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Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
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Review article
21 Nov 2016
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A revision of this discussion paper was accepted for the journal Atmospheric Chemistry and Physics (ACP) and is expected to appear here in due course.
The HD(CP)2 Observational Prototype Experiment HOPE – An Overview
Andreas Macke1, Patric Seifert1, Holger Baars1, Christoph Beekmans2, Andreas Behrendt3, Birger Bohn4, Johannes Bühl1, Susanne Crewell7, Thomas Damian8, Hartwig Deneke1, Sebastian Düsing1, Andreas Foth9, Paolo Di Girolamo10, Eva Hammann3, Rieke Heinze5,6, Anne Hirsikko4,13, John Kalisch1,11, Norbert Kalthoff8, Stefan Kinne5, Martin Kohler8, Ulrich Löhnert7, Bomidi Lakshmi Madhavan1,14, Vera Maurer8, Shravan Kumar Muppa3, Jan Schween7, Ilya Serikov5, Holger Siebert1, Clemens Simmer2, Florian Späth3, Sandra Steinke7, Katja Träumner8,12, Birgit Wehner1, Andreas Wieser8, Volker Wulfmeyer3, and Xinxin Xie2 1Leibniz Institute for Tropospheric Research (TROPOS), Leipzig, Germany
2Meteorological Institute, University of Bonn, Bonn, Germany
3Institute of Physics and Meteorology (IPM), University of Hohenheim, Stuttgart, Germany
4Institute of Energy and Climate Research (IEK-8), Forschungszentrum Jülich GmbH (FZJ), Jülich, Germany
5Max-Planck-Institut für Meteorologie (MPIM), Hamburg, Germany
6Institut für Meteorologie und Klimatologie, Leibniz Universität Hannover, Hannover, Germany
7Institute for Geophysics and Meteorology (IGMK), University of Cologne, Cologne, Germany
8Institute of Meteorology and Climate Research – Troposphere Research (IMK-TRO), Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
9Leipzig Institute of Meteorology, University of Leipzig, Leipzig, Germany
10Scuola di Ingegneria, Università degli Studi della Basilicata, Potenza, Italy
11Department of Energy and Semiconductor Research, Institute of Physics – Oldenburg University, Oldenburg, Germany
12NDT Global GmbH & Co. KG, Stutensee, Germany
13Finnish Meteorological Institute, Helsinki, Finland
14Department of Marine Sciences, Goa University, Goa, India
Abstract. The "HD(CP)2 Observational Prototype Experiment" (HOPE) was executed as a major 2-month field experiment in Jülich, Germany, performed in April and May 2013, followed by a smaller campaign in Melpitz, Germany in September 2013. HOPE has been designed to provide a critical evaluation of the new German community atmospheric Icosahedral non-hydrostatic (ICON) model at the scale of the model simulations and further to provide information on land-surface-atmospheric boundary layer exchange, cloud and precipitation processes as well as on sub-grid variability and microphysical properties that are subject to parameterizations. HOPE focuses on the onset of clouds and precipitation in the convective atmospheric boundary layer. The paper summarizes the instrument set-ups, the intensive observation periods as well as example results from both campaigns.

HOPE-Jülich instrumentation included a radio sounding station, 4 Doppler lidars, 4 Raman lidars (3, 3, and 4 of these provide temperature, water vapor, and particle backscatter data, respectively), 1 water vapour differential absorption lidar, 3 cloud radars, 5 microwave radiometers, 3 rain radars, 6 sky imagers, 99 pyranometers, and 5 Sun photometers operated in synergy at different supersites. The HOPE-Melpitz campaign combined ground-based remote sensing of aerosols and clouds with helicopter- and balloon-based in-situ observations in the atmospheric column and at the surface.

HOPE provided an unprecedented collection of atmospheric dynamical, thermodynamical, and micro- and macrophysical properties of aerosols, clouds and precipitation with high spatial and temporal resolution within a cube of approximately 10 × 10 × 10 km3. HOPE data will significantly contribute to our understanding of boundary layer dynamics and the formation of clouds and precipitation. The datasets are made available through a dedicated data portal.

Citation: Macke, A., Seifert, P., Baars, H., Beekmans, C., Behrendt, A., Bohn, B., Bühl, J., Crewell, S., Damian, T., Deneke, H., Düsing, S., Foth, A., Di Girolamo, P., Hammann, E., Heinze, R., Hirsikko, A., Kalisch, J., Kalthoff, N., Kinne, S., Kohler, M., Löhnert, U., Madhavan, B. L., Maurer, V., Muppa, S. K., Schween, J., Serikov, I., Siebert, H., Simmer, C., Späth, F., Steinke, S., Träumner, K., Wehner, B., Wieser, A., Wulfmeyer, V., and Xie, X.: The HD(CP)2 Observational Prototype Experiment HOPE – An Overview, Atmos. Chem. Phys. Discuss., doi:10.5194/acp-2016-990, in review, 2016.
Andreas Macke et al.
Andreas Macke et al.


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Short summary
This article provides an overview of the instrumental setup and the main results obtained during the two HD(CP)2 observational prototype experiments HOPE-Jülich and HOPE-Melpitz conducted in Germany in April–May and September 2013, respectively. Main goal of the field experiments was to provide high-resolution observational datasets for both, improving the understaning of boundary layer and cloud processes, as well as for the evaluation of a new model that is run at 156-m horizontal resolution.
This article provides an overview of the instrumental setup and the main results obtained during...