黑碳团簇气溶胶混合生长的红外吸收特性及长波辐射效应

发布时间：2018-01-05 07:34

本文关键词：黑碳团簇气溶胶混合生长的红外吸收特性及长波辐射效应　出处：《物理学报》2017年16期 　论文类型：期刊论文

【摘要】：黑碳气溶胶是当前气溶胶辐射强迫评估中最不确定的因子.本文通过构建黑碳的微物理模型,分别模拟了新鲜状态的黑碳气溶胶和混合生长(老化)后被硫酸盐包裹的黑碳气溶胶,利用叠加T矩阵方法计算获得了具有团簇形态和多成分混合的黑碳气溶胶红外吸收特性,通过大气辐射传输模型模拟了黑碳气溶胶的长波辐射强迫,分析了典型理化参数的敏感性.发现黑碳混合生长可以显著增强其大气层顶的长波辐射强迫,最高可达3倍.而且,包裹黑碳的硫酸盐半径越大,将明显增强大气层顶的黑碳长波辐射强迫.这些发现将有助于降低黑碳气溶胶气候效应评估的不确定性.
[Abstract]:Black carbon aerosol is the most uncertain factor in aerosol radiation forcing assessment. The fresh black carbon aerosols and the black carbon aerosols which were encapsulated by sulfate after mixed growth (aging) were simulated respectively. Infrared absorption characteristics of black carbon aerosol with cluster morphology and multi-component mixing were obtained by superposition T matrix method. The long-wave radiation forcing of black carbon aerosol was simulated by atmospheric radiation transfer model. The sensitivity of typical physical and chemical parameters was analyzed. It was found that black carbon mixed growth could significantly enhance the long-wave radiative forcing on the top of its atmosphere, up to 3 times. Moreover, the larger the sulfate radius of the black carbon was. These findings will help reduce uncertainty in the assessment of the climate effects of black carbon aerosols.
【作者单位】：中国科学院遥感与数字地球研究所;中国科学院大学;
【基金】：国家自然科学基金(批准号:41401386,41371015,41001207) 国家高分辨率对地观测系统重大专项(批准号:30-Y20A21-9003-15/17) 遥感科学国家重点实验室开放基金(批准号:OFSLRSS201619)资助的课题~~
【分类号】：X513
【正文快照】： 1引言黑碳由化石燃料、生物燃料和生物质等不完全燃烧形成,是气候增温效应仅次于二氧化碳的人为源[1-3].黑碳气溶胶颗粒的微观形态非常复杂,一般在排放初期的新鲜状态下呈现为数百个小粒子聚集成的团簇状[4,5].在大气中,黑碳与硫酸盐、硝酸盐、有机物、沙尘等不同成分的气溶胶

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