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Discussion papers
https://doi.org/10.5194/essd-2019-96
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/essd-2019-96
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Data description paper 14 Jun 2019

Data description paper | 14 Jun 2019

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This discussion paper is a preprint. It is a manuscript under review for the journal Earth System Science Data (ESSD).

A comprehensive in situ and remote sensing data set from the Arctic CLoud Observations Using airborne measurements during polar Day (ACLOUD) campaign

André Ehrlich1, Manfred Wendisch1, Christof Lüpkes2, Matthias Buschmann3, Heiko Bozem4, Dmitri Chechin2, Hans-Christian Clemen5, Régis Dupuy6, Olliver Eppers4,5, Jörg Hartmann2, Andreas Herber2, Evelyn Jäkel1, Emma Järvinen7, Olivier Jourdan6, Udo Kästner8, Leif-Leonard Kliesch9, Franziska Köllner6, Mario Mech9, Stephan Mertes8, Roland Neuber2, Elena Ruiz-Donoso1, Martin Schnaiter10, Johannes Schneider6, Johannes Stapf1, and Marco Zanatta2 André Ehrlich et al.
  • 1Leipziger Institut für Meteorologie (LIM), Universität Leipzig, Leipzig, Germany
  • 2Alfred–Wegener–Institut, Helmholtz–Zentrum für Polar– und Meeresforschung (AWI), Germany
  • 3Institut für Umweltphysik (IUP), Universität Bremen, Bremen, Germany
  • 4Institut für Physik der Atmosphäre (IPA), Johannes Gutenberg-Universität, Mainz, Germany
  • 5Particle Chemistry Department, Max-Planck-Institut für Chemie (MPIC), Mainz, Germany
  • 6Laboratoire de Météorologie Physique (LaMP), Université Clermont Auvergne/OPGC/CNRS, UMR 6016, Clermont-Ferrand, France
  • 7National Center for Atmospheric Research (NCAR), Boulder, CO, USA
  • 8Leibniz–Institut für Troposphärenforschung (TROPOS), Leipzig, Germany
  • 9Institut für Geophysik und Meteorologie (IGM), Universität zu Köln, Cologne, Germany
  • 10Institut für Meteorologie und Klimaforschung, Karlsruher Institut für Technologie (KIT), Karlsruhe, Germany

Abstract. The Arctic Cloud Observations Using Airborne Measurements during Polar Day (ACLOUD) campaign was carried out North-West of Svalbard (Norway) between 23 May–26 June 2017. The objective of ACLOUD was to study Arctic boundary layer and mid-level clouds and their role in Arctic Amplification. Two research aircraft (Polar 5 and 6) jointly performed 22 research flights over the transition zone between open ocean and closed sea ice. Both aircraft were equipped with identical instrumentation for measurements of basic meteorological parameters, as well as for turbulent and and radiative energy fluxes. In addition, on Polar 5 active and passive remote sensing instruments were installed, while Polar 6 operated in situ instruments to characterize cloud and aerosol particles as well as trace gases. A detailed overview of the specifications, data processing, and data quality is provided here. It is shown, that the scientific analysis of the ACLOUD data benefits from the coordinated operation of both aircraft. By combining the cloud remote sensing techniques operated on Polar 5, the synergy of multiinstrument cloud retrieval is illustrated. The remote sensing methods are validated using truly collocated in situ and remote sensing observations. The data of identical instruments operated on both aircraft are merged to extend the spatial coverage of mean atmospheric quantities and turbulent and radiative flux measurement. Therefore, the data set of the ACLOUD campaign provides comprehensive in situ and remote sensing observations characterizing the cloudy Arctic atmosphere. All processed, 1 calibrated, and validated data are published in the world data center PANGAEA as instrument-separated data subsets (Ehrlich et al., 2019b, https://doi.org/10.1594/PANGAEA.902603).

André Ehrlich et al.
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Collection of data sources for the Arctic CLoud Observations Using airborne measurements during polar Day (ACLOUD) campaign, North-West of Svalbard between 23 May - 26 June 2017 A. Ehrlich, M. Wendisch, C. Lüpkes, M. Buschmann, H. Bozem, D. Chechin, H.-C. Clemen, R. Dupuy, O. Eppers, J. Hartmann, A. Herber, E. Jäkel, E. Järvinen, O. Jourdan, U. Kästner, L.-L. Kliesch, F. Köllner, M. Mech, S. Mertes, R. Neuber, E. Ruiz-Donoso, M. Schnaiter, J. Schneider, J. Stapf, and M. Zanatta https://doi.org/10.1594/PANGAEA.902603

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Short summary
During the Arctic Cloud Observations Using Airborne Measurements during Polar Day (ACLOUD) campaign, two research aircraft (Polar 5 and 6) jointly performed 22 research flights over the transition zone between open ocean and closed sea ice. The data set combines remote sensing and in situ measurements of cloud, aerosol, and trace gas properties as well as turbulent and radiative fluxes, which will be used to study Arctic boundary layer and mid-level clouds and their role in Arctic Amplification.
During the Arctic Cloud Observations Using Airborne Measurements during Polar Day (ACLOUD)...
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