CEDAR: Mesospheric Investigation of Gravity Wave and Mountain Wave Activities and Impacts in the Lee Side of the Southern Andes

CEDAR：安第斯山脉南部背风面重力波和山波活动及其影响的中层调查

• 批准号: 1651233
• 负责人: P-Dominique Pautet
• 金额: $ 26.92万
• 依托单位: Utah State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-07-15 至 2021-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1651233&HistoricalAwards=false
• 关键词: CEDAR; Mesospheric; Investigation; Gravity; Wave

This award would support the deployment, installation, and operations of an Advanced Mesospheric Temperature Mapper (AMTM) at Rio Grande, Argentina (53.8 S, 67.7 W) for a three year period. This instrument would use OH emissions to determine the horizontal distribution of the neutral temperature at 85 km over an extent of 300 km square. This site already hosts a meteor wind radar and a Boston University all-sky airglow imager. A new Rayleigh lidar will also be deployed at this site in early 2017 by Dr. B. Kaifler from the German Aerospace Center (DLR). The AMTM operates automatically and with the meteor radar, the Rayleigh lidar, and all-sky imager a suite of 4 complementary data sets enabling unprecedented investigations of the characteristics, propagation and dissipation of atmospheric gravity waves would be created. The combined data sets from these instruments would provide a comprehensive set of accurate measurements of mesospheric winds, temperature, and density that would allow the determination of wave propagation direction and speed with high accuracy and cadence. The research site of Rio Grande is located in the southernmost part of South America. This region (South Andes, Drake Passage and Antarctic Peninsula) has been identified as an enormous gravity wave (GW) 'hotspot'. The mountainous terrain and persistent strong tropospheric winds generate a wealth of GWs including intense orographic waves. The research will help understand the GW lifecycle and effects on the middle and upper atmosphere. The propagation of GWs through the MLT region affects the transformation and exchange of mass, momentum, and energy at the altitudes of 80 to 110 km. Finally, the research will contribute substantially to undergraduate student education within the USA and will lead to new research opportunities for expanded international collaboration.The primary goals of this award are: 1.) To measure the occurrence and characteristics of MWs propagating into the MLT region in the lee side of the Southern Andes Mountains (one of the most intense source regions for MWs) using simultaneous complementary high-quality instruments (DLR Rayleigh lidar, SAAMER meteor radar and BU all-sky imager),2.) To estimate the impact of MWs on the upper atmosphere, via momentum deposition and compare with the forcing induced by non-orographic wave observed during the same period,3.) To compare the new results with previous observations involving similar instrumentations but with different orographic sources and atmospheric backgrounds: DEEPWAVE (New Zealand) and GW LCYCLE 2 (Scandinavia).

该合同将支持在阿根廷格兰德河（南纬53.8度，西经67.7度）部署、安装和运行先进中间层温度测绘仪（AMTM），为期三年。该仪器将利用OH排放量来确定85公里处300平方公里范围内中性温度的水平分布。 该网站已经拥有流星风雷达和波士顿大学全天气辉成像仪。B博士还将于2017年初在该站点部署一台新的瑞利激光雷达。来自德国航空航天中心（DLR）的Kaifler。AMTM自动运行，与流星雷达，瑞利激光雷达和全天空成像仪一起，将创建一套4个互补数据集，从而能够对大气重力波的特性，传播和消散进行前所未有的调查。这些仪器的综合数据集将提供一套全面的中间层风、温度和密度的精确测量数据，从而能够以高精度和节奏确定波的传播方向和速度。研究地点格兰德河位于南美洲最南端。该地区（南安第斯山脉、德雷克海峡和南极半岛）已被确定为一个巨大的重力波（GW）“热点”。山区地形和持续的强对流层风产生了丰富的GW，包括强烈的地形波。这项研究将有助于了解GW的生命周期以及对中高层大气的影响。全球Ws通过MLT区域的传播影响80至110 km高度处的质量、动量和能量的转换和交换。最后，该研究将为美国的本科生教育做出重大贡献，并将为扩大国际合作带来新的研究机会。该奖项的主要目标是：1.利用DLR Rayleigh激光雷达、SAAMER流星雷达和BU全天空成像仪，对南安第斯山脉背风面MLT区（MWs最强源区之一）传播的MWs的发生和特征进行同步测量。通过动量沉积估算MWs对高层大气的影响，并与同期非地形波引起的强迫进行比较。将新的结果与以前的观测结果进行比较，这些观测涉及类似的仪器，但具有不同的地形来源和大气背景：DEEPWAVE（新西兰）和GW LCYCLE 2（斯堪的纳维亚）。

项目成果

Mesospheric Mountain Wave Activity in the Lee of the Southern Andes

• DOI: 10.1029/2020jd033268
• 发表时间: 2020-06
• 期刊: Journal of Geophysical Research: Atmospheres
• 作者: P. Pautet;M. Taylor;D. Fritts;D. Janches;N. Kaifler;A. Dörnbrack;J. Hormaechea