ORISAM-TM4:一种新的包括SOA形成的全球剖面多组分气溶胶模型——重点关注碳质BC和OC气溶胶

IF 2.3 4区 地球科学 Q3 METEOROLOGY & ATMOSPHERIC SCIENCES
B. Guillaume, C. Liousse, R. Rosset, H. Cachier, P. Velthoven, B. Bessagnet, N. Poisson
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引用次数: 17

摘要

很少有全球气溶胶模式处理大小不同的无机/有机颗粒。其中明确处理二次有机气溶胶(SOA)形成的就更少了。在这种情况下,我们将全球化学输送模型(CTM) TM4 (Van Velthoven等人,1996年)和气溶胶截面模型ORISAM(有机和无机截面气溶胶模型,Bessagnet等人,2002年)结合起来。这种新的气溶胶模型ORISAM-TM4可以适应气溶胶大小分布与可变数量的直径截面(箱)之间0.04 μ m和超过10 μ m和详细的有机/无机化学加上可选的气体方案。给出了两个模型版本:一个是跟踪器版本,另一个是带有SOA形成的完整详细的八箱版本。重点是碳质BC(黑碳)和OC(有机碳)气溶胶。首先,讨论了ORISAM和TM4的重大进展,并结合了BC和初级OC (OCp)的最新排放清单。然后,将模拟的空气和降水中的BC和OC浓度与全球测量值进行一般比较。同样对于不列颠哥伦比亚省,使用不同的最新化石燃料排放清单进行敏感性测试的重点是欧洲,那里的排放控制取得了巨大进展。示踪剂版本对主要在背景和远程位置的BC总体上令人满意,但对总OC则不满意。对于后者,由于在ORISAM-TM4中合并了SOA形成,而不是像大多数现有模型那样,将OC简单地估算为与OCp成比例,从而产生了相当大的改进。最后给出了结论和展望。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
ORISAM-TM4: a new global sectional multi-component aerosol model including SOA formation - Focus on carbonaceous BC and OC aerosols
Few global aerosol models deal with size differentiated inorganic/organic particles. Among them, still fewer ones explicitly treat secondary organic aerosol (SOA) formation. In this context, we have coupled the global chemistry-transport model (CTM) TM4 (Van Velthoven et al., 1996) and the aerosol sectional model ORISAM (ORganic and Inorganic Sectional Aerosol Model, Bessagnet et al., 2002). This new aerosol model ORISAM-TM4 can accommodate aerosol size distributions with a variable number of diameter sections (bins) between 0.04 mu m and over 10 mu m and detailed organic/inorganic chemistry coupled with optional gas schemes. Two model versions are presented: a tracer version and a fully detailed eight-bin version with SOA formation. Focus is made on carbonaceous BC (black carbon) and OC (organic carbon) aerosols. First, significant developments both in ORISAM and in TM4 are discussed in line with the incorporation of updated emission inventories of BC and primary OC (OCp). Then, general comparisons are made between simulated BC and OC concentrations in air and precipitation against worldwide measurements. Also for BC, sensitivity tests using different updated fossil fuel emission inventories are focused over Europe, where emission controls make great strides. The tracer version appears generally satisfactory for BC mostly at background and remote sites, but not for total OC. For this latter, quite significant improvements result from the incorporation of SOA formation in ORISAM-TM4, instead of estimating OC as being simply proportional to OCp, as done in most existing models. Conclusions and prospects are then given.
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期刊介绍: Tellus B: Chemical and Physical Meteorology along with its sister journal Tellus A: Dynamic Meteorology and Oceanography, are the international, peer-reviewed journals of the International Meteorological Institute in Stockholm, an independent non-for-profit body integrated into the Department of Meteorology at the Faculty of Sciences of Stockholm University, Sweden. Aiming to promote the exchange of knowledge about meteorology from across a range of scientific sub-disciplines, the two journals serve an international community of researchers, policy makers, managers, media and the general public.
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