A Study of the Optical Properties of Ice Crystals with Black Carbon Inclusions

Technical Report · Tue Sep 01 00:00:00 EDT 2015

DOI:https://doi.org/10.2172/1221862· OSTI ID:1221862

Arienti, Marco ^[1]; Yang, Xiaoyuan ^[1]; Kopacz, Adrian M ^[1]; Geier, Manfred ^[1]

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1. Sandia National Laboratories (SNL-CA), Livermore, CA (United States)

The report focu ses on the modification of the optical properties of ice crystals due to atmospheric black car bon (BC) contamination : the objective is to advance the predictive capabilities of climate models through an improved understanding of the radiative properties of compound particles . The shape of the ice crystal (as commonly found in cirrus clouds and cont rails) , the volume fraction of the BC inclusion , and its location inside the crystal are the three factors examined in this study. In the multiscale description of this problem, where a small absorbing inclusion modifies the optical properties of a much la rger non - absorbing particle, state - of - the - art discretization techniques are combined to provide the best compromise of flexibility and accuracy over a broad range of sizes .

• Research Organization: Sandia National Lab. (SNL-CA), Livermore, CA (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 1221862
• Report Number(s): SAND2015-8111; 604037
• Country of Publication: United States
• Language: English