Lagrangian matches between observations from aircraft, lidar and radar in a warm conveyor belt crossing orography ...

• Main Authors: Boettcher, Maxi, Schäfler, Andreas, Sprenger, Michael, Sodemann, Harald, Kaufmann, Stefan, Voigt, Christiane, Schlager, Hans, Summa, Donato, Di Girolamo, Paolo, Nerini, Daniele, Germann, Urs, Wernli, Heini
• Format: Article in Journal/Newspaper
• Language: English
• Published: ETH Zurich 2021
• Subjects: North Atlantic
• Online Access: https://dx.doi.org/10.3929/ethz-b-000479170; http://hdl.handle.net/20.500.11850/479170

Warm conveyor belts (WCBs) are important airstreams in extratropical cyclones, often leading to the formation of intense precipitation and the amplification of upper-level ridges. This study presents a case study that involves aircraft, lidar and radar observations in a WCB ascending from western Europe towards the Baltic Sea during the Hydrological Cycle in the Mediterranean Experiment (HyMeX) and T-NAWDEX-Falcon in October 2012, a preparatory campaign for the THORPEX North Atlantic Waveguide and Downstream Impact Experiment (T-NAWDEX). Trajectories were used to link different observations along the WCB, that is, to establish so-called Lagrangian matches between observations. To this aim, an ensemble of wind fields from the global analyses produced by the European Centre for Medium-Range Weather Forecasts (ECMWF) Ensemble of Data Assimilations (EDA) system were used, which allowed for a probabilistic quantification of the WCB occurrence and the Lagrangian matches. Despite severe air traffic limitations for ... : Atmospheric Chemistry and Physics, 21 (7) ...