通过气溶胶消光光谱测定的过冷液态水和冰的频率相关复折射率。

Frequency dependent complex refractive indices of supercooled liquid water and ice determined from aerosol extinction spectra.

作者信息

Zasetsky A Y, Khalizov A F, Earle M E, Sloan J J

机构信息

Department of Chemistry, University of Waterloo, Waterloo, Canada.

出版信息

J Phys Chem A. 2005 Mar 31;109(12):2760-4. doi: 10.1021/jp044823c.

DOI:10.1021/jp044823c

PMID:16833588

Abstract

Complex refractive indices of supercooled liquid water at 240, 253, 263, and 273 K, and ice at 200, 210, and 235 K in the mid infrared from 460 to 4000 cm(-1) are reported. The results were obtained from the extinction spectra of small (micron-size) aerosol particles, recorded using the cryogenic flow tube technique. An improved iterative procedure for retrieving complex refractive indices from extinction measurements is described. The refractive indices of ice determined in the present study are in good agreement with data reported earlier. The temperature region and range of states covered in the present work are relevant to the study of upper tropospheric and stratospheric aerosols and clouds.

摘要

报道了过冷液态水在240、253、263和273K以及冰在200、210和235K时，在460至4000cm⁻¹中红外波段的复折射率。结果是通过使用低温流动管技术记录的小（微米级）气溶胶颗粒的消光光谱获得的。描述了一种从消光测量中检索复折射率的改进迭代程序。本研究中确定的冰的折射率与先前报道的数据高度一致。本工作涵盖的温度区域和状态范围与对流层上部和平流层气溶胶及云的研究相关。