Airborne stratospheric ITCIMS measurements of SO2, HCl, and HNO3 in the aged plume of volcano Kasatochi
Airborne stratospheric ITCIMS measurements of SO2, HCl, and HNO3 in the aged plume of volcano Kasatochi
复制标题
笠内火山老化羽流中 SO2、HCl 和 HNO3 的机载平流层 ITCIMS 测量
DOI：
10.1029/2010jd013890
复制
发表时间：
2010
影响因子：
--
通讯作者：
A. Dörnbrack
中科院分区：
文献类型：
--
作者：
T. Jurkat;C. Voigt;F. Arnold;H. Schlager;H. Aufmhoff;J. Schmale;J. Schneider;M. Lichtenstern;A. Dörnbrack
[1]大规模火山爆发会将气体和火山灰颗粒注入平流层，对臭氧和气候造成重大影响。在这里，我们报告的快速和灵敏的原位测量二氧化硫（SO2），盐酸（HCl），硝酸（HNO 3）在一个古老的平流层羽状火山起源的离子阱化学电离质谱仪（ITCIMS）船上的研究飞机猎鹰。猎鹰上的其他仪器测量了活性氮（NOy），一氧化碳（CO）和臭氧（O3）以及气溶胶成分。该羽流很可能源自2008年8月7日至8日阿留申火山Kasatochi的喷发，近3个月后，即2008年10月31日，飞机在欧洲上空执行两次任务时在7000米至11，600米的高度遇到了该羽流。在烟羽中，SO2混合比高达0.51 ppbv，比背景平流层（0.02-0.055 ppbv）高出约10倍。HCl/O3和HNO 3/NOy的摩尔比趋于升高高达19%，HNO 3/O3也表现出显着增强内羽。从我们的测量，我们推断的上限的e-折叠寿命为62天的SO2转换在平流层中，这表明约25%的火山SO2尚未经历OH诱导转化为硫酸。我们的测量有助于更好地了解火山气溶胶的形成和这些粒子在平流层下部发生的非均相反应。
[1] Major explosive volcanic eruptions inject gases and ash particles into the stratosphere, resulting in significant impacts on ozone and climate. Here we report on fast and sensitive in situ measurements of sulfur dioxide (SO2), hydrochloric acid (HCl), and nitric acid (HNO3) in an aged stratospheric plume of volcanic origin made by an ion trap chemical ionization mass spectrometer (ITCIMS) aboard the research aircraft Falcon. Other instruments on the Falcon measured reactive nitrogen (NOy), carbon monoxide (CO), and ozone (O3) as well as the aerosol composition. The plume most likely originated from the 7–8 August 2008 eruption of the Aleutian volcano Kasatochi and almost 3 months later, on 31 October 2008, was encountered by the aircraft during two missions over Europe at altitudes between 7000 and 11,600 m. Within the plume, SO2 mixing ratios of up to 0.51 ppbv were about a factor of 10 higher than in the background stratosphere (0.02–0.055 ppbv). The molar ratios HCl/O3 and HNO3/NOy tended to be elevated by up to 19%, and HNO3/O3 also showed a substantial enhancement inside the plume. From our measurements we infer an upper limit of the e-folding lifetime of 62 days for SO2 conversion in the stratosphere, indicating that approximately 25% of the volcanic SO2 had not yet experienced OH-induced conversion to sulfuric acid. Our measurements contribute to a better understanding of the formation of volcanic aerosol and of heterogeneous reactions taking place on these particles in the lower stratosphere.
年轻尾迹的现场观测——音乐会活动的概述和选定结果
影响因子：
6.3
作者：
U. Schumann;T. Jurkat;D. Schäuble;H. Schlager;A. Petzold;J.- F. Gayet;M. Krämer;J. Schneider;S. Borrmann;J. Schmale;P. Jessberger;T. Hamburger;M. Lichtenstern;M. Scheibe;C. Gourbeyre;J. Meyer;M. Kübbeler;W. Frey;H. Kalesse
通讯作者：
H. Kalesse
影响因子：
6.3
作者：
V. Fiedler;F. Arnold;S. Ludmann;A. Minikin;L. Pirjola;A. Dörnbrack;H. Schlager
通讯作者：
V. Fiedler;F. Arnold;S. Ludmann;A. Minikin;L. Pirjola;A. Dörnbrack;H. Schlager