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Overview

Polar Cloud Working Group Co-chairs: Hugh Morrison and James Pinto Breakout Session I Monday, 2 June, 1400-1800 Breakout Session II Wednesday, 4 June, 1400-1700. Overview. Review of current research related to polar clouds (13 talks) 4 talks on cloud observations, recent field campaigns

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Overview

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  1. Polar Cloud Working GroupCo-chairs: Hugh Morrison and James PintoBreakout Session IMonday, 2 June, 1400-1800Breakout Session IIWednesday, 4 June, 1400-1700

  2. Overview Review of current research related to polar clouds (13 talks) 4 talks on cloud observations, recent field campaigns 2 talks on Arctic cloud-climate feedbacks 2 talks on ice formation processes in mixed-phase clouds 1 talk on parameterization development 4 talks on modeling results from MPACE

  3. Overview Description of 2 new case studies for model intercomparison Weakly-forced mixed-phase stratus from SHEBA Kinematic 1-D microphysics tests Discussion: Where do we go from here? (future efforts of Polar Cloud Working Group) Focus on cloud types other than mixed-phase stratus? (ice-phase – diamond dust..) Incorporation of new observational tools Cloud-aerosol interaction (ISDAC, etc.)

  4.  14:00 – 14:05 H. Morrison and J. Pinto, co-chairs Opening remarks 14:05 – 14:35 S. Ghan and Coauthors (presented by M. Dubey) Indirect and Semi-Direct Aerosol Campaign (ISDAC): The influence of Arctic aerosol on clouds 14:35 – 14:55 P. Zuidema, P. Lawson, B. Baker, B. Pilson, and Q. Mo Observations of summertime convective clouds in the Arctic from SHEBA 14:55 – 15:15 J. Remillard and P. Kollias Cloud climatology and microphysics at Eureka using synergistic measurements from a cloud radar and a cloud-aerosol lidar. 15:15 – 15:35 J. Kay, A. Gettelman, K. Reader, T. L'ecuyer, and G. Stephens Arctic cloud, circulation, and sea ice during 2007 and beyond 15:35 – 15:45 Discussion ---------------------------------------------------------------------------------------------------------- 15:45 – 16:15                 COFFEE AND TEA ---------------------------------------------------------------------------------------------------------- Detailed Agenda

  5. 16:15 – 16:35 T. Garrett, M. Maestas, and C. Zhao The role of radiative-dynamic feedbacks in amplifying surface warming by Arctic stratus in polluted conditions 16:35 – 16:55 A. Fridlind and A. Ackerman Low-level Arctic mixed-phase clouds: Ice formation under polluted and pristine conditions 16:55 – 17:15 G. de Boer, T. Hashino, G. Tripoli, and E. Eloranta A possible role for immersion freezing in mixed-phase stratus clouds 17:15 – 17:35 D. Veron and N. Barton Development of a mixed-phase cloud-radiation parameterization using SHEBA data 17:35 – 18:00 Discussion

  6. Wednesday June 4 14:00 – 17:00                 Polar Cloud Working Group Breakout Session I Chair: Hugh Morrison Venue: Room 2 14:00 – 14:20 D. Spangenburg, P. Minnis, and S. Sun-Mack Cloud property retrievals over the Arctic from the A-Train satellites Aqua, Cloudsat, and Calipso 14:20 – 14:40 Steve Klein and Coauthors Intercomparison of model simulations of mixed-phase clouds during MPACE, Part 1: Single-layer cloud 14:40 – 15:00 Hugh Morrison and Coauthors Intercomparison of model simulations of mixed-phase clouds during MPACE, Part 1: Single-layer cloud 15:00 – 15:20 Y. Luo, K.-M. Xu, H. Morrison, G. McFarquhar, Z. Wang, and G. Zhang Multi-layer mixed-phase clouds simulated by a cloud-resolving model: Comparison with ARM observations and sensitivity experiments. 15:20 – 15:40 A. Solomon, O. Persson, M. Shupe, H. Morrison, and J.-W. Bao Mesoscale simulations of polar clouds during M-PACE 15:40 – 15:45 Discussion ---------------------------------------------------------------------------------------------------------- 15:45 – 16:00                 COFFEE AND TEA ----------------------------------------------------------------------------------------------------------

  7. 16:00 – 16:20       H. Morrison       SHEBA springtime mixed-phase model intercomparison case, 1-D kinematic microphysics tests 16:20– 17:00 General discussion (topics TBA)

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