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Beat Schmid et al. BAER Institute, Sonoma, CA Presented by Michael Box

Airborne sunphotometer measurements of aerosol in ACE-Asia and their comparisons to correlative measurements. Beat Schmid et al. BAER Institute, Sonoma, CA Presented by Michael Box University of New South Wales, Sydney. Co-authors.

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Beat Schmid et al. BAER Institute, Sonoma, CA Presented by Michael Box

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  1. Airborne sunphotometer measurements of aerosol in ACE-Asia and their comparisons to correlative measurements Beat Schmid et al. BAER Institute, Sonoma, CA Presented by Michael Box University of New South Wales, Sydney

  2. Co-authors Hegg, D, Covert, D, Univ. of Washington, Atmospheric Sciences, WA Hsu, C, Welton, E, GEST/UMBC, NASA Goddard Space Flight Center, Greenbelt, MD Redemann, J, Bay Area Environmental Research, Institute, Sonoma, CA Livingston, J , SRI, International, Menlo Park, CA Russell P, NASA, Ames Research Institute, Moffett Field, CA Wang, J, Flagan, R, Seinfeld, J, California Institute of Technology, Pasadena, CA Bates, D, University of, Miami, Coral Gables, FL Jonsson, H, CIRPAS, Marina, CA

  3. Make Observations to Improve Models of Aerosol Concentrations and Impacts. Title Slide 16

  4. Satellite, Ship and Aircraft Platforms in ACE-Asia

  5. Groundbased observations Lidars, aerosol chemistry & physics, optical properties, and radiation

  6. NASA Ames Airborne Sunphotometers (AATS) AOD (350-1558 nm) and H2O AATS-6 AATS-14 C-130 Twin Otter

  7. ACE-Asia C-130 Flight Tracks C-130 Twin Otter Ron Brown

  8. Flying low over the ocean Validation of SeaWiFS AOD (Hsu et al. algo) with Aircraft Sun photometer Validation

  9. AATS vertical profiles during ACE-Asia l AATS-14 l AATS-6

  10. Absorption Particle Soot Absorption Photometer (PSAP, =550nm) noisy (averaging) low RH Corrections scattering contribution inlet-cutoff (Da=8m)* correct to ambient RH* Scattering Nephelometers  = 450, 550, 700 nm, low RH  = 550 nm, RH=20,60,85% Corrections light source angular truncation (7°-170°) inlet-cutoff (Da=8m)* correct to ambient RH In situ measurement ofExtinction= + *correction not required or done

  11. Closure between airborne sunphotomter and in-situ

  12. Closure between airborne sunphotomter and in-situ for 9 profiles

  13. In situ measurement of size distribution and computation of extinction • Twin DMA, D=15-1000 nm (close to ambient RH) • Aerodynamic Particle Sizer, D=0.5 - 8 mm (drier than ambient RH), • adjust to ambient RH • compute extinction, needs m } needs composition Wang et al. 2002, JGR (submitted)

  14. Wang et al. subm. JGR, 2002

  15. Closure experiment with airborne sunphotometer and lidar on ship R/V Ron Braun CIRPAS Twin Otter Twin Otter Ron Brown

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