Wind and backscatter profiles measured by a wind lidar during POLARSTERN cruise PS109 (ARK-XXXI/4)

• Main Authors: Zentek, Rolf, Preußer, Andreas, Heinemann, Günther
• Format: Dataset
• Language: English
• Published: PANGAEA 2019
• Subjects: Arctic; ARK-XXXI/4; Backscatter; CATS; CATS - The Changing Arctic Transpolar System; DATE/TIME; Doppler Wind-LiDAR; Doppler wind lidar; Halo Photonics; Stream Line [ship born]; Fit deviation; LATITUDE; Lidar; LONGITUDE; Optical backscattering coefficient; Polarstern; PS109; PS109_0_underway-8; Ship-based wind lidar measurements of the Arctic boundary layer; SWIARC-YOPP; wind direction; wind lidar; wind speed; W-LiDAR; Year of Polar Prediction; YOPP; Berichte zur Polar- und Meeresforschung; Reports on Polar and Marine Research
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.902805; https://doi.org/10.1594/PANGAEA.902805

This data set includes vertical profiles of wind speed (FF), wind direction (DD), fit deviation (FD) and the backscatter confident (BB) measured by a ship born wind lidar. The definition of the fit deviation, the main processing of the lidar data and an evaluation of the measurements is described in Zentek et al. (2018; doi:10.5194/amt-11-5781-2018 ). For this data set winds were computed every 50 m up to 1000 m and the data is averaged over time. The averaging time is one hour (+-30min around each full hour) and missing values are removed. A weighted arithmetic mean was used for the u- and v-component as well as for the fit deviation with the weights "1/fit deviation". The backscatter coefficient was averaged without weights. As backscatter was always measured, hours were included even if no wind could be computed due to atmospheric conditions but hours with no reliable data were excluded (e.g. the lidar was turned off; the ship was rocking to hard; etc.). Further detailed information for this measurement campaign: number of rays per VAD [6-8], averaging time [3-8 sec], chosen SNR threshold [-19 dB].