Stratospheric gravity wave fluxes and scales during DEEPWAVE
Stratospheric gravity wave fluxes and scales during DEEPWAVE
复制标题
DEEPWAVE 期间的平流层重力波通量和尺度
DOI：
10.1175/jas-d-15-0324.1
复制
发表时间：
2016
影响因子：
3.1
通讯作者：
S. Beaton
中科院分区：
文献类型：
--
作者：
Ronald B. Smith;A. Nugent;C. Kruse;D. Fritts;J. Doyle;S. Eckermann;M. Taylor;A. Dörnbrack;M. Uddstrom;W. Cooper;P. Romashkin;J. Jensen;S. Beaton
摘要在2014年6月和7月的深对流重力波实验（DEEPWAVE）项目期间，湾流V研究飞机在新西兰南阿尔卑斯山上空飞行了97段，在塔斯曼海和南大洋上空飞行了150段，主要是在12.1公里高度的低平流层。改进的仪器校准，冗余传感器，更长的飞行腿，能量通量估计和尺度分析揭示了几个新的重力波特性。在海面上，飞行层波通量大多低于检测阈值。在地形上，扰动具有正的垂直能量通量（EFz），负的纬向动量通量和逆风水平能量通量的特征山波属性。在某些情况下，通量在8小时飞行内迅速变化，即使环境条件几乎没有变化。观测到的最大纬向动量通量和垂直能量通量分别为MFx = −550 mPa和EFz = 22 W m−2。
AbstractDuring the Deep Propagating Gravity Wave Experiment (DEEPWAVE) project in June and July 2014, the Gulfstream V research aircraft flew 97 legs over the Southern Alps of New Zealand and 150 legs over the Tasman Sea and Southern Ocean, mostly in the low stratosphere at 12.1-km altitude. Improved instrument calibration, redundant sensors, longer flight legs, energy flux estimation, and scale analysis revealed several new gravity wave properties. Over the sea, flight-level wave fluxes mostly fell below the detection threshold. Over terrain, disturbances had characteristic mountain wave attributes of positive vertical energy flux (EFz), negative zonal momentum flux, and upwind horizontal energy flux. In some cases, the fluxes changed rapidly within an 8-h flight, even though environmental conditions were nearly unchanged. The largest observed zonal momentum and vertical energy fluxes were MFx = −550 mPa and EFz = 22 W m−2, respectively.A wide variety of disturbance scales were found at flight level over...