All meetings organized by (AC)³ are listed below.


5 – 6 October: Workshop “Airborne Activities in the Arctic: Science and Prospects”

Location: Bibliotheca Albertina, Beethovenstr. 6, 04107 Leipzig

We are planning to apply HALO (High Altitude and Long-Range Research Aircraft) in the framework of the envisioned second phase of (AC)³ in March-April of either 2020 (during MOSAiC) or 2021. The objective will be to measure air mass transformations along their way from the inner Arctic to the open Arctic Sea. In particular, vertical profiles observations of meteorological, aerosol, cloud, and radiative energy budget parameters and their transformations along meridional air mass transports over sea ice has been conducted with a positive outcome. However, it is now time to specify and sharpen the scientific objectives of this mission and to write a White Book summarizing the aims. For this purpose we are planning a topical workshop.

Workshop flyer (continuously updated)

Further information will follow soon.

26 – 28 March: 1st (AC)³ Science Conference on Arctic Amplification

The conference had the occasion to summarize the scientific results obtained during the first year of the
Transregional Collaborative Research Center TR 172 on Arctic Amplification (AC)³, and discussed them in context with the international research community. Distinguished guest speakers have talked about recent highlights and current hypotheses in the field of Arctic climate research. Talks and posters were presented in five sessions. The “(AC)³ Young Investigators Awards“ were awarded to 5 Early Career Scientists. The conference is supposed to promote scientific exchange and identify key tasks to be addressed in near-future Arctic climate research.

 A conference flyer can be downloaded here ( outside / inside ).

The final conference agenda is available here.

Further information can be found in the intranet.

19 – 25 March: Winter School on the Observation and Modeling of High-latitute and Arctic Clouds

The winter school is an advanced course intended for graduate students and researchers who want to receive
up-to-date knowledge on the observation and modeling of clouds and precipitation, with a specific focus on
Arctic and high-latitude clouds. The course is structured around a combination of lectures and hands-on
experience using data from research-grade radars (US DOE ARM and ACTRIS), in situ sensors and state-ofthe-
art models. The course topics include: cloud and precipitation observations (cloud radars, lidars, solar
and microwave radiometers, in situ sensors), cloud modeling, precipitation formation, boundary layer

Some expressions from the winter school:



1 – 2 December: GA Meeting

The 2nd annual (AC)³ General Assembly (GA) meeting will take place from December 1st to 2nd, 2016 in Potsdam (Germany).

The Early Career Scientist and PIs will present their scientific highlights from the first year. During breakout group discussion, the (AC)³ participants will report and discuss on onging collaborations with other Cluster groups and upcoming campaigns.

Meeting Agenda and additional information (PDF).


Further information can be found in the intranet.

21 – 22 November: ACLOUD Workshop

The ACLOUD workshop took place from 21st to 22nd of November, 2016 in Bremen (Germany).

The ACLOUD campaign will take place from May 22nd to June 28th, 2017. The AWI Polar 5 and Polar 6 research aircrafts will be deployed in Ny-Ålesund.

In order to prepare this measurement campaign, about 30 researchers from Germany (University of Leipzig, University of Köln, University of Bremen, University of Mainz, AWI, TROPOS), and France (OPGC University) took part in the workshop. Most of the participants are key international ACLOUD PIs, aircraft instrument scientists and (AC)³ researchers who will all actively take part in the ACLOUD campaign or use the data for their research.

The following items have been discussed during the workshop:

  • presentation of science questions and discussion of case studies
  • refining flight strategies
  • discussion about the ACLOUD procedures, the work plan and the interface between the different groups (instruments, flight facility, flight planning)
  • presenting the local infrastructure in Ny-Ålesund
  • discussion about a common visualization domain and a common projection

The many lively discussions between theoretical meteorologists, instrument scientists, pilots and students taking part in the campaign made this workshop a successful meeting.

ACLOUD workshop agenda and time schedule (PDF).

Further information can be found in the intranet.

18 – 19 October: PAMARCMiP Kick-off Meeting

The PAMARCMiP kick-off meeting of (AC)³ took place from October 18th to October 19th, 2016 in Bremen (Germany).

Among the participants were 3 PIs, 6 Postdocs, 2 PhDs and 6 scientist from the participating (AC)³ institutes and partners from the Department of Environmental Science (ATPRO), University of Tokio (EPS), Niiggata University, and the University of Mainz (IPA).

The meeting has been the occasion to get to plan the aircraft campaign PAMARCMIP in spring or early summer 2018 from Station Nord, and to start collaborations within projects, between research areas and with the external partners.

PAMARCMiP Agenda and time schedule (PDF).

Further information can be found in the intranet.


