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  The Arctic Cloud Puzzle: Using ACLOUD/PASCAL Multiplatform Observations to Unravel the Role of Clouds and Aerosol Particles in Arctic Amplification

Wendisch, M., Macke, A., Ehrlich, A., Luepkes, C., Mech, M., Chechin, D., et al. (2019). The Arctic Cloud Puzzle: Using ACLOUD/PASCAL Multiplatform Observations to Unravel the Role of Clouds and Aerosol Particles in Arctic Amplification. Bulletin of the American Meteorological Society, 100(5), 841-872. doi:10.1175/BAMS-D-18-0072.1.

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 Creators:
Wendisch, Manfred1, Author
Macke, Andreas1, Author
Ehrlich, Andre1, Author
Luepkes, Christof1, Author
Mech, Mario1, Author
Chechin, Dmitry1, Author
Dethloff, Klaus1, Author
Velasco, Carola Barrientos1, Author
Bozem, Heiko1, Author
Brueckner, Marlen1, Author
Clemen, Hans-Christian2, Author              
Crewell, Susanne1, Author
Donth, Tobias1, Author
Dupuy, Regis1, Author
Ebell, Kerstin1, Author
Egerer, Ulrike1, Author
Engelmann, Ronny1, Author
Engler, Christa1, Author
Eppers, Oliver1, Author
Gehrmann, Martin1, Author
Gong, Xianda1, AuthorGottschalk, Matthias1, AuthorGourbeyre, Christophe1, AuthorGriesche, Hannes1, AuthorHartmann, Joerg1, AuthorHartmann, Markus1, AuthorHeinold, Bernd1, AuthorHerber, Andreas1, AuthorHerrmann, Hartmut1, AuthorHeygster, Georg1, AuthorHoor, Peter1, AuthorJafariserajehlou, Soheila1, AuthorJaekel, Evelyn1, AuthorJaervinen, Emma1, AuthorJourdan, Olivier1, AuthorKaestner, Udo1, AuthorKecorius, Simonas1, AuthorKnudsen, Erlend M.1, AuthorKöllner, Franziska2, Author              Kretzschmar, Jan1, AuthorLelli, Luca1, AuthorLeroy, Delphine1, AuthorMaturilli, Marion1, AuthorMei, Linlu1, AuthorMertes, Stephan1, AuthorMioche, Guillaume1, AuthorNeuber, Roland1, AuthorNicolaus, Marcel1, AuthorNomokonova, Tatiana1, AuthorNotholt, Justus1, AuthorPalm, Mathias1, Authorvan Pinxteren, Manuela1, AuthorQuaas, Johannes1, AuthorRichter, Philipp1, AuthorRuiz-Donoso, Elena1, AuthorSchaefer, Michael1, AuthorSchmieder, Katja1, AuthorSchnaiter, Martin1, AuthorSchneider, Johannes2, Author              Schwarzenboeck, Alfons1, AuthorSeifert, Patric1, AuthorShupe, Matthew D.1, AuthorSiebert, Holger1, AuthorSpreen, Gunnar1, AuthorStapf, Johannes1, AuthorStratmann, Frank1, AuthorVogl, Teresa1, AuthorWelti, Andre1, AuthorWex, Heike1, AuthorWiedensohler, Alfred1, AuthorZanatta, Marco1, AuthorZeppenfeld, Sebastian1, Author more..
Affiliations:
1external, ou_persistent22              
2Particle Chemistry, Max Planck Institute for Chemistry, Max Planck Society, ou_1826291              

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 Abstract: Clouds play an important role in Arctic amplification. This term represents the recently observed enhanced warming of the Arctic relative to the global increase of near-surface air temperature. However, there are still important knowledge gaps regarding the interplay between Arctic clouds and aerosol particles, and surface properties, as well as turbulent and radiative fluxes that inhibit accurate model simulations of clouds in the Arctic climate system. In an attempt to resolve this so-called Arctic cloud puzzle, two comprehensive and closely coordinated field studies were conducted: the Arctic Cloud Observations Using Airborne Measurements during Polar Day (ACLOUD) aircraft campaign and the Physical Feedbacks of Arctic Boundary Layer, Sea Ice, Cloud and Aerosol (PASCAL) ice breaker expedition. Both observational studies were performed in the framework of the German Arctic Amplification: Climate Relevant Atmospheric and Surface Processes, and Feedback Mechanisms (AC)3 project. They took place in the vicinity of Svalbard, Norway, in May and June 2017. ACLOUD and PASCAL explored four pieces of the Arctic cloud puzzle: cloud properties, aerosol impact on clouds, atmospheric radiation, and turbulent dynamical processes. The two instrumented Polar 5 and Polar 6 aircraft; the icebreaker Research Vessel (R/V) Polarstern; an ice floe camp including an instrumented tethered balloon; and the permanent ground-based measurement station at Ny-Ålesund, Svalbard, were employed to observe Arctic low- and mid-level mixed-phase clouds and to investigate related atmospheric and surface processes. The Polar 5 aircraft served as a remote sensing observatory examining the clouds from above by downward-looking sensors; the Polar 6 aircraft operated as a flying in situ measurement laboratory sampling inside and below the clouds. Most of the collocated Polar 5/6 flights were conducted either above the R/V Polarstern or over the Ny-Ålesund station, both of which monitored the clouds from below using similar but upward-looking remote sensing techniques as the Polar 5 aircraft. Several of the flights were carried out underneath collocated satellite tracks. The paper motivates the scientific objectives of the ACLOUD/PASCAL observations and describes the measured quantities, retrieved parameters, and the applied complementary instrumentation. Furthermore, it discusses selected measurement results and poses critical research questions to be answered in future papers analyzing the data from the two field campaigns.

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Language(s): eng - English
 Dates: 2019
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: ISI: 000470678200008
DOI: 10.1175/BAMS-D-18-0072.1
 Degree: -

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Title: Bulletin of the American Meteorological Society
Source Genre: Journal
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Publ. Info: American Meteorological Society
Pages: - Volume / Issue: 100 (5) Sequence Number: - Start / End Page: 841 - 872 Identifier: ISSN: 0003-0007
CoNE: https://pure.mpg.de/cone/journals/resource/954925377920