报告题目：Asian Long-Range Transport in Relation to Atmospheric Rivers in Northern California

报告摘要：The study investigates the effect of aerosol long-range transport on precipitation over Northern California during atmospheric river (AR) events in the 2017 cold season (January–April). ARs in 2017 were one of the strongest to date, and the intense precipitation associated with the ARs resulted in flooding, destruction of property, and contamination of water supplies. The Aerosol Optical Depth (AOD) from Moderate Resolution Imaging Spectroradiometer (MODIS) data shows Asian dust traveling across the Northern Pacific Ocean along with AR events. Aerosol measurements in California, provided by the Interagency Monitoring of Protected Visual Environments (IMPROVE), show that more Asian dust tends to be observed over the coast, while non-Asian/localized dust is observed inland. A mixture of Asian and localized dust is observed over the mountains, although higher amounts of both are observed in the spring (March–April). Back trajectory analysis confirms that Asian aerosols are transported along the air parcels, and each AR event has its own transport pattern in terms of horizontal advection and vertical lifting. Correlation between precipitation and aerosols is low. This suggests that aerosols contribute little to the decrease of local precipitation during the 2017 AR events.

报告时间：2019年6月11日下午2：00-3：00

报告地点：气象楼423

报 告  人：Sen Chiao 教授

主 持  人： 罗京佳 教授

专家简介：

 Sen Chiao，2003年获得North Carolina State University博士学位，2004年在哈佛大学从事了一年的博士后研究，之后进入圣何塞州立大学从事教学科研工作，2011年获得终身教授职位。Sen Chiao教授的研究领域非常广泛，包括大气河流降水的观测与模拟，行星边界层，热带气旋，平流层臭氧的时空变率，气溶胶和生物质燃烧的远程输送及其影响等。发表高质量SCI论文50多篇。现担任十余个杂志的审稿专家以及多个杂志的编辑。

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2019年6月10日