The Penlee Point Atmospheric Observatory (PPAO) was established by the Plymouth Marine Laboratory in May 2014 for long term observations of ocean-atmosphere interaction. The observatory is only a few tens of metres away from the water edge and 11m above mean sea level. Meteorological data is provided by a Gill MetConnect THP weather station with tipping bucket rain gauge. Wind speed and direction are provided by a Gill Windmaster Pro high-precision 3-D ultrasonic anemometer.