大气对白天近地面亚硝酸（HONO）与二氧化氮（NO2）关系的限制作用。
An Atmospheric Constraint on the NO2 Dependence of Daytime Near-Surface Nitrous Acid (HONO).
机构信息
Department of Chemistry, University of California, Berkeley , Berkeley, California 94720, United States.
Department of Chemistry, University of Toronto , Toronto, Ontario M5S 3H6, Canada.
出版信息
Environ Sci Technol. 2015 Nov 3;49(21):12774-81. doi: 10.1021/acs.est.5b02511. Epub 2015 Oct 14.
Recent observations suggest a large and unknown daytime source of nitrous acid (HONO) to the atmosphere. Multiple mechanisms have been proposed, many of which involve chemistry that reduces nitrogen dioxide (NO2) on some time scale. To examine the NO2 dependence of the daytime HONO source, we compare weekday and weekend measurements of NO2 and HONO in two U.S. cities. We find that daytime HONO does not increase proportionally to increases in same-day NO2, i.e., the local NO2 concentration at that time and several hours earlier. We discuss various published HONO formation pathways in the context of this constraint.
最近的观察结果表明，大气中存在大量未知的白天亚硝酸（HONO）来源。已经提出了多种机制，其中许多涉及在某种时间尺度上还原二氧化氮（NO2）的化学过程。为了研究白天 HONO 来源与 NO2 的关系，我们比较了美国两个城市的工作日和周末的 NO2 和 HONO 测量结果。我们发现，白天 HONO 的增加与当天和数小时前的本地 NO2 浓度不成比例，也就是说，白天 HONO 的增加与当天的 NO2 增加不成比例。我们在这个限制条件下讨论了各种已发表的 HONO 形成途径。
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