[{"title":"Visibility and present weather observations from the high-Arctic ASCOS expedition 2008","summary":"Visibility data was collected using a Vaisala visibility sensor based on forward scattered laser light deployed on the aft starboard side on the 7th deck of the Icebreaker Oden. The visibility sensor is combined with a sensor that measures precipitation intensity and accumulated presentation, and generates the WMO present-weather synop code. The location of this sensor likely leads to an underestimation of precipitation.","citations":"Tjernstr\u00f6m, M. et al. 2014. The Arctic Summer Cloud Ocean Study (ASCOS): overview and experimental design. Atmospheric Chemistry and Physics, 14, 2823\u20132869. DOI:10.5194\/acp-14-2823-2014","comments":"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.\nThe 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\nThe visibility data from the Oden weather station is an intgral part of the weather station data file.Original address: http:\/\/www.ascos.se\/index.php?q=node\/274\n\n\nFiles:\nASCOS_Present_weather_data_FMI.xls (2.9 MB)\nFD12P_Present weather_codes_0.pdf (654.11 KB)\n\n","category":"Atmosphere","subcategory":"Weather observations","keywords":"ASCOS; Meteorology; High Arctic; Arctic boundary layer; Arctic clouds; Visibility; Precipitation; Weather","scientist":"Jussi Paatero","firstname":"Michael","lastname":"Tjernstr\u00f6m","address":"Department of Meteorology; Stockholm University","postalcode":"SE-106 91","city":"Stockholm","province":"","country":"Sweden","parameters":"Earth science > Atmosphere","location":"Ocean > Arctic Ocean","progress":"Completed","language":"English","project":"Arctic Summer Cloud-Ocean Study 2008 (Ascos)","publisher":"Bolin Centre Database","version":"1","constrains":"None","access":"Free"}]