DFG approved the funding of the second phase of (AC)³ with 14.5Mio Euro for four years.

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.

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.

Fisheye image from Polar 5 on Arctic clouds and Polar 6 during ACLOUD.

(ACLOUD 2017)

Polar 6 & 5 aircraft at Longyearbyen airport during ACLOUD.

Polar 6 & 5 aircraft at Longyearbyen airport during ACLOUD.

(Tobias Donth, ACLOUD 2017)

Ny-Ålesund radiation measurements at atmospheric observatory.

Ny-Ålesund radiation measurements at atmospheric observatory.

(Jürgen Graeser, 2013)

Meteorological station including tethered balloon at the ice camp during PASCAL.

Meteorological station including tethered balloon at the ice camp during PASCAL.

(Marlen Brückner, PASCAL 2017)

Polar 5 and Polarstern off Longyeabyen.

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.

Polar 5 passing by Polarstern during PASCAL and ACLOUD.

(Marlen Brückner, PASCAL/ACLOUD 2017)

Aerial view of Ny-Ålesund in the summer 2012.

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.

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.

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.

The German research vessel Polarstern and the ice camp during PASCAL 2017.

(Peter Gege, ice camp during PASCAL 2017)

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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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