Surface topography and snow depth measured during the ALERT2018 campaign (MAP Last Ice) at station ALERT2018_23 ...

• Main Authors: Anhaus, Philipp, Katlein, Christian, Jutila, Arttu, Haas, Christian
• Format: Dataset
• Language: English
• Published: PANGAEA 2021
• Subjects: Distance, relative, X; Distance, relative, Y; Surface topography, relative; Snow thickness; Multiple investigations; TLS VZ-400i, RIEGL, Horn, Austria; Calculated; ALERT2018; Sampling on land; Lincoln Sea; Nunavut
• Online Access: https://dx.doi.org/10.1594/pangaea.932599; https://doi.pangaea.de/10.1594/PANGAEA.932599

Measurements of surface topography have been performed using a Terrestrial Laser Scanner (VZ-400i, RIEGL, Horn, Austria) on First-Year-Ice during the ALERT2018 campaign (Multidisciplinary Arctic Program (MAP) - Last Ice) off Alert, Nunavut, Canada in the Lincoln Sea in May 2018. The scans were performed across an approx. 100 times 100 m wide patch. The laser scanner was mounted on a tripod approx. 2 m above the surface and had a wavelength of 1550 nm. The scan pattern “panorama 20” with an angular resolution of 0.02 degree and a scan time of 180 s was used. At 20 m this corresponds to a 0.7 cm and at 50 m to a 1.7 cm horizontal resolution. A laser pulse repetition rate of 1200 kHz with a maximum measurement range of 250 m was used. Due to the snow conditions and the laser wavelength, a maximum range of only about 100 m was achieved. The roll and pitch accuracy of the laser scanner ranged from 0.009 to 0.014 degree which translates into a 1.57 cm to 2.44 cm vertical error per 100 m distance. For further ...