(AC)³ – Arctic Amplification TR 172 – Transregional Collaborative Research Centre TR 172_Travel & Tourism

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OverviewObservationsHALO-(AC)³ 2022MOSAiC 2019 – 2020AFLUX 2019PAMARCMiP 2018ACLOUD 2017 CloseModellingCrosscutting ActivitiesCCA1 – Lapse rate feedbackCCA2 – Surface processesCCA3 – Arctic mixed-phase cloudsCCA4 – Air mass transport and transformation Close CloseProjectsCluster A – Fluxes in the Arctic Boundary LayerA01 – Surface radiation fluxesA02 – Local energy budget profilesA03 – Areal energy flux profilesCluster B – Clouds, Aerosols & Water VapourB01 – Changes of TOA reflectance & cloudsB02 – Aerosol & surface spectral reflectanceB03 – Mixed-phase cloud observationsB04 – Aerosols & cloud formationB05 – Water vapour trendsB06 – Water vapour, aerosols & thin cloudsB07 – Sea ice leads & cloudsB08 – Spatial variability of ice water contentCluster C – Ocean, Atmosphere & Sea Ice InteractionsC01 – Surface heterogeneity & flux observationsC02 – Black carbon in snow & atmosphereC03 – Atm. composition & ocean colour feedbackC04 – Sea ice related processesCluster D – Atmospheric Circulation & TransportD01 – Atmospheric large-scale dynamicsD02 – Aerosol-cloud interactionsD03 – Atmosphere-ice-ocean interactionsD04 – Ocean heat transport & regional processesCluster E – Integration & SynthesisE01 – Lapse rate feedbackE02 – Ny-Ålesund columnE03 – Mixed-phase cloud processesE04 – Precipitation & snowfallCluster ZZ01 – Central servicesIRTG – Integrated Research Training GroupINF – Data management CloseCommitteesDirectorateScientific Steering TeamScientific Advisory BoardAssociated MembersMercator Fellowships CloseMeetingsPublicationsPeer-reviewed PublicationsPublications in DiscussionOther Publicationssubmitted PublicationsThesesPhD ThesesMaster ThesesBachelor Theses Close ClosePhDGuest ProgrammOutreachNewsletterFact Sheets CloseData OverviewObservationsHALO-(AC)³ 2022MOSAiC 2019 – 2020AFLUX 2019PAMARCMiP 2018ACLOUD 2017 CloseModellingCrosscutting ActivitiesCCA1 – Lapse rate feedbackCCA2 – Surface processesCCA3 – Arctic mixed-phase cloudsCCA4 – Air mass transport and transformation Close CloseProjectsCluster A – Fluxes in the Arctic Boundary LayerA01 – Surface radiation fluxesA02 – Local energy budget profilesA03 – Areal energy flux profilesCluster B – Clouds, Aerosols & Water VapourB01 – Changes of TOA reflectance & cloudsB02 – Aerosol & surface spectral reflectanceB03 – Mixed-phase cloud observationsB04 – Aerosols & cloud formationB05 – Water vapour trendsB06 – Water vapour, aerosols & thin cloudsB07 – Sea ice leads & cloudsB08 – Spatial variability of ice water contentCluster C – Ocean, Atmosphere & Sea Ice InteractionsC01 – Surface heterogeneity & flux observationsC02 – Black carbon in snow & atmosphereC03 – Atm. composition & ocean colour feedbackC04 – Sea ice related processesCluster D – Atmospheric Circulation & TransportD01 – Atmospheric large-scale dynamicsD02 – Aerosol-cloud interactionsD03 – Atmosphere-ice-ocean interactionsD04 – Ocean heat transport & regional processesCluster E – Integration & SynthesisE01 – Lapse rate feedbackE02 – Ny-Ålesund columnE03 – Mixed-phase cloud processesE04 – Precipitation & snowfallCluster ZZ01 – Central servicesIRTG – Integrated Research Training GroupINF – Data management CloseCommitteesDirectorateScientific Steering TeamScientific