Hygrometer for Measurement of Relative Humidity in Clouds

PI希望设计一种精确的方法来测量云中的相对湿度，因为这个参数在云微物理的演变中是必不可少的。本建议旨在开发一种能够满足这一需求的新型RH传感器。该传感器基于对雾滴的光学测量，因为雾滴的大小对环境相对湿度的变化做出反应；相对湿度测量的精度预计为+/-0.02%，同时还可以测量相对湿度100%。将利用激光二极管技术的最新进展来设计、设计和制造用于现场的原型传感器。将进行研究，使传感器在高风速和大水流星的大气条件下的生存能力成为可能。传感器的测试将在过饱和条件下的大气云中进行。这项工作的目标是开发和测试一种用于云内使用的RH传感器。如果这项工作导致了一个实际的原型，预计商业版本将在云研究社区找到重要的用途。

The PI wishes to devise an accurate means for measuring relative humidity in clouds, because this parameter is essential in the evolution of cloud microphysics. This proposal is to develop a new RH sensor capable of meeting this need. The sensor is based on the optical measurement of haze droplets as they respond in size to changes in ambient RH; an accuracy of the RH measurement of +/- 0.02% is anticipated, with RH values 100% also being measured. A prototype sensor for field use will be devised, designed, and fabricated using recent advances in laser diode technology. Research will be conducted to make possible the sensor's survivability under atmospheric conditions with high wind speed and large hydrometeors. Tests of the sensor will be conducted in atmospheric clouds under supersaturated conditions. The goal of this work is to develop and test a RH sensor for incloud use. If this work leads to a practical prototype, it is anticipated that a commercial version would find significant use in the cloud research community.