Arctic Summer Cloud-Ocean Study
Visibility, precipitation and present weather
Two visibility sensor based on forward scattered laser light was deployed; one that comes with the Oden weather station and one that was deployed only during the ice drift. Both were deployed on the 7th deck; the weather station sensor on the roof of the starboard container and the FMI sensor on the aft starboard side. The Vaisala visibility sensor is combined with a sensor that also measures precipitation intensity and accumulated presentation, and generates the WMO present-weather synop code; hence the name. Note that the location of this sensor likely leeds to an unmderestimation of precipitation, since very light precipitation (droplets or ice crystals) are probly lofted by the flow distortion around the superstructure, often causing upwinds at this location The visibility data from the Oden weather station is an intgral part of the weather station data file.
Download
Photo of Vaisala present weather/visibility sensor in the background; note that the photo was taken during a different expedition