<ul><li>A climate data manager is preparing a high quality homogenised set of data</li><br /></p><p></ul><br /></p><p><ul><li>He views the time-series distribution of observation ‘values’ for a set of stations for specific phenomena and identifies step changes in the distribution of the data at specific time intervals</li><br /></p><p></ul><br /></p><p><ul><li>He investigates the <b>observations metadata</b> associated with each station / sensor, and attempts to identify a cause of the step changes in values. These may possibly have been caused by a station relocation, a changed sensor, changed operating procedure etc. </li><br /></p><p></ul><br /></p>