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Photo courtesy Carly Calvin, NCAR

NSF C-130 Platform Report Robert Wood. (a) 20 o S Cross-Sections [4 full missions+5 partial missions ] - to characterize structure of MBL, aerosols, clouds along the 20 o S parallel from 72-85 o W - collaborative (RHB, BAe-146, Do-228, G-1)

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Photo courtesy Carly Calvin, NCAR

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  1. NSF C-130 Platform Report Robert Wood • (a) 20oS Cross-Sections [4 full missions+5 partial missions] • - to characterize structure of MBL, aerosols, clouds along the 20oS parallel from 72-85oW • - collaborative (RHB, BAe-146, Do-228, G-1) (b) POC Drift missions [5 missions including 1 POC Lagrangian with BAe-146] - investigate structure of boundary betweenclosed and open cellular stratocumulus (c) Pollution Surveys [2 missions total] - coast-parallel surveys to 30oS to study how pollutants are transported into the MBL MISSIONS • RAF instruments: • Microphysics, Turbulence, Thermodynamics suite, Radiation • Special Remote sensing: • Wyoming Cloud Radar (zenith+nadir+slant), Cloud Lidar (zenith), Microwave radiometer (GVR, 183 GHz, zenith) • Special Chemistry/aerosols/clouds: • CCN, CVI, Streakers, Giant CCN, Special CN counters (+ultrafine), LDMA, RDMA, Aerosol Mass Spec, volatility, nephelometer, SP2/PSAP, DMS/SO2,Cloud water collector, CO/O3, fast FSSP INSTRUMENTS Photo courtesy Carly Calvin, NCAR

  2. 2.0 1.6 1.2 0.8 20oS Missions Boundary layer depth [all 20oS missions] remarkable synoptic variability 20oS/85oW height [km] 20oS parallel 86 82 78 74 70oW Wyoming cloud radar – widespread drizzle 2.5 2.0 1.5 1.0 0.5 0 Relative humidity – very dry free troposphere height [km] 85 80 75 70oW

  3. POC Missions 10 km Optically thin cell centers • Lowest CN concentration ever measured • Remarkable contrasts in microphysics and cloud dynamics across POC boundary [aerosols, drizzle, cloud structure and morphology, CO and O3] • Ultraclean clouds in optically-thin cloud centers • Quasi-linear boundary cells with copious drizzle scavenge aerosols Optically thick cell walls

  4. [SO2] ppt Pollution survey missions Elevated SO2 layers entraining into MBL RF12, November 11th 2008 Cloud Diurnal flushing of continental air Santiago

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