Innovative Strategies for Observations in the Arctic Atmospheric Boundary Layer (ISOBAR)-the Hailuoto 2017 campaign
2018
Kral, Stephan T. | Reuder, Joachim | Vihma, Timo | Suomi, Irene | O'Connor, Ewan | Kouznetsov, Rostislav | Wrenger, Burkhard | Rautenberg, Alexander | Urbancic, Gabin | Jonassen, Marius O. | Båserud, Line | Maronga, Björn | Mayer, Stephanie | Lorenz, Torge | Holtslag, Albert A.M. | Steeneveld, Gert J. | Seidl, Andrew | Müller, Martin | Lindenberg, Christian | Langohr, Carsten | Voss, Hendrik | Bange, Jens | Hundhausen, Marie | Hilsheimer, Philipp | Schygulla, Markus
The aim of the research project "Innovative Strategies for Observations in the Arctic Atmospheric Boundary Layer (ISOBAR)" is to substantially increase the understanding of the stable atmospheric boundary layer (SBL) through a combination of well-established and innovative observation methods as well as by models of different complexity. During three weeks in February 2017, a first field campaign was carried out over the sea ice of the Bothnian Bay in the vicinity of the Finnish island of Hailuoto. Observations were based on ground-based eddy-covariance (EC), automatic weather stations (AWS) and remote-sensing instrumentation as well as more than 150 flight missions by several different Unmanned Aerial Vehicles (UAVs) during mostly stable and very stable boundary layer conditions. The structure of the atmospheric boundary layer (ABL) and above could be resolved at a very high vertical resolution, especially close to the ground, by combining surface-based measurements with UAV observations, i.e., multicopter and fixed-wing profiles up to 200magl and 1800magl, respectively. Repeated multicopter profiles provided detailed information on the evolution of the SBL, in addition to the continuous SODAR and LIDAR wind measurements. The paper describes the campaign and the potential of the collected data set for future SBL research and focuses on both the UAV operations and the benefits of complementing established measurement methods by UAV measurements to enable SBL observations at an unprecedented spatial and temporal resolution.
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