Hygrometer for Measurement of Relative Humidity in Clouds

PI希望设计一种精确的方法来测量 云的相对湿度，因为这个参数是必不可少的 云微观物理学的演变 该提案旨在发展 一种新的RH传感器能够满足这一需求。 传感器基于 在光学测量霾液滴，因为他们的大小响应 环境相对湿度的变化;相对湿度测量的准确度为+/- 预计为0.02%，还测量了100%的RH值。 一个原型传感器的现场使用将设计，设计， 并使用激光二极管技术的最新进展来制造。 将进行研究，使传感器的 在高风速大气条件下的生存能力， 大型水凝物 传感器的测试将在 过饱和条件下的大气云。 这项工作的目标是开发和测试相对湿度传感器， 在云上使用。 如果这项工作导致一个实际的原型，它是 预计商业版本将在 云研究社区。

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.