The North Atlantic Waveguide and Downstream Impact Experiment

• Published in: Bulletin of the American Meteorological Society
• Main Authors: Schäfler, Andreas, Craig, Maxi, Wernli, Heini, Arbogast, Philippe, Doyle, James, Mctaggart-Cowan, Ron, Methven, John, Rivière, Gwendal, Ament, Felix, Boettcher, Maxi, Bramberger, Martin, Cazenave, Quitterie, Cotton, Richard, Crewell, Susanne, Delanoë, Julien, Dörnbrack, Andreas, Ehrlich, André, Ewald, Florian, Fix, Andreas, Grams, Christian M., Gray, Suzanne L., Grob, Hans, Gross, Silke, Hagen, Martin, Harvey, Ben, Hirsch, Lutz, Jacob, Marek, Kölling, Tobias, Konow, Heike, Lemmerz, Christian, Lux, Oliver, Magnusson, Linus, Mayer, Bernhard, Mech, Mario, Moore, Richard, Pelon, Jacques, Quinting, Julian, Rahm, Stephan, Rapp, Markus, Rautenhaus, Marc, Reitebuch, Oliver, Reynolds, Carolyn, Sodemann, Harald, Spengler, Thomas, Vaughan, Geraint, Wendisch, Manfred, Wirth, Martin, Witschas, Benjamin, Wolf, Kevin, Zinner, Tobias
• Other Authors: DLR Institut für Physik der Atmosphäre = DLR Institute of Atmospheric Physics (IPA), Deutsches Zentrum für Luft- und Raumfahrt Oberpfaffenhofen-Wessling (DLR), Ludwig Maximilian University Munich = Ludwig Maximilians Universität München (LMU), Institute for Atmospheric and Climate Science Zürich (IAC), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology Zürich (ETH Zürich), Centre national de recherches météorologiques (CNRM), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS), Naval Research Laboratory (NRL), Canadian Meteorological Centre (CMC), Environment and Climate Change Canada (ECCC), Department of Meteorology Reading, University of Reading (UOR), Laboratoire de Météorologie Dynamique (UMR 8539) (LMD), Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris, École normale supérieure - Paris (ENS-PSL), Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-École normale supérieure - Paris (ENS-PSL), Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL), Universität Hamburg (UHH), Max Planck Institute for Meteorology (MPI-M), Max-Planck-Gesellschaft, SPACE - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), United Kingdom Met Office Exeter, Institut für Geophysik und Meteorologie Köln (IGN), Universität zu Köln = University of Cologne, Leipziger Institut für Meteorologie (LIM), Leipzig University / Universität Leipzig, Max-Planck-Institut für Meteorologie (MPI-M), European Centre for Medium-Range Weather Forecasts (ECMWF), Norwegian Meteorological Institute Oslo (MET), TROPO - LATMOS, Monash University Clayton, Technische Universität Munchen - Technical University Munich - Université Technique de Munich (TUM), Geophysical Institute Bergen (GFI / BiU), University of Bergen (UiB), Bjerknes Centre for Climate Research (BCCR), Department of Biological Sciences Bergen (BIO / UiB), University of Bergen (UiB)-University of Bergen (UiB), National Centre for Atmospheric Science Manchester (NCAS), University of Manchester Manchester
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2018
• Subjects: [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology; [SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology; North Atlantic
• Online Access: https://insu.hal.science/insu-01760458; https://insu.hal.science/insu-01760458/document; https://insu.hal.science/insu-01760458/file/bams-d-17-0003_1.pdf; https://doi.org/10.1175/BAMS-D-17-0003.1

International audience Multi-aircraft and ground-based observations were made over the North Atlantic in fall 2016 to investigate the importance of diabatic processes for midlatitude weather.The North Atlantic Waveguide and Downstream Impact Experiment (NAWDEX) explored the impact of diabatic processes on disturbances of the jet stream and their influence on downstream high-impact weather through the deployment of four research aircraft, each with a sophisticated set of remote-sensing and in situ instruments, and coordinated with a suite of ground-based measurements. A total of 49 research flights were performed, including, for the first time, coordinated flights of the four aircraft; the German High Altitude and LOng Range Research Aircraft (HALO), the Deutsches Zentrum für Luft- und Raumfahrt (DLR) Dassault Falcon 20, the French Service des Avions Français Instrumentés pour la Recherche en Environnement (SAFIRE) Falcon 20, and the British Facility for Airborne Atmospheric Measurements (FAAM) BAe 146. The observation period from 17 Sep to 22 Oct 2016 with frequently occurring extratropical and tropical cyclones was ideal to investigate midlatitude weather over the North Atlantic. NAWDEX featured three sequences of upstream triggers of waveguide disturbances, their dynamic interaction with the jet stream, subsequent development, and eventual downstream weather impact on Europe. Examples are presented to highlight the wealth of phenomena that were sampled, the comprehensive coverage and the multi-faceted nature of the measurements. This unique dataset forms the basis for future case studies and detailed evaluations of weather and climate predictions to improve our understanding of diabatic influences on Rossby waves and downstream impact of weather systems affecting Europe.