Environmental Conditions and Characteristics of Ice Supersaturated Regions in Deep Convective Clouds and Chemistry (DC3)

在这个项目中，最先进的垂直腔面发射激光(VCSEL)湿度计，通过早期的NSF支持开发，将被部署在NSF/NCAR湾流V(GV)研究飞机上，以在深对流云和化学(DC3)现场活动期间对水蒸气进行高精度和精确的测量。由于其水平和垂直范围大，GV飞机可以有效地对温带对流层上层和平流层下层进行采样。DC3的野外活动将包括在深对流、砧状卷云和非对流卷云等环境中进行广泛的采样。此外，还将对包括清洁和污染源地区在内的各种化学和微物理环境进行采样。VCSEL湿度计将提供亚云尺度的水蒸气的快速测量。这将允许以前所未有的细节水平研究卷云内部和外部的冰过饱和。还将在天气尺度的云层上探索冰过饱和地区周围的环境条件。此外，该项目将继续努力改进代表对流层上层和平流层下层条件的水蒸气校准方法。广泛影响：该项目将提供让高中生参与的机会，以吸引他们投身科学和工程职业。这将与非营利性青年科学成就计划(YSAP)合作完成，YSAP是一个组织，为新泽西州/纽约市代表不足的学生和教师群体为期一年的科学项目提供资金，并将每个小组与一名专业导师配对。研究人员、研究生和博士后研究人员将担任导师，参加普林斯顿大学一年一度的“科学日”活动，参观实验室，并为教师准备教学材料。

In this project, the state-of-the art Vertical Cavity Surface Emitting Laser (VCSEL) hygrometer, developed through earlier NSF support, will be deployed aboard the NSF/NCAR Gulfstream V (GV) research aircraft to make highly accurate and precise measurements of water vapor during the Deep Convective Clouds and Chemistry (DC3) field campaign. Due to its large horizontal and vertical range, the GV aircraft can efficiently sample the extratropical upper troposphere and lower stratosphere. The DC3 field campaign will include extensive sampling in environments such deep convection, anvil cirrus, and non-convective cirrus. In addition, a wide variety of chemical and microphysical environments will be sampled including clean and polluted source regions. The VCSEL hygrometer will provide fast measurements of water vapor at sub-cloud scales. This will allow for studies of ice supersaturation both inside and outside of cirrus clouds at unprecedented levels of detail. The environmental conditions surrounding ice supersaturated regions will also be explored on a cloud to synoptic scale. Additionally, this project will include continued efforts to improve methods of water vapor calibrations at conditions representative of the upper troposphere and lower stratosphere.Broader Impacts: This project will provide opportunities to involve high school students in order to attract them into science and engineering careers. This will be done in partnership with the non-profit Young Science Achievers Program (YSAP), an organization that funds year-long science projects from underrepresented student-teacher groups in NJ/NYC and pairs each group with a professional mentor. The investigator, graduate students and postdoctoral researchers will act as mentors and participate in an annual "Science Day" at Princeton University, laboratory tours, and the preparation of instructional material for teachers.