Transmitted light for understanding aerosol and clouds
Aerosol, clouds, and their interactions contribute to the largest uncertainties in predicting future climate and understanding atmospheric processes. Transmitted light, through airborne sunphotometry and cloud radiometry, is able to quantify aerosol and cloud properties useful for disentangling atmospheric processes and reduce uncertainties by measuring these quantities in locations of specific interest. I present here an overview of aerosol and cloud properties measured by a hyperspectral airborne sunphotometer and sky radiometer and hyperspectral irradiance measurements. Examples presented here come from various field mission measurements. I will present basic measurement and retrieval techniques and how these measurements are used to answer some science questions. Examples presented here will be: contrasting estimates of cloud radiative effect of cirrus outflow from a tropical storm, quantifying the change in cloud properties crossing the sea ice edge in the Beaufort sea during sea ice minimum, quantifying the aerosol burden from biomass burning over clouds in the South East Atlantic, and accessing the vertical profile of aerosol spectral dependence for determining the source of aerosols in the vicinity of the Korean peninsula.
BIOGRAPHY:Samuel LeBlanc, French-Canadian, born in New-Brunswick, Canada. Undergraduate degree in Physics, specialisation in photonics at the University of Ottawa, graduated in 2008. Masters and Ph.D at the University of Colorado, Department of Atmospheric and Oceanic Sciences, Boulder, Colorado, with advisor Peter Pilewskie. Graduated in January 2014. Post-doctoral fellow at NASA Ames Research Center, with Jens Redemann as advisor. (2014-2016) Research Scientist at Bay Area Environmental Research Institute, a cooperative institute at NASA Ames Research Center, 2016-present.