应土木工程与力学学院、西部灾害与环境力学教育部重点实验室邀请，西湖大学的宫先达博士将于2023年12月7日做学术报告，欢迎广大师生参加。
- 报告题目：Arctic warming by abundant fine sea salt aerosols from blowing snow
- 报 告 人：宫先达 博士
- 报告时间：2023年12月7日（星期四）9:00-11:00
- 报告地点：祁连堂327 会议室
- 主 持 人：黄宁 教授
报告人简介
宫先达，2020年获得了莱布尼茨对流层研究所颁发的气象学博士学位，之后在圣路易斯的华盛顿大学担任博士后研究员，于2023年加入西湖大学，担任首席研究员。研究方向是量化大气气溶胶对偏远海洋环境和极地地区的辐射、云和气候的影响。在《自然地球科学》、《AGU进展》、《美国气象学会公报》、《大气化学与物理》等期刊上发表了18篇高水平论文。
报告摘要
The Arctic warms nearly four times faster than the global average, and aerosols play an increasingly important role in Arctic climate change. Here we present observational evidence of abundant sea salt aerosol production from blowing snow in the central Arctic. Blowing snow was observed more than 20% of the time from November to April. The sublimation of blowing snow generates high concentrations of fine-mode sea salt aerosol (diameter below 300 nm), enhancing cloud condensation nuclei concentrations up to tenfold above background levels. Using a global chemical transport model, we estimate that from November to April north of 70° N, sea salt aerosol produced from blowing snow accounts for about 27.6% of the total particle number, and the sea salt aerosol increases the longwave emissivity of clouds, leading to a calculated surface warming of +2.30 W m−2 under cloudy sky conditions.