Collaborative Research: CEDAR--The Sources of Gravity Waves Observed in the Thermosphere at the Arecibo Observatory

合作研究：CEDAR——阿雷西博天文台在热层中观测到的重力波来源

• 批准号: 1139149
• 负责人: Sharon Vadas
• 金额: $ 19.68万
• 依托单位: NorthWest Research Associates, Incorporated
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-03-01 至 2015-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1139149&HistoricalAwards=false
• 关键词: Collaborative; Research; CEDAR; Sources; Gravity

This is a 3-year observation and modeling project to be undertaken as part of the Coupling, Energetics and Dynamics of Atmospheric Regions (CEDAR) program. Atmospheric gravity waves are believed to play a vital role in the transport of energy and momentum between atmospheric layers. This project concerns the ubiquitous wave field in the thermosphere at the low latitude Arecibo Observatory (AO) site. Observing campaigns with the Arecibo incoherent scatter radar that employ a newly developed and tested innovative measurement technique will be used together with ray tracing, and first principles models. The goal is to self-consistently determine all of the parameters needed for reverse ray tracing for the gravity waves observed at the AO, to identify the most likely lower atmospheric and thermospheric sources for dozens of these gravity wave events, to determine the temporal evolution of the F region neutral wind, and to determine the neutral wind acceleration caused by select sources. Gravity waves are a significant forcing source on mesosphere and lower thermosphere dynamics and their effects strongly impact general circulation and climate models. In addition, numerical weather prediction models, despite their tropospheric focus, have been shown to make better predictions when the upper-atmospheric dynamics are more accurately modeled. The project is collaboration between a female PI at North West Research Associates and an early career scientist at SRI International and also involves scientists at the NSF AO facility.

这是一个为期3年的观察和建模项目，作为大气区域（CEDAR）计划的耦合，能量和动态的一部分进行的一部分。据信大气重力波在大气层之间的能量和动量运输中起着至关重要的作用。该项目涉及低纬度天文台（AO）位点热层中普遍存在的波场。使用Arecibo Incrahent散点雷达观察运动，该运动采用新开发和测试的创新测量技术将与射线追踪和第一原理模型一起使用。目的是自我一致地确定在AO处观察到的重力波的反向射线追踪所需的所有参数，以确定这些重力波事件的最可能的大气和热圈源，以确定F区域中性风的时间演化，并确定所选源引起的中性风进气。重力波是中层和较低热层动力学的重要强迫源及其影响强烈影响一般循环和气候模型。此外，尽管有数值的天气预测模型，尽管它们具有对流层的焦点，但在更精确的模型时，已证明可以更好地预测。该项目是西北研究协会的女性PI与SRI International的早期职业科学家之间的合作，还涉及NSF AO设施的科学家。