Inclined Lidar observations of boundary layer aerosol particles above the Kongsfjord, Svalbard

Abstract

A lidar system was used as a link between the observatory at the ridge of Zeppelin Mountain (475 m asl) and the observatories at sea level in Ny-？lesund, Svalbard. We report on the observation of aerosol layers directly above the Kongsfjord for two particular days, 29 April and 1 May 2007. On 29 April 2007, a layer of enhanced backscatter was observed in the lowest 25 m above the water surface from 10:00 until 13:00 UTC. The depolarization was low, indicating spherical particles like hydrated aerosol or water droplets. In the afternoon, this layer disappeared. The particle concentration at Zeppelin station was low all day (around 250 cm-3 for particles with diameter bigger than 10 nm, around 300 cm-3 for particles larger than 3 nm). At Corbel station (sea level, near the Kongsfjord), a similar concentration of particles larger than 2.5 nm was monitored.Kongsfjord for two particular days, 29 April and 1 May 2007. On 29 April 2007, a layer of enhanced backscatter was observed in the lowest 25 m above the water surface from 10:00 until 13:00 UTC. The depolarization was low, indicating spherical particles like hydrated aerosol or water droplets. In the afternoon, this layer disappeared. The particle concentration at Zeppelin station was low all day (around 250 cm-3 for particles with diameter bigger than 10 nm, around 300 cm-3 for particles larger than 3 nm). At Corbel station (sea level, near the Kongsfjord), a similar concentration of particles larger than 2.5 nm was monitored.