The observation method of lower tropospheric aerosols using drop-aerosol-sondes : an application of a big size crewless airplane for measurements of environment

1997年和1998年进行了落点探空光学粒子计数器的研究。行星上层边界层和对流层中层大气颗粒的大小数浓度是研究大气硫酸盐全球地球化学循环的必要条件。然而，由于测量困难，观测很少。将光学粒子计数器液滴式探空仪样机安装在用于南极机载测量计划（AARMS）的飞机上，并对该计数器作为液滴式探空仪的有效性和可行性进行了测试。测试结果表明。粒子计数器的重量为4公斤，足够低，可以制造dropsonde2。计数器工作在常压条件下，温度范围为2O C-65 C，压力范围为100ohpa - 25hpa3。在超微米级颗粒范围内检测到因进水管过长造成的颗粒损失。但由于探空式光学粒子计数器的入口长度极短，因此问题并不严重。

The research project was made to investigate drop-sonde mounted optical particle counter in 1997 and 1998. The size-number concentration of atmospheric particles in the upper planetary boundary layer and mid troposphere is essential for studies global geochemical cycles of atmospheric sulfate. However there are few observations due to difficulty of measurements. Prototype of the drop-sonde of optical particle counter was mounted on the airicraft which was used to campaighn of AARMS (Antarctic Airborne Measurment Program), and tested for abalability and feasibility of the counter as dropsonde.The test suggested1. weight of particle counter is 4kg. and enough low to make dropsonde2. counter works under the atmospheric condition temperature range of 2OﾟC-65ﾟC and pressure range of 1OOOhPa-25hPa3. loss of particles due to long inlet pipe was detected in the super micron range particle. but it is not serious problems because drpsonde type optical particle counter will have extremely short length inlet.