Nitric acid in cirrus clouds

Nitric acid in cirrus clouds
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卷云中的硝酸

DOI:
10.1029/2005gl025159
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发表时间:
2006
影响因子:
5.2
通讯作者:
Y. Kondo
Y. Kondo
中科院分区:
地球科学1区
文献类型:
--
作者:
C. Voigt;H. Schlager;H. Ziereis;B. Kärcher;B. Luo;C. Schiller;M. Krämer;P. Popp;H. Irie;Y. Kondo

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2003 年 2 月 11 日,M55 地球物理飞机上的现场仪器观测到北极卷云冰晶中硝酸 (HNO3) 的吸收。平均冰水含量为5.4 mg m−3的卷云覆盖了斯堪的纳维亚半岛北部数小时,并延伸至12.3公里处的热对流层顶。在卷云区域内,以活性氮 (NOy) 形式测量的总 HNO3 平均有 9% 存在于冰粒中,在温度低于 205 K 时增加到 19%。与之前的研究相反,我们根据冰晶中的 HNO3/H2O 摩尔比来讨论冰中 HNO3 的吸收。冰中的硝酸含量随着气相硝酸浓度的增加和温度的降低而增加。冰中 HNO3 的增强吸收以及冷卷云上的异质化学可能会扰乱对流层上层臭氧预算。
Uptake of nitric acid (HNO3) in Arctic cirrus ice crystals was observed on 11 February 2003 by in‐situ instruments onboard the M55 Geophysica aircraft. The cirrus cloud with a mean ice water content of 5.4 mg m−3 covered northern Scandinavia for several hours and extended up to the thermal tropopause at 12.3 km. Within the cirrus region, on average 9% of the total HNO3 measured as reactive nitrogen (NOy) is present in ice particles, increasing to 19% at temperatures below 205 K. In contrast to previous studies, we discuss the HNO3 uptake in ice in terms of HNO3/H2O molar ratios in ice crystals. The HNO3 content of the ice increases with increasing gas phase HNO3 concentrations and decreasing temperatures. Enhanced uptake of HNO3 in ice and heterogeneous chemistry on cold cirrus clouds may disturb the upper tropospheric ozone budget.