Sustained ocean observations are essential for understanding links between physical and chemical drivers and ecosystem responses and for investigations into how long-term changes in the underlying drivers might impact on ecosystem dynamics and the services these provide. However, the management of time series is complex and many issues from scientific to financial and scoietal, need to be taken into account for time series to be sustainable in the long-term. Therefore, while many time series courses have a focus on statistical techniques needed to analyse time series,  in this course we take a holistic approach. We will introduce you to different types of time series and will show you different tools for the visualisation and exploration of your time series data (both very important for detecting time series and for deciding on the correct statistical analyses). However, we will also discuss time series in the context of the ecosystem services context and policy drivers that can have an influence on how time series are run.