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

The Arctic CLoud Observations Using airborne measurements during polar Day (ACLOUD) campaign was carried out north-west of Svalbard (Norway) between 23 May and 6 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 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 multi-instrument cloud retrieval is illustrated. The remote sensing methods were validated using truly collocated in situ and remote sensing observations. The data of identical instruments operated on both aircraft were 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, 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).

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Related Dataset #1 : Airborne in-situ measurements of the aerosol absorption coefficient, aerosol particle number concentration and size distribution of cloud particle residuals and ambient aerosol particles during the ACLOUD campaign in May and June 2017

Related Dataset #2 : Airborne in-situ measurement of carbon monoxide, carbon dioxide, water vapor and ozone during ACLOUD 2017

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Related Dataset #17 : Master tracks in different resolutions during POLAR 6 campaign ACLOUD_2017

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Related Dataset #26 : Airborne radar reflectivity and brightness temperature measurements with POLAR 5 during ACLOUD in May and June 2017, supplement to: Mech, Mario; Kliesch, Leif-Leonard; Anhäuser, Andreas; Rose, Thomas; Kollias, Pavlos; Crewell, Susanne (2019): Microwave Radar/radiometer for Arctic Clouds (MiRAC): first insights from the ACLOUD campaign. Atmospheric Measurement Techniques, 12(9), 5019-5037
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Author Ehrlich, André
Wendisch, Manfred
Lüpkes, Christof
Buschmann, Matthias
Bozem, Heiko
Chechin, Dmitri
Clemen, Hans-Christian
Dupuy, Régis
Eppers, Olliver
Hartmann, Jörg
Herber, Andreas
Jäkel, Evelyn
Järvinen, Emma
Jourdan, Olivier
Kästner, Udo
Kliesch, Leif-Leonard
Köllner, Franziska
Mech, Mario
Mertes, Stephan
Neuber, Roland
Ruiz-Donoso, Elena
Schnaiter, Martin
Schneider, Johannes
Stapf, Johannes
Zanatta, Marco
Publisher UCAR/NCAR - Library
Publication Date 2019-11-29T00:00:00
Digital Object Identifier (DOI) Not Assigned
Alternate Identifier N/A
Resource Version N/A
Topic Category geoscientificInformation
Progress N/A
Metadata Date 2023-08-18T18:12:15.219815
Metadata Record Identifier edu.ucar.opensky::articles:23006
Metadata Language eng; USA
Suggested Citation Ehrlich, André, Wendisch, Manfred, Lüpkes, Christof, Buschmann, Matthias, Bozem, Heiko, Chechin, Dmitri, Clemen, Hans-Christian, Dupuy, Régis, Eppers, Olliver, Hartmann, Jörg, Herber, Andreas, Jäkel, Evelyn, Järvinen, Emma, Jourdan, Olivier, Kästner, Udo, Kliesch, Leif-Leonard, Köllner, Franziska, Mech, Mario, Mertes, Stephan, Neuber, Roland, Ruiz-Donoso, Elena, Schnaiter, Martin, Schneider, Johannes, Stapf, Johannes, Zanatta, Marco. (2019). A comprehensive in situ and remote sensing data set from the Arctic CLoud Observations Using airborne measurements during polar Day (ACLOUD) campaign. UCAR/NCAR - Library. http://n2t.net/ark:/85065/d76w9f7w. Accessed 12 May 2025.

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