Advisory BoardAssociated MembersMercator Fellowships CloseMeetingsPublicationsPeer-reviewed PublicationsPublications in DiscussionOther Publicationssubmitted PublicationsThesesPhD ThesesMaster ThesesBachelor Theses Close ClosePhDGuest ProgrammOutreachNewsletterFact Sheets CloseData DFG approved the funding of the second phase of (AC)³ with 14.5Mio Euro for four years. (Esther Horvath, MOSAiC 2019; André Ehrlich, ACLOUD 2017) The Arctic sea ice has declined significantly during the last years. (Marlen Brückner, PASCAL 2017) Fisheye image from Polar 5 on Arctic clouds and Polar 6 during ACLOUD. (ACLOUD 2017) Polar 6 & 5 aircraft at Longyearbyen airport during ACLOUD. (Tobias Donth, ACLOUD 2017) Ny-Ålesund radiation measurements at atmospheric observatory. (Jürgen Graeser, 2013) Meteorological station including tethered balloon at the ice camp during PASCAL. (Marlen Brückner, PASCAL 2017) Polar 5 and Polarstern off Longyeabyen. (Alfred-Wegener-Institute / Thomas Krumpen, (CC-BY-NC 4.0)) Polar 5 passing by Polarstern during PASCAL and ACLOUD. (Marlen Brückner, PASCAL/ACLOUD 2017) Aerial view of Ny-Ålesund in the summer 2012. (Alfred-Wegener-Institute / Marion Maturilli, 2012) The German research aircraft Polar 6 flying over Arctic low level clouds during ACLOUD. (Tobias Donth, ACLOUD 2017) Ny-Ålesund lidar measurements and northern lights. (Alfred-Wegener-Institute / René Bürgi, 2015) The German research vessel Polarstern and the ice camp during PASCAL 2017. (Peter Gege, ice camp during PASCAL 2017) (AC)³ publication record News24.02.2022 | Three MOSAiC Overview Paper with (AC)³ acknowledgement16.12.2021 | First (AC)³ Fact Sheet released30.09.2021 | Balloon measurements in Ny-Ålesund17.09.2021 | Mercator Matt Shupe in Leipzig31.05.2021 | mias-klimatagebuch goes online!06.11.2020 | ARD-Themenwoche: “Expedition Arktis – Ein Jahr. Ein Schiff. Im Eis.”Events11.05.2022 - 13.05.2022 | (AC)³ GA May 202202.05.2022 | (AC)³ Online lesson: “The impact of Arctic climate changes on weather and climate in mid-latitudes”05.03.2022 - 15.04.2022 | HALO-(AC)³ campaign07.02.2022 | (AC)³ Online lesson: “Aerosol modelling”24.01.2022 - 28.01.2022 | 24, 26, & 28 January 2022: Equal Opportunity Activity – Online Workshop for female* PhDs/Postdocs “Self-presentation & networking”17.01.2022 - 19.01.2022 | Advanced Training Module on ‘Arctic Sea Ice in the Climate System’ The Transregional Collaborative Research Centre TR 172 (AC)³ provides a unique research environment to study the increase of Arctic near-surface temperature during the last decades, which is commonly referred to as Arctic Amplification, from complementary viewpoints, bridging various observations and modelling approaches.University of Leipzig, as the coordinating University has applied together with the University of Bremen, University of Cologne and the Alfred-Wegener Institute for Polar and Marine Research (AWI), and the Leibniz Insitute for Tropospheric Research (TROPOS) for support of this research project.The overarching scientific objective of (AC)³ is to identify, investigate, and evaluate the key processes contributing to Arctic Amplification, improve our understanding of the major feedback mechanisms, and quantify their relative importance for Arctic Amplification.The TR 172 is funded by the Deutsche Forschungsgemeinschaft – DFG. 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