Uptake of NO 3 and N 2 O 5 to Saharan dust, ambient urban aerosol and s
Uptake of NO 3 and N 2 O 5 to Saharan dust, ambient urban aerosol and s
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发表时间：
2010
影响因子：
6.3
通讯作者：
Mingjin Tang;J. Thieser;Gerhard Schuster;John N. Cowley
中科院分区：
文献类型：
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作者：
Mingjin Tang;J. Thieser;Gerhard Schuster;John N. Cowley
撒哈拉沙漠沙尘和环境气溶胶对NO3和N2 O 5的吸收利用一种新颖而简单的相对速率方法同时检测NO3和N2 O 5。使用腔衰荡光谱检测两种痕量气体使测量能够在低混合比下进行（15。当使用蜡烛产生的烟尘时，γ（NO3）/γ（N2 O 5）为<$1.5 -3.用我们最近测得的γ（N2 O 5）= 1 × 10 − 2的值，可以将撒哈拉沙尘的相对速率置于绝对基础上，得到γ（NO3）= 9 × 10 − 3，这比以前的单一值小得多。在目前的吸收系数下，NO3与矿物粉尘的反应一般不会对NO3在边界大气中的损失或矿物粉尘的硝化产生显著影响。15
The uptake of NO 3 and N 2 O 5 to Saharan dust, ambient aerosols investigated using a novel and simple relative rate method with simultaneous detection of both NO 3 and N 2 O 5 . The use of cavity ring down spectroscopy to detect both trace gases enabled the measurements to be carried out at low mixing ratios ( 15. A value of γ (NO 3 ) /γ (N 2 O 5 ) ≈ 1.5–3 was obtained when using candle generated soot. The rel- 10 ative rate obtained for Saharan dust can be placed on an absolute basis using our recently determined value of γ (N 2 O 5 ) = 1 × 10 − 2 to give γ (NO 3 ) = 9 × 10 − 3 , which is significantly smaller than the single previous value. With the present uptake coe ffi cient, reaction of NO 3 with mineral dust will generally not contribute significantly to its NO 3 loss in the boundary atmosphere or to the nitration of mineral dust. 15