Aircraft measurements of the boundary layer structure over Nares Strait (Greenland) during campaign IKAPOS with POLAR 5 on 2010-06-15 ...

• Main Author: Heinemann, Günther
• Format: Dataset
• Language: unknown
• Published: PANGAEA 2024
• Subjects: aircraft; atmospheric boundary layer; Nares Strait; Event label; Date/Time of event; Date/Time of event 2; Latitude of event; Longitude of event; Latitude of event 2; Longitude of event 2; Text file; Aircraft; IKAPOS; POLAR 5; Alfred Wegener Institute; Greenland; Nares strait
• Online Access: https://dx.doi.org/10.1594/pangaea.965816; https://doi.pangaea.de/10.1594/PANGAEA.965816

Gap flows and the stable boundary layer were studied in northwest Greenland during the aircraft-based experiment IKAPOS (Investigation of Katabatic winds and Polynyas during Summer) in June 2010. The measurements were performed using the research aircraft POLAR 5 of Alfred Wegener Institute (AWI, Bremerhaven, Wesche et al. 2016). Besides navigational and basic meteorological instrumentation, the aircraft was equipped with radiation and surface temperature sensors and with a turbulence measurement system. The calibration procedure is described in Drüe and Heinemann (2013). A detailed description of the experimental setup, the flight missions and the aircraft sensors are given in the field phase report (Heinemann et al. 2011) and in Heinemann (2018). The vertical profiles were flown as slantwise aircraft profiles (ascents or descents). The data were measured at a sampling rate of 100 Hz. For the profiles, a more convenient 1 Hz subset was extracted from the 100 Hz data set and turbulent fluctuations are ... : Data description:hradh = radar height above ground in m (should be used in general)hgps = gps height in m (should be used when hrad is not available)xkor = horizontal coordinate (distance from start point in km)T = temperature in °CTh = potential temperature in °Cq = specific humidity in g/kgu= wind u-component in m/sv = wind v-component in m/sff = wind speed in m/sdd = wind direction in ° (range -60° to 300°, because winds were generally northerly)dudz = vertical gradient of the u-component in 1/sdvdz = vertical gradient of the v-component in 1/sdthdz = vertical gradient of the potential temperature in K/mRi10m = Gradient Richardson numberRB = Bulk Richardson number with respect to the lowest levelGradients were computed for 10m height differences (5m below 60m)-----The data are consecutive vertical profiles flown between the waypoints. Each profile has a separate header:Number of values of the profile (n)Mean latitude and longitude of the profile (lat, lon)Distance from start point in km for the begin and ...