages
- Brewer Spectrophotometers
- Brewer Spectrophotometer Calibration and Observation Data
- Observation Data Archive: Hourly UV Index (JMA website; in Japanese)
- Near Real-Time UV Index Estimate (JMA website)