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then occur without any change of total heat in the climate system. Similarly, changes in the density of ocean water can also induce vertical motions, remembering that ocean density depends not only on temperature but also on salinity - warm, salty water can have the same density as cool, fresh water

two walkers were killed by lightning strikes in the Brecon Beacons. A vigorous depression in mid-July brought flooding across Perthshire with the town of Alyth particularly badly affected, and thunderstorms in mid-July also caused flash-flooding to parts of Hertfordshire, Cambridgeshire and Norfolk

). The wettest and driest observed locations for the year generally reflected the long-term climatology, with several rain-gauges in the Lake District, Snowdonia and West Highlands recording over 3000mm for the year, whereas parts of Kent, Essex and Cambridgeshire recorded around 450mm, typically around 80