Balloon observations of nitric acid aerosol formation in the Arctic stratosphere: II. Aerosol
Balloon observations of nitric acid aerosol formation in the Arctic stratosphere: II. Aerosol
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北极平流层硝酸气溶胶形成的气球观测：II。
DOI：
10.1029/gl017i009p01279
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发表时间：
1990
期刊：
影响因子：
--
通讯作者：
H. Schlager
中科院分区：
文献类型：
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作者：
D. Hofmann;T. Deshler;F. Arnold;H. Schlager
1990 年 1 月 31 日对尺寸范围 r = 0.01 至 10 μm 的气球载气溶胶测量结果用于确定 21-24 公里区域北极三水硝酸 (NAT) 云中沉积的 HNO3 蒸气质量。云主要由小颗粒（r≈0.2μm）组成，似乎是在最近的冷却过程中形成的，因为云最冷部分的r≥0.15μm气溶胶浓度几乎等于凝结核浓度，表明存在很大的水蒸气过饱和度。推断云中凝结的最大 HNO3 蒸气混合比约为 4 ppbv，与 23 小时前在相同高度区域、相似温度条件下观察到的 HNO3 蒸气消耗情况非常吻合。
Balloonborne aerosol measurements over the size range r = 0.01 to 10 μm on 31 January 1990 are used to determine the HNO3 vapor mass deposited in Arctic nitric acid trihydrate (NAT) clouds in the 21–24 km region. The clouds consisted mainly of small (r≈ 0.2 μm) particles and appeared to have been formed during recent cooling because the r ≥ 0.15 μm aerosol concentration in the coldest part of the cloud was nearly equal to the condensation nuclei concentration, suggesting a large vapor supersaturation. The maximum inferred HNO3 vapor mixing ratio which condensed in the cloud was about 4 ppbv, in good agreement with the observed depletion of HNO3 vapor in the same altitude region under similar temperature conditions 23 hours earlier.