Clouds play an important role in the polar climate due to their interaction with atmospheric radiation and their role in the hydrological cycle linking poleward water vapour transport with precipitation, thereby affecting the mass balance of the polar ice sheets. Cloud-radiative feedbacks have also an important influence on sea ice. Cloud and precipitation properties depend strongly on the atmospheric dynamics and moisture sources and transport, as well as on aerosol particles, which can act as cloud condensation and ice nuclei.

This session aims at bringing together researchers using observational (in-situ, aircraft, ground-based, and satellite-based remote sensing) and/or modeling approaches (at various scales) to improve our understanding of polar tropospheric clouds, precipitation, and related mechanisms and impacts. Contributions are invited on various relevant processes including (but not limited to):
- Drivers of cloud/precipitation microphysics at high latitudes,
- Sources of cloud nuclei both at local and long range,
- Linkages of polar clouds/precipitation to the moisture sources and transport,
- Relationship of the poleward moisture transport to processes in the tropics and extra-tropics, including extreme transport events (e.g., atmospheric rivers, moisture intrusions),
- Relationship of moisture/cloud/precipitation processes to the atmospheric dynamics, ranging from synoptic and meso-scale processes to teleconnections and climate indices,
- Role of the surface-atmosphere interaction in terms of mass, energy, and cloud nuclei particles (evaporation, precipitation, albedo changes, cloud nuclei sources, etc)
- Effects that the clouds/precipitation in the Polar Regions have on the polar and global climate system, surface mass and energy balance, sea ice and ecosystems.

Papers including new methodologies specific to polar regions are encouraged, such as (i) improving polar cloud/precipitation parameterizations in atmospheric models, moisture transport events detection and attribution methods specifically in the high latitudes, and (ii) advancing observations of polar clouds and precipitation. We would like to emphasize collaborative observational and modeling activities, such as the Year of Polar Prediction (YOPP), Polar-CORDEX, the (AC)³ project on Arctic Amplification, SOCRATES and other campaigns over the Southern Ocean/Antarctica, and encourage related contributions.

The session is endorsed by the SCAR Antarctic Clouds and Aerosols Action Group.

Young scientist/student presentations are especially encouraged and we will reserve several oral units for such papers in this session.

Co-organized as CR3.06/HS11.16
Convener: Manfred Wendisch | Co-conveners: Susanne Crewell, Irina V. Gorodetskaya, Tom Lachlan-Cope, Nicole van Lipzig
| Fri, 12 Apr, 08:30–12:30
Room 0.31
| Attendance Fri, 12 Apr, 14:00–15:45
Hall X5

Attendance time: Friday, 12 April 2019, 14:00–15:45 | Hall X5

Chairperson: Tom Lachlan-Cope
X5.389 |
Kerstin Ebell, Tatiana Nomokonova, Marion Maturilli, and Christoph Ritter
X5.390 |
Matthias Gottschalk, Ulrike Egerer, Holger Siebert, André Ehrlich, and Manfred Wendisch
X5.391 |
Robert Rauterkus, Cedrick Ansorge, Yaping Shao, and Ulrich Löhnert
X5.392 |
Investigation of Arctic mixed-phase clouds with the novel active and passive microwave package MiRAC
Mario Mech, Susanne Crewell, Leif Leonard Kliesch, Birte Solveig Kulla, Andreas Anhaeuser, Pavlos Kollias, and Thomas Rose
X5.393 |
Tatiana Nomokonova, Kerstin Ebell, Ulrich Löhnert, Marion Maturilli, and Christoph Ritter
X5.394 |
Jan Kretzschmar, Marc Salzmann, Johannes Mülmenstädt, and Johannes Quaas
X5.395 |
| presentation
Konstantina Nakoudi, Christoph Ritter, Roland Neuber, and Marion Maturilli
X5.396 |
Sebastian Zeppenfeld, Markus Hartmann, Manuela van Pinxteren, Astrid Bracher, Frank Stratmann, and Hartmut Herrmann
X5.397 |
Soheila Jafariserajehlou, Linlu Mei, Marco Vountas, Vladimir Rozanov, and John P. Burrows
X5.398 |
Tom Lachlan-Cope and Gillian Young
X5.399 |
Niels Souverijns, Alexandra Gossart, Alexander Mangold, Quentin Laffineur, Paul Herenz, Heike Wex, Irina Gorodetskaya, Gesa Eirund, Anna Possner, and Nicole van Lipzig
X5.400 |
Thomas Kuhn, Sandra Vázquez-Martín, and Salomon Eliasson
X5.401 |
Elisabeth Schlosser, Irina Gorodetskaya, Diogo Luis, Kevin W. Manning, Jordan G. Powers, Alexis Berne, Josué Gehring, and Katherine Leonard
X5.402 |
Irina V. Gorodetskaya, Diogo Luis, Elisabeth Schlosser, Iris Thurnherr, Pascal Graf, Franziska Aemisegger, Heini Wernli, Josue Gehring, Alexis Berne, Yvonne Weber, Michael Lehning, and Katherine Leonard
X5.403 |
Carolina Viceto, Mario Mech, Susanne Crewell, Annette Rinke, Alfredo Rocha, and Irina Gorodetskaya
X5.404 |
Annette Rinke, Benjamin Segger, Susanne Crewell, Marion Maturilli, Tuomas Naakka, Tiina Nygard, Timo Vihma, Fadwa Alshawaf, Galina Dick, and Jens Wickert
X5.405 |
Ana Radovan, Susanne Crewell, Annette Rinke, Anakaisa von Lerber, and Mario Mech
X5.406 |
Susanne Crewell, Kerstin Ebell, Tatiana Nomokonova, Mario Mech, Ana Radovan, Arantxa Triana Gomes, Georg Heygster, Stefan Noël, Gunnar Spreen, Marion Maturilli, Annette Rinke, Hannes Griesche, Carolina Viceto, Irina Gorodetskaya, Galina Dick, and Marc Schröder