Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
Atmos. Chem. Phys., 17, 4887-4914, 2017
© Author(s) 2017. This work is distributed
under the Creative Commons Attribution 3.0 License.
Review article
13 Apr 2017
The HD(CP)2 Observational Prototype Experiment (HOPE) – an overview
Andreas Macke1, Patric Seifert1, Holger Baars1, Christian Barthlott2, Christoph Beekmans3, Andreas Behrendt4, Birger Bohn5, Matthias Brueck6, Johannes Bühl1, Susanne Crewell8, Thomas Damian2, Hartwig Deneke1, Sebastian Düsing9, Andreas Foth10, Paolo Di Girolamo11, Eva Hammann4, Rieke Heinze6,7, Anne Hirsikko5,14, John Kalisch1,12, Norbert Kalthoff2, Stefan Kinne6, Martin Kohler2, Ulrich Löhnert8, Bomidi Lakshmi Madhavan1,15, Vera Maurer2,16, Shravan Kumar Muppa4, Jan Schween8, Ilya Serikov6, Holger Siebert9, Clemens Simmer3, Florian Späth4, Sandra Steinke8, Katja Träumner2,13, Silke Trömel3, Birgit Wehner9, Andreas Wieser2, Volker Wulfmeyer4, and Xinxin Xie3 1Department of remote sensing of atmospheric processes, Leibniz Institute for Tropospheric Research (TROPOS), Leipzig, Germany
2Institute of Meteorology and Climate Research – Troposphere Research (IMK-TRO), Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
3Meteorological Institute, University of Bonn, Bonn, Germany
4Institute of Physics and Meteorology (IPM), University of Hohenheim, Stuttgart, Germany
5Institute of Energy and Climate Research (IEK-8), Forschungszentrum Jülich GmbH (FZJ), Jülich, Germany
6Atmosphere in the Earth System Department, Max-Planck-Institute for Meteorology (MPI-M), Hamburg, Germany
7Institut für Meteorologie und Klimatologie, Leibniz University of Hanover, Hanover, Germany
8Institute for Geophysics and Meteorology (IGMK), University of Cologne, Cologne, Germany
9Department of Experimental Aerosol and Cloud Microphysics, Leibniz Institute for Tropospheric Research (TROPOS), Leipzig, Germany
10Leipzig Institute for Meteorology, University of Leipzig, Leipzig, Germany
11Scuola di Ingegneria, Università degli Studi della Basilicata, Potenza, Italy
12Department of Energy and Semiconductor Research, Institute of Physics, Oldenburg University, Oldenburg, Germany
13NDT Global GmbH & Co. KG, Stutensee, Germany
14Atmospheric Composition Unit, Finnish Meteorological Institute (FMI), Helsinki, Finland
15Department of Marine Sciences, Goa University, Goa, India
16Climate and Environment Consultancy (KU1), German Weather Service (DWD), Offenbach, Germany
Abstract. The HD(CP)2 Observational Prototype Experiment (HOPE) was performed as a major 2-month field experiment in Jülich, Germany, in April and May 2013, followed by a smaller campaign in Melpitz, Germany, in September 2013. HOPE has been designed to provide an observational dataset for 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 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. This paper summarizes the instrument set-ups, the intensive observation periods, and example results from both campaigns.

HOPE-Jülich instrumentation included a radio sounding station, 4 Doppler lidars, 4 Raman lidars (3 of them provide temperature, 3 of them water vapour, and all of them particle backscatter data), 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 at different sites, some of them in synergy. 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 have been made available through a dedicated data portal.

First applications of HOPE data for model evaluation have shown a general agreement between observed and modelled boundary layer height, turbulence characteristics, and cloud coverage, but they also point to significant differences that deserve further investigations from both the observational and the modelling perspective.

Citation: Macke, A., Seifert, P., Baars, H., Barthlott, C., Beekmans, C., Behrendt, A., Bohn, B., Brueck, M., 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., Trömel, S., Wehner, B., Wieser, A., Wulfmeyer, V., and Xie, X.: The HD(CP)2 Observational Prototype Experiment (HOPE) – an overview, Atmos. Chem. Phys., 17, 4887-4914, doi:10.5194/acp-17-4887-2017, 2017.
Publications Copernicus
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 Sept 2013, respectively. 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 the new ICON model that is run at 156 m horizontal resolution.
This article provides an overview of the instrumental setup and the main results obtained during...