John Prytherch Present weather sensor visibility and precipitation data from the Arctic Ocean 2018 expedition Bolin Centre for Climate Research, Stockholm University 2019 Datafile Atmosphere Weather observations Visibility Precipitation type Precipitation intensity Arctic Ocean 2018 AO2018 AO18 Meteorology Arctic boundary layer Arctic clouds High Arctic ACAS Earth science > Atmosphere John Prytherch 2019-07-22T13:48:17+00:00 English 1.0 None Data from the MISU Vaisala PWD22 present weather sensor, averaged over either 1 or 30-minute intervals. Three data formats are available: Matlab (.mat), NetCDF (.nc) and comma separated value (.csv) text, with an accompanying readme (.rtf) file. Visibility, up to a maximum range of 20km, air temperature and precipitation type and intensity determined by the Vaisala PWD22 present weather sensor installed above Oden’s bridge on the 7th deck, at a height of 27m above sea level. The system was operated as part of the Stockholm University ACAS project. The system additionally reports instantaneous, 15-minute and 60-minute WMO present weather codes. Until 2018-08-13 20:10, the sensor was set to only report visibility. After this date, the full set of measurements were reported. Data from the system are combined into a cruise-length file. The data are time-averaged to both 1-minute and 30-minute intervals, to correspond with the micrometeorological averaging periods used for the mast sensors.