<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Li, Yaowei</style></author><author><style face="normal" font="default" size="100%">Bai, Bin</style></author><author><style face="normal" font="default" size="100%">Dykema, John</style></author><author><style face="normal" font="default" size="100%">Shin, Nara</style></author><author><style face="normal" font="default" size="100%">Lambe, Andrew T.</style></author><author><style face="normal" font="default" size="100%">Chen, Qi</style></author><author><style face="normal" font="default" size="100%">Kuwata, Mikinori</style></author><author><style face="normal" font="default" size="100%">Nga Lee Ng</style></author><author><style face="normal" font="default" size="100%">Keutsch, Frank N</style></author><author><style face="normal" font="default" size="100%">Liu, Pengfei</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Predicting real refractive index of organic aerosols from elemental composition</style></title><secondary-title><style face="normal" font="default" size="100%">Geophysical Research Letters</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2023</style></year></dates><number><style face="normal" font="default" size="100%">12</style></number><volume><style face="normal" font="default" size="100%">50</style></volume><pages><style face="normal" font="default" size="100%">e2023GL103446</style></pages><isbn><style face="normal" font="default" size="100%">0094-8276</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Abstract Accurate estimates of aerosol refractive index (RI) are critical for modeling aerosol-radiation interaction, yet this information is limited for ambient organic aerosols, leading to large uncertainties in estimating aerosol radiative effects. We present a semi-empirical model that predicts the real RI n of organic aerosol material from its widely measured oxygen-to-carbon (O:C) and hydrogen-to-carbon (H:C) elemental ratios. The model was based on the theoretical framework of Lorenz-Lorentz equation and trained with n-values at 589&amp;nbsp;nm () of 160 pure compounds. The predictions can be expanded to predict n-values in a wide spectrum between 300 and 1,200&amp;nbsp;nm. The model was validated with newly measured and literature datasets of n-values for laboratory secondary organic aerosol (SOA) materials. Uncertainties of predictions for all SOA samples are within 5%. The model suggests that -values of organic aerosols may vary within a relatively small range for typical O:C and H:C values observed in the atmosphere.</style></abstract></record></records></xml>