Name Insitute Title
Andreas Herber AWI Welcome & Inroduction PDF
André Ehrlich LIM Inroduction of (AC)³ PDF
Evi Jäkel LIM Project C01 PDF
André Ehrlich LIM Project C02 PDF
Andreas Massling Aarhus Uni Villum Research station – science PDF
Makato Koike Uni Tokio Cloud measurements PDF (part 1)
PDF (part 2)
Jinro Ukita Niigata Uni
Cloud-sea ice interactions
Heiko Bozem IAP
Trace gas measurements
Andreas Petzold FZ Jülich
Evi Jäkel LIM
Snow albedo and BRDF measurements
Tobias Donth LIM
Remote sensing of BC in snow
Gerit Birnbaum AWI
Physical snow characteristics
Marco Zanatta AWI
BC measurements and snow sampling
Holger Siebert TROPOS
PBL study with thethered balloon
Georg Heygster IUP
Sea ice and snow thickness measurements
Luca Lelli IUP Satellite observations
Martin Gehrmann AWI Polar 5
Stefan Hendricks AWI EM-Bird sea ice thickness
Andreas Massling Aarhus Uni VILLUM Station – logistics
Antje Kautzleben AWI-P AMALi
Meeting minutes

14 – 17 July: Linux/Unix PhD Workshop

PhD Workshop: An Introduction into Linux/Unix and Programming with FORTRAN 14. – 17.07.16 in Leipzig

When interacting with a server or computing cluster, the use of the command line (e.g. the Lunix terminal) is essential. Many of these servers are using a Linux system, or a system that can be handled in a similar way and are not accessible with a graphical user interface (GUI). The knowledge about the functions ot the terminal will make it a powerful tool for everyda work, not only when interacting with computing centres but also with peronal Linux/Unix machines.

FORTRAN is still one of the most commonly used programming languages in the field of meteorology/climatology. Its performance makes it useful for modelling as well as for data handling and analysis.

This workshop will give a short introduction into theses fields through exercises and coaching. It will be held by PhD students who are experienced users.

The workshop is capped at 14 participants for room capacity reasons.

1 – 2 June: PhD Kick-off Meeting

The Kick-off PhD meeting of (AC)³ tooks place from June 1st to June 2nd, 2016 at Kloster Nimbschen, Grimma (Germany).

This meeting is for the (AC)³ PhDs to organize themselves and to improve their collaboration and productivity between the different locations.

The program of the PhD Kick-off meeting and additional information is available here. (PDF)

30 May – 1 June: Kick-off Meeting

The Kick-off meeting of (AC)³ tooks place from May 30th to June 1st, 2016 at Kloster Nimbschen, Grimma (Germany).

The meeting had the occasion to get to know each other and to start collaborations within projects, between research areas and with the international guests.

The program of the Kick-off meeting and additional information is available here.

Further information can be found in the intranet.

16 – 17 February: ACLOUD Meeting

The ACLOUD meeting of (AC)³ took place from February 16th to February 17th, 2016 in Leipzig (Germany).

Among the participants were 6 PIs, 3 PhDs and 13 scientist from the participating (AC)³ institutes and partners from the University of Mainz (IPA), Max-Planck-Institute Mainz (MPI), and the Karlsruher Institute for Technology (KIT).

The meeting has been the occasion to get to plan the aircraft campaign ACLOUD from 22 May – 28 June 2017 in Longyearbyen, Svalbard, and to start collaborations within projects, between research areas and with the external partners.

ACLOUD Agenda and time schedule (PDF).

Further information can be found in the intranet.


Name Institute Title
Manfred Wendisch LIM Introduction (AC)³ PDF
André Ehrlich/Christof Lüpkes LIM/AWI Introduction ACLOUD & AFLUX PDF
André Ehrlich LIM P5: SMART PDF
Evi Jäkel LIM P5: Eagle/Hawk PDF
Mario Mech IGM P5: MiRAC PDF
Roland Neuber AWI Potsdam P5: AMALi PDF
Christof Lüpkes AWI Bremerhaven P5/P6: Nose booms PDF
Stephan Mertes TROPOS P6: CVI + aerosol instrumentation PDF
Johannes Schneider MPI P6: AMS/ALABAMA PDF
Dirk Kalmbach AWI Bremerhaven P6: SP2, UHSAS PDF
Heiko Bozen/Peter Hoor IPA P6: CO/CO2 + Polar Dome PDF
Ralf Weigel IPA P6: PIP, CIP, HALOHolo PDF
Martin Schnaiter KIT P6: SID3 + PHIPS PDF
Ronny Engelmann TROPOS Activities on Polarstern PDF
Kerstin Ebell IGM Actvities in Ny-Ålesund – Radar PDF
Roland Neuber AWI Potsdam Actvities in Ny-Ålesund – AWIPEV PDF
Meeting Minutes
Flight patterns