- Conference date: 6–10 August 2012
- Location: Dahlem Cube, Free University, Berlin
Improving near-cloud aerosol measurements is important for better understanding two critical aspects of climate, aerosol-cloud interactions and the direct radiative effect of aerosols. This study aims at better understanding the uncertainties that arise in satellite measurement of aerosols because current data interpretation methods don’t consider 3D radiative processes. For this, the paper presents a statistical analysis of a yearlong global dataset of co-located MODIS and CALIOP observations and theoretical simulations. The results reveal that CALIOP-observed particle size and optical thickness, and MODIS-observed solar reflectance increase systematically in a wide zone around clouds. It is estimated that near-cloud changes in particle populations (including aerosols and undetected cloud particles) are responsible for roughly two thirds of the observed increase in 0.55 μm MODIS reflectance. The results also indicate that 3D radiative processes play an important role in near-cloud reflectance enhancements, while instrument blurring plays a modest role.
- Radiative processes
- Statistical analysis
- Aerosol and cloud effects
- Electric measurements
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