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地球系统科学系列讲座:Toward a predictive understanding of carbon cycling and greenhouse gas emissions in the terrestrial biosphere: from C to GHG

2021-02-22

时间: 2021年2月26日(星期五)上午10:00

线上参会方式: ZOOM(会议号:673 3238 0765)

报告人: Dr. Hanqin Tian (田汉勤), Auburn University

田汉勤,美国奥本大学讲席教授、国际气候与全球变化研究中心主任。长期致力于全球变化生态学和全球生物地球化学的研究。运用生态糸统过程模型和生态大数据方法, 并结合地面观测和卫星遥感技术, 理解和定量分析全球变化下的生态系统格局和过程, 全球碳、氮循环和温室气体收支平衡,生物地球化学循环与生态水文过程的相互作用, 以及气候变化与粮食安全、水安全关系, 并取得系统性的创新成果。其自主开发的动态陆地生态系统模型(DLEM)己成为全球变化研究领域最为知名的模型之一。在Nature和Science 等核心期刊发表SCI 论文250多篇,被引用超万次。荣获首届叶笃正全球变化科学奖,哈里·墨菲 (Harry Murphy)卓越研究奖, 入选美国科学促进会和地球物理学会会士(AAAS&AGU Fellow) 。

讲座简介: The terrestrial biosphere can release or absorb the greenhouse gases (GHG), carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O), and therefore has an important role in regulating atmospheric composition and climate. Anthropogenic activities such as land-use change, agriculture and waste management have altered terrestrial biogenic GHG fluxes, and the resulting increases in CH4 and N2O emissions in particular can contribute to climate change. Although the biogenic fluxes of CO2, CH4 and N2O have been individually measured and simulated by research communities separately, an overall GHG balance of the terrestrial biosphere has not yet been sufficiently investigated. To address this challenge, we have developed a coupled biogeochemical model, the Dynamic Land Ecosystem Model (DLEM), to concurrently quantify and attribute the magnitude and spatiotemporal patterns of three major GHGs in the terrestrial biosphere and along the land-ocean aquatic continuum (LOAC), and further constraining these gas budgets by combining atmospheric inversion. Our study indicates that there is an important need toward a concurrent accounting of full GHG budget for addressing biosphere’s role in the Earth’s climate as well as developing effective climate change mitigation strategies.


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