Measured and simulated vertical profiles of nitrous acid—Part I: Field measurements
Measured and simulated vertical profiles of nitrous acid—Part I: Field measurements
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DOI：
10.1016/s1352-2310(03)00242-5
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发表时间：
2003-07
影响因子：
5
通讯作者：
J. Kleffmann;R. Kurtenbach;J. Lörzer;P. Wiesen;N. Kalthoff;B. Vogel;H. Vogel
中科院分区：
文献类型：
--
作者：
J. Kleffmann;R. Kurtenbach;J. Lörzer;P. Wiesen;N. Kalthoff;B. Vogel;H. Vogel
在德国卡尔斯鲁厄研究中心的气象塔上，利用一种新型的、非常灵敏的HONO仪器、一种商用的NOx监测仪和一种SMPS系统，首次同时测量了10- 190 m高度范围内夜间HONO、NO、NO2和颗粒物表面积密度梯度。对于活动期间的所有梯度测量，观察到[HONO]/[NO2]比随着海拔低于100米而降低。相反，发现颗粒表面积密度或多或少是恒定的。因此，没有观察到[HONO]/[NO2]比和颗粒表面积密度之间的相关性，表明HONO的形成主要是由地面上的过程和颗粒表面上的显着的HONO形成可以排除测量网站。除了夜间梯度测量外，在恒定高度观察到白天高的HONO浓度，这表明白天HONO的来源很重要，但尚不清楚。此外，从现场活动中估计直接排放的HONO/NOx比为0.8%。
Simultaneous nighttime HONO, NO, NO2and particle surface area density gradients in the altitude range 10–190m were measured for the first time on the meteorological tower at the Forschungszentrum Karlsruhe/Germany using a new, very sensitive HONO instrument, a commercial NOxmonitor and a SMPS system. For all gradient measurements during the campaign it was observed that the [HONO]/[NO2] ratio decreased with increasing altitude below 100m. In contrast, the particle surface area density was found to be more or less constant. Accordingly, no correlation between the [HONO]/[NO2] ratio and the particle surface area density was observed showing that HONO formation was dominated by processes on ground surfaces and that significant HONO formation on particle surfaces could be excluded for the measurement site. Besides the nighttime gradient measurements, high daytime HONO concentrations were observed at constant altitude, which point to a significant and yet unknown daytime source of HONO. In addition, a HONO/NOxratio from direct emissions of 0.8% was estimated from the field campaign.