Cloud Dynamics and Microphysics Group

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Presentation transcript:

Cloud Dynamics and Microphysics Group Institute for Climate and Atmospheric Science (ICAS) Cloud Dynamics and Microphysics Group

The Cloud Group Stephen Yahui Alan G Theo John Barb Lindsay Tor Zhiqiang Mirek Ken Steven Tom Sardar Bethan Peter Chris Ralph Ben Doug Alan B Keith Aerosols, dynamics, climate, chemistry Mark Patricia Jim Sarah-Jane Matt Sonia Lasher-Trap Jeff Trapp Joris Brombach

Institute for Climate and Atmospheric Science (ICAS) Cloud Dynamics and Microphysics Group Cloud -aerosol interactions – Sc clouds R<10 um 10<r<20 20<r<50 r>50 r>100 LCM model Mean = –9.40 W m-2 Mean difference in radiative forcing (W m-2), between control and N = 375 cm-3 in regions of low-level maritime cloud, for SH Spring SH season ΔF (W m-2) Sc amount (%) Summer (DJF) –8.16 15.30 Autumn (MAM) –6.35 14.95 Winter (JJA) –7.52 15.95 Spring (SON) –9.40 15.97 Semi-direct effect – Bin resolved LEM bin bulk

Institute for Climate and Atmospheric Science (ICAS) Cloud Dynamics and Microphysics Group AIDA Chamber, Karlsruhe Cirrus studies Glassy organic aerosols explain high in-cloud humidities in cirrus? COSIC – contrails to cirrus Mineral dust nucl Leeds Cloud Proc Chamber GCSS WG Cirrus – March 9th 2000 paper in prep

Institute for Climate and Atmospheric Science (ICAS) Cloud Dynamics and Microphysics Group ASCOS First comprehensive observations in the central arctic: Using UM and LEM (bin and bulk) to understand the complex couplings between cloud, radiation, dynamics, and the surface fluxes in unique arctic environment (e.g. low aerosol concentrations ) that is undergoing How do the clouds maintain frequently 100s metres into the inversion? - Where are the aerosols coming from? How important is the coupling with the surface for arctic stratus? Improve the UM. Micro-meteorology masts Tethered balloon SODAR ICAS measurements on the ice…

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