In situ detection of aerosol layers in the middle stratosphere
In situ detection of aerosol layers in the middle stratosphere
复制标题
平流层中部气溶胶层的原位检测
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
C. Robert
中科院分区：
文献类型：
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作者：
J. Renard;G. Berthet;V. Salazar;V. Catoire;M. Tagger;B. Gaubicher;C. Robert
本文介绍了2008-2010年期间在赤道、北极夏季和北极春季3种不同地球物理条件下进行的气溶胶计数器STAC的14次新飞行。测量是在气球上升、漂浮高度和下降期间进行的。浮子高度在14至2百帕（29-42公里）之间，取决于飞行。在40 hPa以上的高度检测到气溶胶增强，在20 hPa以上的变率更强。其中两个可以归因于偶然发现的陨石碎片。在其他飞行中，探测到亚微米气溶胶的局部增强薄层。利用红外SPIRALE球囊谱仪对N2O示踪剂的同步原位测量，可以得出结论，这些增强的发生与气团起源的可变性没有直接联系。提出了一个涉及大气电场的过程来初步解释气溶胶的安全壳。
We present here 14 new flights of the aerosol counter STAC, performed in the 2008–2010 period under 3 different geophysical conditions: equator, summer Arctic, and spring Arctic. Measurements were conducted during the balloon ascent, at float altitude, and during the balloon descent. The float altitude was between 14 and 2 hPa (29–42 km), depending on the flights. Aerosol enhancements were detected for altitude levels above 40 hPa, with a stronger variability above 20 hPa. Two of them could be attributed to the fortuitous detection of meteoric debris. Thin layers of strong local enhancements of submicronic aerosols were detected during the other flights. Using simultaneous in situ measurements of the N2O tracers by the infra‐red SPIRALE balloon‐borne spectrometer, it can be concluded that the occurrence of these enhancements is not directly linked to the variability of air mass origins. A process involving atmospheric electric field is proposed to tentatively explain the aerosol containment.