TU2.L10 - ACCURATE MONITORING OF TERRESTRIAL AEROSOLS AND TOTAL SOLAR IRRADIANCE: THE NASA GLORY MISSION
1. ACCURATE MONITORING OF TERRESTRIAL AEROSOLS AND TOTAL SOLAR IRRADIANCE: THE NASA GLORY MISSION Bryan Fafaul, Kirk Knobelspiesse, Brian Cairns, Greg Kopp, Hal Maring, Jacek Chowdhary, Michael Mishchenko NASA GSFC, NASA GISS, NASA HQ, Columbia University, University of Colorado IGARSS July 2010
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3. Total Irradiance Monitor (TIM) continue measuring the 30-year record of Total Solar Irradiance (TSI) with improved accuracy and stability Aerosol Polarimetry Sensor (APS): role of aerosols as natural and anthropogenic agents of climate change… with much better accuracy than existing instruments Glory Instruments 2 Cloud Cameras (CC) for APS spatial context
10. A radiative transfer model is tuned to match observations Aerosol parameters that give the best match are the ‘ retrieved ’ values Radiative transfer model : Doubling and Adding (Hansen & Travis, 1974) Optimization approach : Levenberg-Marquardt Philosophy: large information content in observations means highly accurate retrievals Glory Science - Aerosols Solid lines: observation Dashed lines: model
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15. Glory Science - Aerosols Polarized reflectance in rainbow expresses cloud top droplet size Polarized reflectance away from rainbow expresses aerosol properties Work in progress… AOT=0.09 AOT=0.15 AOT=0.20 AOT=0.26 Wavelength: 865nm Refractive index: 1.47 + 0.014i Effective Radius: 0.2µm Effective Variance: 0.2 Single Scattering Albedo: 0.85 Rainbow angle indicates cloud droplet size Rainbow peak indicates aerosol absorption Side scattering reveals other aerosol properties
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18. Glory Science - TSI A lack of sufficiently accurate end to end calibration is source of the offsets TSI measurements must be accurate and connected to the existing 30-year record
19. Glory Science - TSI A lack of sufficiently accurate end to end calibration is source of the offsets TSI measurements must be accurate and connected to the existing 30-year record
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23. Acknowledgements Funding Funding for these activities was provided by the Glory Project managed by Bryan Fafaul and NASA Radiation Sciences Program managed by Hal Maring Many thanks to Chris Hostetler, Rich Ferrare, Mike Obland, Ray Rogers, John Hair , NASA Langley Research Center, Hampton, VA, USA who have allowed us to work with them on the B200. Jens Redemann , Bay Area Environmental Research Institute, Sonoma, CA, USA; Phil Russell , NASA Ames Research Center; Anthony Clarke, Cam McNaughton , University of Hawaii, Honolulu, HI, USA; Yohei Shinozuka , NASA Postdoctoral Program; Bill Conant , University of Arizona; John Seinfeld , California Institute for Technology; Bill Smith and Tom Charlock NASA Langley Research Center and Beat Schmit, DoE ACF , who have helped with data and/or field experiment participation. Dick Chandos and Ed Russell built the RSP instruments and made sure Raytheon built APS the right way!
27. Glory Science - Aerosols Polarization origins in planetary science: Hansen and Hovenier find Venus covered in clouds of sulfuric acid
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29. GLORY Observatory Front Isometric View S-Band Omni & Mast APS Instrument GLORY Observatory Rear Isometric View TIM System Instrument Module Assembly Star Trackers (x2) TIM System GPS Dual Antenna Body Mounted Solar Panel Glory Configuration Cloud Cameras (x2)
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