Preliminary Results from the Prototype Thin-Cloud Rotating Shadowband Radiometer
| Mary Jane Bartholomew | Brookhaven National Laboratory |
| R. Reynolds | Remote Measurements & Research Company (RMR Co.) |
| Andrew Vogelmann | Brookhaven National Laboratory |
| Qilong Min | State University of New York at Albany |
| Ray Edwards | Brookhaven National Laboratory |
| Scott Smith | Brookhaven National Laboratory |
Category: Cloud Properties
The Thin-Cloud Rotating Shadowband Radiometer is a prototype instrument intended to simultaneously retrieve cloud optical depth and effective drop radius in clouds with low liquid water paths (< 100g/m2). Following its design and testing in the summer and fall 2007, it was deployed at the Southern Great Plains site from early January into early February this year. During this time, a number of observations were made to test the measurement strategy and instrument performance. The radiometer measures the angular distribution of scattered light in the forward scattering lobe of cloud drops in six narrow spectral bands each approximately 10 nanometers wide and centered at 415, 500, 610, 660, 870, and 940nm. Modeling simulations (Min and Duan 2005) indicate that accuracies for cloud optical depth, effective radius, and liquid water path are 2%, 10%, and 2g/m2.
Min, Q., and M. Duan. 2005. Simultaneously retrieving cloud optical depth and effective radius for optically thin clouds, J. Geophys. Res., 110, D21201, doi:10.1029/2005JD006136. .
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