Fine-scale Description of Shallow Atmospheric Boundaries during International Water Vapor Project (IHOP)

国际水汽(H2O)项目(IHOP)是一个大型的多机构、多调查者项目，其重点是测量水蒸气和水蒸气的可变性。该项目的目标是增进对对流引发的了解，并提高短期降水预报技能。研究人员将利用怀俄明州云雷达系统(WCR)、来自怀俄明大学国王航空研究飞机(UWYKA)的现场数据以及辅助的IHOP数据，以前所未有的详细程度描述雷达“细线”的垂直结构和演变，如流出边界和干线，并解释它们触发深对流的能力。UWYKA配备了一系列大气传感器来测量温度、湿度、风及其通量，以及云和辐射探测器。UWYKA和WCR数据沿阶梯导线的组合将允许(A)描述浅层辐合区的运动学和热力学垂直结构；以及(B)估计边界层可降水量、对流参数和细线上的水汽辐合的变化。需要检验的关键假设是：1.WCR数据足够敏感和详细，可以描述边界层结构的各种细节。WCR数据可以详细和准确地描述雷达探测到的细线上垂直截面上的气流3。对WCR、UWYKA和辅助的IHOP资料，特别是DIAL水汽廓线的分析将显示，在‘混合良好’的对流边界层中，可降水量的变化是显著的。

The International Water Vapor (H2O) Project (IHOP) is a large multi-agency, multi-investigator project that focuses on the measurement of water vapor and water vapor variability. The goal of the project is to improve understanding of convective initiation and to increase short-term precipitation forecast skills. The researcher will employ the Wyoming Cloud Radar system (WCR), in situ data from the University of Wyoming King Air research aircraft (UWYKA), and ancillary IHOP data to describe in unprecedented detail, the vertical structure and evolution of radar "fine-lines", such as outflow boundaries and drylines, and to interpret their ability to trigger deep convection. The UWYKA is equipped with an array of atmospheric sensors to measure temperature, humidity, winds, and their fluxes, as well as cloud and radiation probes. The combination of UWYKA and WCR data along stepped traverses will allow (a) a description of the kinematic and thermodynamic vertical structure of shallow convergence zones; and (b) an estimation of the variation of the boundary layer precipitable water, convection parameters, and moisture convergence across fine-lines.The key hypotheses to be tested are:1. The WCR data are sufficiently sensitive and detailed to describe various details of boundary layer structures2. The WCR data allow a detailed and accurate description of the airflow in vertical sections across radar-detected fine-lines3. Analysis of combined WCR, UWYKA, and ancillary IHOP data, in particular DIAL water vapor profiles will show that the variability of precipitable water in a 'well-mixed' convective boundary layer is significant.