A light balloon-borne sampler collecting stratospheric aerosol particles for electron microscopy
A light balloon-borne sampler collecting stratospheric aerosol particles for electron microscopy
复制标题
轻型气球载采样器收集平流层气溶胶颗粒用于电子显微镜
DOI：
10.2151/jmsj1965.75.3_753
复制
发表时间：
1997
影响因子：
3.1
通讯作者：
Mitsugu Hotta
中科院分区：
文献类型：
--
作者：
K. Okada;Pei;Toyoaki Tanaka;Mitsugu Hotta
研制了一种轻型气球载气溶胶采样器，用于采集单个平流层气溶胶颗粒，以便用电子显微镜分析其组成。该采样器重917克，由两级冲击器、泵和控制单元组成。采样器可以用一个3公斤重的橡胶气球轻松抬起，并通过预测准确的落点在农村地区回收。在每次采集过程中，这种取样器可以固定在冲击器射流下方的电子显微镜栅格的位置。在一次观测中，每个冲击器阶段可以采集16个样本。该采样器于1994年8月在日本筑波上空采集了从地面到平流层下部的气溶胶样品。对平流层粒子的观测结果表明，在半径为0.03~1μm的粒子中，硫酸粒子占主导地位。与以往观测中使用的单级撞击器相比，使用两级撞击器可以减少硫酸粒子在收集表面形成的卫星滴环的重叠，从而掩盖了较小的粒子。该取样器采集的样品有助于用电子显微镜检查大尺寸范围内的单个颗粒的组成。
A light balloon-borne aerosol sampler was developed to collect individual stratospheric aerosol particles in order to analyze the composition by electron microscopy. The sampler, which is 917 g in weight, consists of a two-stage impactor, a pump and a control unit. The sampler can be easily lifted using a rubber balloon of 3 kg in weight and be recovered in rural areas by predicting the accurate falling points. This sampler can fix the position of an electron microscopic grid just below the impactor jet during each collection. During an observation, 16 samples in each impactor stage can be collected. Aerosol samples from the ground to the lower stratosphere were obtained by using this sampler in August 1994 over Tsukuba, Japan. Results on the observation of stratospheric particles showed that sulfuric acid particles were dominant in particles of radius between 0.03 and 1 μm. As compared with a single-stage impactor used in our previous observations, the use of the two-stage impactor could reduce the overlap of the satellite droplet rings formed by sulfuric acid particles on the collecting surface which masked smaller particles. The samples collected by this sampler are useful to examine the composition of individual particles in a wide size range by electron microscopy.