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Colloquium

Department of Atmospheric Science

Tues., Sept. 25, 3:10 pm, EN6085

Optical Cloud Probe Research: Assessing the Impact of Artifacts from Imperfect Calibrations

Dr. Colin Gurganus

SPEC

Abstract

Numerous remote sensing instruments (Hyperspectral Imaging, RADAR, LIDAR, Radiometers, etc.) collect and characterize cloud properties to generate continuous data sets on many scales, but all of these measurements rely on validation from relatively sparse and imperfect in-situ observations. Due to the dynamic nature of clouds, in-cloud sampling is best performed by aircraft with probes that characterize the size, shape and phase of cloud particles. Because cloud particles sizes span many orders of magnitude, a variety of specialized probes are required for different particle size regimes from cloud droplets (D~μm) to precipitation (D~mm). I will discuss some of the cloud probes currently in use by the atmospheric sciences community today, as well as the limitations these measurements. Additionally I will present results from laboratory calibrations at SPEC, and discuss why this data is crucial for properly interpreting in-cloud observations.

 


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