Observed particle evolution in the polar stratospheric cloud of January 24, 1989
Observed particle evolution in the polar stratospheric cloud of January 24, 1989
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1989 年 1 月 24 日观测到的极地平流层云中的粒子演化
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
J. Wilson
中科院分区：
文献类型：
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作者：
J. Dye;B. Gandrud;D. Baumgardner;K. R. Chan;G. Ferry;M. Loewenstein;K. Kelly;J. Wilson
1989年1月24日，NASA ER-2用新型前向散射光谱仪探测器（FSSP）300在I型极地平流层云（PSC）中测量的颗粒尺寸分布显示出直径接近0.8 μ m的体积模型。云入口后的颗粒浓度和体积的大幅度增加没有发生，直到硝酸相对于硝酸三水合物的表观饱和比达到10，但在1附近的尺寸分布的细微变化的比率表明，一些I型颗粒存在。云层中15至17 cm {sup {minus} 3}的颗粒浓度大于云层外5至7 cm {sup {minus} 3}的氯化萘浓度，表明成核作用不仅仅是硫酸盐颗粒。在冰饱和的区域观察到一些直径大于4 μ m的颗粒。
Particle size distributions measured from the NASA ER-2 with the new Forward Scattering Spectrometer Probe (FSSP) 300 in a type I polar stratospheric cloud (PSC) on January 24, 1989 show a volume model near 0.8 {mu}m diameter. The large increase in particle concentration and volume after cloud entry did not occur until the apparent saturation ratio of nitric acid with respect to nitric acid trihydrate reached 10, but at ratios near 1 subtle changes in the size distribution suggest some type I particles were present. Particle concentrations in cloud of 15 to 17 cm{sup {minus}3} were greater than the CN concentrations of 5 to 7 cm{sup {minus}3} just outside of cloud, suggesting nucleation on more than just sulfate particles. Some particles > 4 {mu}m diameter were observed in a region which was saturated with respect to ice.