报告题目：Uncovering Hurricane Harvey’s storm deposition in the Aransas National Wildlife Refuge, Texas
报告人：Dr. Qiang Yao（姚强）
Dr. Qiang Yao为路易斯安那州立大学海洋与海岸系博士后，主要研究方向是古环境学、海岸生态学和孢粉学。
Few studies have documented the characteristics of storm deposits associated with a modern hurricane. Hurricane Harvey (2017) caused extensive flooding in coastal Texas due to a combination of storm surge and heavy precipitation. This study investigates the depositional process associated with Hurricane Harvey by means of loss-on-ignition (LOI) and X-ray fluorescence (XRF) analyses of 25 short cores collected from the Aransas National Wildlife Refuge ANWR, Texas. A distinct washover sand layer was recorded at all coring sites, and the intrusion of storm deposits can be detected by a peak in the chlorine/bromine (Cl/Br) ratio of most sediment cores. Our study shows that Cl/Br ratios are higher in coastal environments than in terrestrial environments, thereby confirming that this elemental ratio can be used as a salinity indicator and, as a corollary, evidence of marine intrusion into lower-salinity environments.