15 Jun 2021

15 Jun 2021

Review status: this preprint is currently under review for the journal ESSD.


Heike Konow1,2, Florian Ewald3, Geet George2,4, Marek Jacob5, Marcus Klingebiel6,2, Tobias Kölling2,7, Anna E. Luebke6, Theresa Mieslinger1,4, Veronika Pörtge7, Jule Radtke1,4, Michael Schäfer6, Hauke Schulz2,4, Raphaela Vogel8, Martin Wirth3, Sandrine Bony8, Susanne Crewell5, André Ehrlich6, Linda Forster7, Andreas Giez9, Felix Gödde7, Silke Groß3, Manuel Gutleben3,7, Martin Hagen3, Lutz Hirsch2, Friedhelm Jansen2, Theresa Lang1,4, Bernhard Mayer7, Mario Mech5, Marc Prange1,4, Sabrina Schnitt5, Jessica Vial8, Andreas Walbröl5, Manfred Wendisch6, Kevin Wolf6,10, Tobias Zinner7, Martin Zöger9, Felix Ament1,2, and Bjorn Stevens2 Heike Konow et al.
  • 1Universität Hamburg, Hamburg, Germany
  • 2Max Planck Institute for Meteorology, Hamburg, Germany
  • 3Deutsches Zentrum für Luft- und Raumfahrt, Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany
  • 4International Max Planck Research School on Earth System Modelling, Max Planck Institute for Meteorology, Hamburg, Germany
  • 5Institute for Geophysics and Meteorology, University of Cologne, Cologne, Germany
  • 6Leipzig Institute for Meteorology, University of Leipzig, Leipzig, Germany
  • 7Ludwig Maximilians Universität, Meteorologisches Institut, Munich, Germany
  • 8LMD/IPSL, CNRS, Sorbonne University, Paris, France
  • 9Deutsches Zentrum für Luft- und Raumfahrt, Flugexperimente, Oberpfaffenhofen, Germany
  • 10Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder, Colorado

Abstract. As part of the EUREC4A field campaign, the German research aircraft HALO, configured as a cloud observatory, conducted 15 research flights in the trade wind region east of Barbados in January and February 2020. Narrative text, aircraft state data, and meta data describing HALO's operation during the campaign are provided. Each HALO research flight is segmented by time-stamp intervals into standard elements to aid the consistent analysis of the flight data. Photographs from HALO's cabin and animated satellite images synchronized with flight tracks are provided to visually document flight conditions. As a comprehensive product from the remote sensing observations, a multi-sensor cloud mask product is derived and quantifies the incidence of clouds observed during the flights. In addition, to lower the threshold for new users of HALO's data, a collection of use cases is compiled into an online book "How to EUREC4A", included as an asset with this paper. This online book provides easy access to most of EUREC4A's  HALO data through an intake catalogue.

Heike Konow et al.

Status: open (until 10 Aug 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2021-193', Anonymous Referee #1, 05 Jul 2021 reply
  • RC2: 'Comment on essd-2021-193', Anonymous Referee #2, 07 Jul 2021 reply
  • RC3: 'Comment on essd-2021-193', Anonymous Referee #3, 25 Jul 2021 reply

Heike Konow et al.

Data sets

How to EUREC4A The EUREC4A community

Cloud top height derived from airborne measurements with the WALES lidar during the EUREC4A field campaign Wirth, M.

Cloud mask derived from airborne KT19 measurements during the EUREC4A field campaign. Schäfer, M., Ehrlich, A., Luebke, A., Thoböll, J., Wolf, K., & Wendisch, M.

Two-dimensional cloud mask and cloud fraction with 1 Hz temporal resolution derived from VELOX during the EUREC4A field campaign. Schäfer, M., Ehrlich, A., Luebke, A., Thoböll, J., Wolf, K., & Wendisch, M.

Cloud mask and cloud fraction derived from solar reflectivity measurements of the imaging spectrometer specMACS on HALO during the EUREC4A field campaign Pörtge, V., Goedde, F., Kölling, T., Zinner, T., Forster, L., & Mayer, B.

Cloud mask derived from airborne HAMP Cloud Radar measurements during the EUREC4A field campaign. Jacob, M.

EUREC4A GOES-16 ABI overview movies (VIS+IR) Schulz, H., Touzé-Peiffer, L., & Fildier, B.

Cloud mask derived from airborne HAMP Microwave Radiometer measurements during the EUREC4A field campaign Jacob, M.

Instruments on HALO during EUREC4A, references and contact points Kölling, T., Ament, F., Bony, S., Ehrlich, A., Ewald, F., George, G., Giez, A., Hirsch, L., Jacob, M., Konow, H., Mayer, B., Pörtge, V., Schäfer, M., Stevens, B., Wendisch, M., Wirth, M., Wolf, K., & Zinner, T.

Position and attitude data from the DLR BAHAMAS instrument during the EUREC4A Field Campaign Klingebiel, M.

Photographs taken from the HALO aircraft during the EUREC4A field campaign Konow, H., Ament, F., Bony, S., Forster, L., George, G., Groß, S., Jacob, M., Kölling, T., Mayer, B., Mech, M., Schnitt, S., Stevens, B., Vial, J., Vogel, R., & Wendisch, M.

EUREC4A: HALO flight phase separation: Beautiful Budgie Marc Prange, Max Ringel, Geet George, Lutz Hirsch, Tobias Kölling, Heike Konow, Theresa Lang, Theresa Mieslinger, Robert Pincus, Leo Saffin

Heike Konow et al.


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Short summary
The German research aircraft HALO took part in the research campaign EUREC4A in January and February 2020. The focus area was the tropical Atlantic east of the island of Barbados. We describe the characteristics of the 15 research flights, provide auxiliary information, derive a combined cloud mask products from all instruments that observe clouds on board the aircraft, and provide code examples that help new users of the data to get started.