The Historical Climate — Shortwave Radiation indicator shows the historical trend of daily cumulative shortwave (solar) radiation reaching the Earth's surface. This is the primary energy source for photosynthesis, evapotranspiration, and all processes driving ecosystem energy balance.
Solar radiation varies with latitude, season, cloud cover, and atmospheric composition. Long-term trends may indicate changes in air quality or cloud dynamics.
Data come from the Open-Meteo Historical Weather API. The variable used is shortwave_radiation_sum (daily cumulative solar radiation). Data are interpolated to the site's position.
| Code | Name | Provider | Type | Coverage | Availability |
|---|---|---|---|---|---|
WRD_OPNMT_99 | Open-Meteo Historical Weather | Open-Meteo | db | Global | 1940 - present |
Historical trend of daily cumulative shortwave solar radiation. Open-Meteo variable: shortwave_radiation_sum. Source: Open-Meteo Historical Weather API. Unit: MJ/m².