报告题目

利用区域地球系统模式RIEMS-Chem研究海洋生物源排放及其气候效应

Title:

A Study of Marine Biogenic Emissions and Their Climate Effects Using the Regional Earth System Model RIEMS-Chem

报告人——李嘉伟

Lecturer: Jiawei Li

李嘉伟，男，博士，副研究员，中国科学院大气物理研究所（中国科学院东亚区域气候-环境重点实验室），主要从事大气环境模拟、气溶胶来源、输送、理化过程（表面非均相化学、吸湿增长）、辐射和气候效应及其影响等方面的理论研究和模式发展应用工作，作为主要研发人员之一参与中国科学院大气物理研究所自主研发的区域地球系统模式(REMS: RIEMS-Chem)的研发，负责大气化学/气溶胶相关模块的发展、耦合、评估测试等工作。近年主要研究内容：定量计算了冬季重污染期间北京PM2.5本地源和区域输送的相对贡献；研究了华北地区冬季重霾期间气溶胶-辐射-边界层气象相互作用机制，发现气溶胶化学过程（非均相反应和热力学平衡过程）促进了二次无机盐气溶胶的生成，加剧重霾过程；基于观测资料改进了模式中气溶胶吸湿增长因子的参数化，并结合模式和卫星资料分析了中国东部气溶胶光学参数的垂直分布特征；建立了区域地球系统模式中的海洋源有机气溶胶和VOC排放模型，发现西北太平洋海洋源有机气溶胶浓度可与陆源相当，估算了海洋源气溶胶的辐射强迫和对天气要素的影响。曾主持国家自然科学基金、参与973项目、国家重点研发计划、重点基金和基金委国际合作项目。中国颗粒学会青年理事会理事。已发表SCI论文30余篇。

Jiawei Li, Male, Ph.D., Associate Research Professor, Institute of Atmospheric Physics of Chinese Academy of Sciences (Key Laboratory of Regional Climate and Environment for Temperate East Asia) and member of the Youth Council of the Chinese Society of Particuology, is mainly engaged in theoretical research and model development applications on atmospheric environment simulation, sources, transport and physicochemical processes (surface heterogeneous chemistry, hygroscopic growth) of aerosols, radiation, climate effects, as well as their impacts. He is responsible for the development, coupling, and evaluation testing of atmospheric chemistry and aerosol-related modules of RIEMS-Chem. In recent years, he has quantified the relative contributions of local sources and regional transport of PM 2.5 in Beijing during heavy-pollution period in winter, studied the mechanism of aerosol-radiation-boundary layer meteorological interaction during heavy-haze period in winter in North China, and found that aerosol chemical processes (heterogeneous reaction and thermodynamic equilibrium process) promote the generation of secondary inorganic aerosols and exacerbate the heavy haze process. Based on the observed data, he has improved the parameterization of aerosol hygroscopic growth factor in the model based on the observational data, and analyzed the vertical distribution characteristics of aerosol optical parameters in East China by combining the model and satellite data. Besides, he has established a model of marine organic aerosol and VOC emission model in REMS, found that the concentration of marine source organic aerosol in the northwest Pacific Ocean can be comparable to that of land-based sources, and estimated the radiative forcing of marine aerosol and its influence on weather factors. He has hosted the National Natural Science Foundation of China, participated in 973 project, National Key R&D Program of China, and International Cooperation and Exchange Program of National Natural Science Foundation of China. He has published more than 30 SCI papers.

报告内容

介绍中科院大气物理所东亚中心自主研发的区域地球系统模式(REMS)的大气化学/气溶胶分量模式RIEMS-Chem的进展和应用。

利用耦合了海洋生物源排放模型的RIEMS-Chem模式，结合西北太平洋的航测、岛站观测等资料，模拟研究西北太平洋海区海洋生物源一次有机碳气溶胶(MPOA)、VOC等排放，计算海洋生物源对海洋大气有机碳质量浓度的贡献，估算海洋源排放气溶胶的辐射效应和对天气要素的影响。对于西北太平洋春季，海洋源气溶胶里，无论质量浓度还是直接辐射效应，海盐>MPOA>>DMS气溶胶；在海洋地区，海洋源气溶胶辐射效应约占总气溶胶的29%。在东亚地区、东海和西北太平洋区域，MPOA导致的春季降水减少是总气溶胶导致降水变化的18%，32%, 22%。

Content:

The introduction of the progress and application of RIEMS-Chem, an atmospheric chemistry and aerosol component model of REMS developed independently by Institute of Atmospheric Physics, Chinese Academy of Sciences (Key Laboratory of Regional Climate and Environment for Temperate East Asia).

Using the RIEMS-Chem model coupled with the marine biogenic source emission model, combined with aerial surveys and island station observations in the Northwest Pacific Ocean, the emissions of MPOA and VOC in the Northwest Pacific Ocean are emulated and studied, the contribution of marine biogenic sources to the mass concentration of marine atmospheric organic carbon is calculated, and the radiative forcing of marine aerosol and its influence on weather factors is estimated. In the spring in the northwest Pacific, the order of both mass concentration and direct radiative effects of marine aerosols is sea salt, MPOA and DMS aerosol; in the oceanic region, the radiative effects of marine aerosols account for about 29% of the total. In the East Asian, the East China Sea and the Northwest Pacific, the reduction of precipitation due to MPOA in the spring is 18%, 32%, and 22% of the total aerosol-induced precipitation.

时间：2021年9月25日(星期六)上午10：00

地点：南海海洋资源利用国家重点实验室823室

主办：南海海洋资源利用国家重点实验室

欢迎广大教师、科研人员和研究生等踊跃参加!

Time: September 25, 2021 (Saturday), 10:00 am

Place: Room 823, MRU

Sponsor: MRU

All teachers, scientific research personnel and graduate students are welcome to attend!