An extended POLIPHON conversion factor dataset for dust

This is an extended dataset of POLIPHON (POlarization LIdar PHOtometer Networking) conversion factors for retrieving dust-related CCN and INP concentration profiles over the world (Mamouri and Ansmann, 2015, 2016). The dataset is derived based on the historical AERONET (Aerosol RObotic NETwork) (Holben et al., 1998) database worldwide using the method from He et al. (2023). The converison factors include C_v_d, C_250_d, C_s_d, C_s_100_d, C_100_d, and X_d, while the corresponding linear Pearson correlation coefficients R_v_d, R_250,d, R_s_d, R_s, and R_s_100_d are also provide. In addition, aerosol optical depth (AOD) at 532 nm and Ångström exponent between 440 nm and 870 nm are also provided. The name, latitude, and longitude of each site is provided according to the information from AERONET. Overall, there are 198 AERONET sites included in this data set. Here the L15 conversion factor data set is derived using AERONET level-2.0 AOD product together with level-1.5 aerosol inversion product. Here the L20 conversion factor data set is derived using AERONET level-2.0 AOD product together with level-2.0 aerosol inversion product, which makes much fewer sites with conversion factors available.本数据集为用于全球范围内反演沙尘相关云凝结核（Cloud Condensation Nucleus, CCN）与冰核（Ice Nucleus, INP）浓度廓线的极化激光雷达测光联网（POLIPHON）转换因子扩展数据集，其原始方法源自Mamouri与Ansmann（2015、2016）的研究。本数据集依托全球历史气溶胶机器人观测网络（AERONET）数据库（Holben等，1998），结合He等（2023）提出的方法构建得到。本次数据集包含的转换因子包括C_v_d、C_250_d、C_s_d、C_s_100_d、C_100_d与X_d，同时还提供了对应的线性皮尔逊相关系数R_v_d、R_250,d、R_s_d、R_s与R_s_100_d。此外，数据集还包含532 nm处的气溶胶光学厚度（Aerosol Optical Depth, AOD）以及440 nm与870 nm波段间的安斯特朗指数（Ångström exponent）。数据集依据AERONET的公开资料，提供了各观测站点的名称、纬度与经度。本数据集总计包含198个AERONET观测站点。其中L15转换因子数据集基于AERONET的2.0级气溶胶光学厚度产品与1.5级气溶胶反演产品推导得到；而L20转换因子数据集则基于AERONET的2.0级气溶胶光学厚度产品与2.0级气溶胶反演产品推导得到，因此可获取转换因子的站点数量大幅减少。