Satellites are a vital tool for monitoring the climate and how it can affect weather seasons, leading to phenomena such as the "El Nino". This is useful for forecasting potential weather systems.
Copernicus Sentinel-3's OLCI and SLSTR instruments provide data for climate modelling and impact studies. The ALT instument supports Climate & Seasonal Forecasting, and the mission also undertaks monitoring of river and lake levels, and contributes to flood monitoring studies. More on Sentinel-3's marine monitoring applications can be found in the OLCI and SLSTR User Guides.