Continuation of Aircraft Studies of Horizontal Pressure Gradients and Ageostrophic Accelerations

飞机水平压力梯度和地转加速度研究的继续

• 批准号: 8912555
• 负责人: Thomas Parish
• 金额: $ 11.69万
• 依托单位: University of Wyoming
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-02-01 至 1993-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8912555&HistoricalAwards=false
• 关键词: Continuation; Aircraft; Studies; Horizontal; Pressure

Horizontal gradients of atmospheric pressure are the fundamental cause of almost all motions in the atmosphere. Very precise measurements of small pressure differences over distances of tens of kilometers are important for understanding of forcing functions responsible for extreme weather events. In general, present day operational instrumentation are not capable of measuring pressure gradients with sufficient accuracy for some research purposes. In previous research, the Principal Investigators demonstrated that high resolution airborne radar altimeters coupled with highly accurate navigational positioning, allow extremely accurate calculations of pressure gradient forces. These measurements are considered important to attack some classes of meteorological problems over the next decade. The Principal Investigators will continue to develop their measurement technique using data collected from their earlier experiment. The technique will then be applied to discern important physical processes associated with upper tropospheric jets, which have been shown to be associated with severe weather.//

大气压力的水平梯度是大气中几乎所有运动的根本原因。非常精确地测量几十公里距离上的微小压力差，对于理解造成极端天气事件的强迫函数非常重要。一般来说，目前的操作仪器不能以足够的精度测量压力梯度，用于某些研究目的。在之前的研究中，首席研究人员证明了高分辨率机载雷达高度计与高精度导航定位相结合，可以非常精确地计算压力梯度力。这些测量被认为对未来十年解决某些类型的气象问题很重要。主要研究人员将继续利用从早期实验中收集的数据发展他们的测量技术。这项技术随后将被用于辨别与对流层上层喷流有关的重要物理过程，这些喷流已被证明与恶劣天气有关。//