High resolution aircraft measurements on three days over Wijdefjorden, Svalbard during the STABLE campaign in March 2013

• Main Authors: Michaelis, Janosch, Hartmann, Jörg, Schmitt, Amelie U, Birnbaum, Gerit, Vihma, Timo, Lüpkes, Christof
• Format: Other/Unknown Material
• Language: English
• Published: PANGAEA 2023
• Subjects: AC3; airborne measurements; Arctic Amplification; atmospheric boundary layer; convection; fjords; orographic effects; Polynya; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; Sea ice; SPP1158; topography; turbulence; Arctic; Antarctic; Svalbard; Longyearbyen; Wijdefjorden; Antarc*; Polar Research; The Cryosphere; Wijdefjord*; Spitsbergen
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.961263; https://doi.org/10.1594/PANGAEA.961263

The data set consists of high resolution airborne measurements that were obtained mainly over Svalbard and near the sea ice edge north of Svalbard on three days in March 2013 during the campaign "SpringTime Atmospheric Boundary Layer Experiment (STABLE). STABLE was led by the Alfred Wegener Institue (AWI) and by the Finnish Meteorological Institute (FMI). The measurements were performed using the POLAR 5 research aircraft, where all research flights of 5-6 hours duration started and ended at Longyearbyen airport. During STABLE, observations focused on the vertical structure of the lower troposphere as well as boundary layer modifications, e.g. during marine cold-air outbreaks and by convection over leads in sea ice. The data set presented here predominantly consists of measurements that were obtained over the Wijdefjorden, which is a North-South oriented fjord with a length of more than 100km in the northern part of Spitsbergen. The measurements were carried out to study the boundary layer structure in the fjord as well as for analyses of the role of the topography on the atmospheric conditions. In its southern part, the fjord was covered by land-fast sea ice until about 72.5km north of the fjord's head. In its northern part, there was open water. On all three days, the corresponding flight patterns mainly consisted of vertical aircraft profiles between 30m and 1000-1500m height during saw-tooth patterns and of low- and high-level horizontal flight legs from the marginal ice zone towards the fjord and vice versa. Each file consists of measurements from one flight leg, where in each file name we include start and end time (in UTC) and the following abbreviations: • h: low-level horizontal flight leg (below 1000m flight altitude) • H: high-level horizontal flight leg (above 1000m flight altitude) • t: ascent or descent with an altitude difference <1500m • T: ascent or descent with an altitude difference >1500m (or ascent/descent at high altitudes) The airborne measurements were obtained by instruments ...