Black Carbon properties for warm season May-August 2022 at two urban sites in Vilnius (Lithuania) and Warsaw (Poland)

This data contain images of the obtained backward trajectories calculated with the Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) model [1]. The HYSPLIT was used to calculate 72-hours isentropic backward trajectories (using GDAS1 input) ending at 500 and 1000 m a.s.l. at the locations of the Warsaw (Poland) and Vilnius (Lithuania) sites at 12 UTC for each day over the entire sampling campaign (1st May to 20th August, 2022). The dataset contains images of the trajectories generated with the HYSPLIT online tool. The backward trajectories were used to assess the black carbon (BC) properties for warm season May-August 2022 at both sites.The Warsaw measurement site of the Faculty of Physics at the University of Warsaw (52°13′ N, 20°54′ E; 112 a.s.l.) is located about 3 km southwest of the city centre, surrounded by commercial and residential buildings, green municipal parks, and a University Campus Park, without obvious effects from industry (thus considered an urban site). The main pollution sources at the Warsaw site are residential and transport activities [2].The Vilnius measurement site is located in the low-energy building of the SRI Centre for Physical Sciences and Technology (54°43′ N, 25°19’ E; 131 a.s.l.) about 6 km northeast of the city centre, surrounded mainly by residential and science campus buildings and forested areas, thus considered an urban background site. The main pollution sources at this site are also residential and transport activities [3].References:[1] Stein A.F., R.R. Draxler, G.D. Rolph, B.J.B. Stunder, M.D. Cohen, F. Ngan, NOAA's HYSPLIT atmospheric transport and dispersion modeling system, Bull. Am. Meteorol. Soc., 2015, 96 (12), 2059-2077, https://doi.org/10.1175/BAMS-D-14-00110.1[2] Stachlewska I.S., M. Samson, O. Zawadzka, K.M. Harenda, L.Janicka, P. Poczta, et al. Modification of Local Urban Aerosol Properties by Long-Range Transport of Biomass Burning Aerosol, Remote Sens., 2018, 10, 412, https://doi.org/10.3390/rs10030412[3] Garbarienė I., J. Pauraitė, D. Pashneva, A. Minderytė, K. Sarka, V. Dudoitis, et al. Indoor-outdoor relationship of submicron particulate matter in mechanically ventilated building: chemical composition, sources and infiltration factor, Build Environ., 2022, 222, Article 109429, https://doi.org/10.1016/j.buildenv.2022.109429ATTENTION:We offer a free access to this dataset. The user is however encouraged to share the information on the data use with Remote Sensing Laboratory by sending an e-mail to [e-mail] the case this dataset is used for a scientific communication (publication, conference contribution, thesis) we would kindly ask to acknowledge this data provision by adding the following statement in Acknowledgments: "We acknowledge the data originators A.Minderytė, S.Byčenkienė, and I.S.Stachlewska for the quality-assurance, evaluation, and provision of data sets of the Center for Physical Sciences and Technology (FTMC) in Vilnius and the Remote Sensing Laboratory at the Faculty of Physics of the University of Warsaw (RS-Lab UW)."

本数据集包含利用混合单粒子拉格朗日综合轨迹（Hybrid Single-Particle Lagrangian Integrated Trajectory, HYSPLIT）模型[1]计算得到的后向轨迹图像。本研究采用HYSPLIT模型，以GDAS1气象数据为输入，针对2022年5月1日至8月20日的全采样周期内每日协调世界时（UTC）12时的观测点位，计算得到终点位于波兰华沙与立陶宛维尔纽斯观测站点、海拔500米与1000米的72小时等熵后向轨迹。本数据集包含HYSPLIT在线工具生成的轨迹图像，上述后向轨迹被用于评估2022年5-8月暖季两个观测站点的黑碳（black carbon, BC）特性。

波兰华沙大学物理学院观测站点（北纬52°13′，东经20°54′；海拔112米），距离市中心西南约3公里，周边环绕商业与住宅建筑、城市绿地公园及大学校园园区，无明显工业活动影响，因此被归类为城市站点。该站点的主要污染源为居民生活与交通活动[2]。

立陶宛物理科学与技术中心（SRI Centre for Physical Sciences and Technology）低能耗建筑内的观测站点（北纬54°43′，东经25°19′；海拔131米），距离市中心东北约6公里，周边以住宅、科研园区建筑及林区为主，因此被归类为城市背景站点。该站点的主要污染源同样为居民生活与交通活动[3]。

参考文献：
[1] Stein A.F., Draxler R.R., Rolph G.D., Stunder B.J.B., Cohen M.D., Ngan F. NOAA的HYSPLIT大气传输与扩散模拟系统，美国气象学会公报，2015, 96(12): 2059-2077, https://doi.org/10.1175/BAMS-D-14-00110.1
[2] Stachlewska I.S., Samson M., Zawadzka O., Harenda K.M., Janicka L., Poczta P. 等. 生物质燃烧气溶胶长距离传输对城市局地气溶胶特性的改造，遥感，2018, 10, 412, https://doi.org/10.3390/rs10030412
[3] Garbarienė I., Pauraitė J., Pashneva D., Minderytė A., Sarka K., Dudoitis V. 等. 机械通风建筑内亚微米颗粒物的室内外关系：化学组成、来源与渗透因子，建筑与环境，2022, 222, 文章编号109429, https://doi.org/10.1016/j.buildenv.2022.109429

重要提示：本数据集免费开放获取。建议使用者将数据使用相关信息通过邮件发送至[e-mail]告知遥感实验室。若本数据集用于学术传播（包括期刊论文、会议报告、学位论文等），请在致谢部分添加如下声明："本研究感谢立陶宛物理科学与技术中心（FTMC）的A.Minderytė、S.Byčenkienė及I.S.Stachlewska团队，以及华沙大学物理学院遥感实验室（RS-Lab UW）对本数据集的质量保障、评估与提供。"