ABSTRACT This research analyzes the relationship between tropical cyclones and fine particulate matter (PM2.5) for landfalling Atlantic tropical cyclones from 2000 to 2015. Daily mean PM2.5 concentrations were collected from the United States Environmental Protection Agency. Tropical cyclone data were acquired from Tropical Prediction Center Best Track Reanalysis in Unisys weather. GRIdded Binary (GRIB formatted) data were downloaded from the Data Support Section of the Computational and Information Systems Laboratory at the National Center for Atmospheric Research (NCAR). Tracks of tropical cyclones were overlaid with the interpolated daily mean PM2.5 concentration value. Results suggest that, in general, tracks are distant from areas with the largest PM2.5 concentrations. To examine the cause-effect nature of this relationship, simulation using the Weather Research and Forecasting (WRF) model suggests that the intensity of Hurricane Lili was weakened only after passing the most PM2.5-polluted area in Louisiana. This result suggests that aerosol loading may weaken the intensity of tropical cyclones, at least in some cases.

中文翻译：

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颗粒物对墨西哥湾热带气旋的影响

摘要 本研究分析了 2000 年至 2015 年登陆大西洋热带气旋的热带气旋与细颗粒物 (PM2.5) 之间的关系。每日平均 PM2.5 浓度来自美国环境保护署。热带气旋数据是从 Unisys 天气中的热带预测中心最佳航迹再分析中获得的。GRIdded 二进制（GRIB 格式）数据是从国家大气研究中心 (NCAR) 计算和信息系统实验室的数据支持部分下载的。热带气旋的轨迹与内插的每日平均 PM2.5 浓度值重叠。结果表明，一般而言，轨道远离 PM2.5 浓度最大的区域。为了检查这种关系的因果性质，使用天气研究和预测 (WRF) 模型进行的模拟表明，飓风莉莉的强度只有在经过路易斯安那州 PM2.5 污染最严重的地区后才会减弱。这一结果表明，至少在某些情况下，气溶胶载荷可能会减弱热带气旋的强度。