Collaborative Reasearch: CEDAR--Gravity Wave Momentum Fluxes and Instability Studies Using Coupled Lidar, Temperature Mapper and Modeling Studies at ALOMAR and Cerra Pachon

合作研究：CEDAR——在 ALOMAR 和 Cerra Pachon 使用耦合激光雷达、温度测绘仪和建模研究进行重力波动量通量和不稳定性研究

• 批准号: 1259136
• 负责人: David Fritts
• 金额: $ 11.78万
• 依托单位: GLOBAL ATMOSPHERIC TECHNOLOGIES AND SCIENCES, INC.
• 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: 2012-07-15 至 2014-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1259136&HistoricalAwards=false
• 关键词: Collaborative; Reasearch; CEDAR; Gravity; Wave

The investigators will conduct comprehensive experimental studies aimed at quantifying gravity wave (GW) momentum transport and the GW instability dynamics that drive energy and momentum deposition and energy transfers in the mesosphere and lower thermosphere (MLT). GWs having small horizontal scales and large amplitudes and momentum fluxes provide the majority of the mean and variable forcing in the MLT, and these vary significantly in space and time. Understanding of this forcing and variability is highly uncertain, but it is extremely important for parameterization of such dynamics in large-scale modeling of the MLT, and throughout the atmosphere. The same parameterization needs are also critical for general circulation models (GCMs), climate models, and numerical weather prediction (NWP) models in related fields. To quantify these GW and instability dynamics and their mean and variable forcing as fully as possible, the investigators will employ instrument suites at the only two sites able to define these dynamics in the most complete and quantitative manner. Low-latitude measurements will use the comprehensive instrumentation of the new Cerro Pachon Observatory in Chile (30°S); high-latitude measurements will employ the even more extensive suite of instrumentation at the ALOMAR observatory in northern Norway (69°N).These instrument suites permit the most complete, and redundant, specification of the GW, instability, and mean parameters needed to quantify GW amplitudes, momentum fluxes, and instability dynamics at any site. The recognized role of GWs in driving the mean and variable structure of the MLT makes an understanding of their various contributions, and an ability to model their effects, a high priority. These dynamics also influence a wide range of other processes ranging from tidal and planetary wave structures and dynamics to minor species transport. The need to describe such effects accurately also has broader implications for modeling climate change, responses to variable solar forcing, and Space Weather.

研究人员将旨在量化重力波（GW）YNAMIGS（GW）YNAMICS，这些沉积物和能量转移在中季节和热摩sphree（MLT）中。是在MLT的大规模建模中的参数化，尽管大气也是相同的参数化需求。 iSTAVISE动态和均值和变量尽可能完全，研究人员将在只有两个能够定义最多的仪器的位置。 （30°S）;高纬度测量将在北部的Alomar天文台上更广泛的仪器（69°N）。 MLT的结构可以理解各种贡献，并具有建模其效果的能力，这些动态还会影响从潮汐和行星波结构和动力学到次要物种的广泛范围。这种效果还具有建模气候变化的广泛性。