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Study on the Atmospheric Deposition of Reactive Nitrogen and Impacts on the Ecosystem. Dr. Jiani Tan, 2024-10-30
24 October 2024, 10:24 AM
Speaker: Dr. Jiani Tan
报告人：谈佳妮
Title: Study on the Atmospheric Deposition of Reactive Nitrogen and Impacts on the Ecosystem
报告题目： 大气活性氮沉降及其生态影响的研究
Date: 2024-10-30
Time: 15:00-16:30
Room: ES354
Host: Dr. Qing Mu
主持人：穆青
Tencent Meeting ID: 748-5683-7998
Abstract:
Reactive nitrogen serves as an essential nutrient for the terrestrial ecosystem. However, high level of deposition that exceeded the natural threshold and resilience could alert the ecosystem, leading to acidification and eutrophication of the terrestrial ecosystems, and therefore causing a series of adverse impacts. To investigate the characteristics of nitrogen deposition, we employed measurements from monitoring networks, chemical transport models and machine learning approaches to construct global- and regional-scale nitrogen deposition mappings. We then investigated the driving factors of nitrogen deposition by conducting sensitivity tests. Finally, we assessed the impacts on the ecosystem by assessing the influence on natural nutrient budget and carbon sink potential. The findings highlighted the need for accurate estimation on nitrogen deposition and suggested a comprehensive assessment on the potential influences on the environment and human living.
摘要：
活性氮是陆地生态系统必需的营养物质。然而，活性氮沉降量超过自然生态负荷会导致酸化和富营养化等一系列不利影响。本研究采用场地采样数据集、三维数值模型和机器学习等方法，构建全球和区域尺度的活性氮沉降分布数据，利用敏感性测试探究活性氮沉降的驱动因素，通过估算氮沉降对生态氮营养收支平衡和生态碳汇潜力的影响来评估氮沉降对生态系统的影响。研究结果强调了准确估算氮沉降的必要性，并呼吁进一步开展其对生态环境和人类生活潜在影响的全面评估。
Biography：
Dr. Tan is an associate professor of Shanghai University and a high-level overseas talents introduced by Shanghai. She received Ph.D. from the University of Tennessee, United States, and continued postdoctoral research at Max Planck Institute for Chemistry, Germany. Dr. Tan joined the School of Environmental and Chemical Engineering of Shanghai University in 2023. She has published more than 20 SCI papers in top international journals such as PNAS, ACP, EST, etc. Her research focus on atmospheric nitrogen budget, synergetic control of environmental pollution and carbon emissions, and application of deep learning to atmospheric science.
嘉宾介绍：
谈博士是上海大学副研究员，上海市高层次海外引进人才。她于美国田纳西大学获得博士学位，随后在德国马克斯普朗克化学所开展博士后研究，2023年加入上海大学环境与化学工程学院。谈博士在PNAS、ACP、EST等国际顶级期刊发表SCI论著20余篇。主要从事大气氮收支、减污降碳、以及深度学习在大气科学运用等方面的研究。
Look forward to seeing you!
Liwen Wu