Verification of large‐scale rapid transport in the lower thermosphere: Tracking the exhaust plume of STS‐107 from launch to the Antarctic
Verification of large‐scale rapid transport in the lower thermosphere: Tracking the exhaust plume of STS‐107 from launch to the Antarctic
复制标题
验证低热层大规模快速运输：跟踪 STS-107 从发射到南极的排气羽流
DOI：
10.1029/2010ja016277
复制
发表时间：
2011
影响因子：
--
通讯作者：
Qian Wu
中科院分区：
文献类型：
--
作者：
R. Niciejewski;W. Skinner;M. Cooper;A. Marshall;R. Meier;M. Stevens;D. Ortland;Qian Wu
[1] 对 TIMED 多普勒干涉仪 (TIDI) 和高分辨率多普勒成像仪 (HRDI) 记录的 O2 气辉光谱多普勒频移的新分析提供了确凿的证据，证明 STS-107 发射时在低热层产生并由 TIMED 上的全球紫外线成像仪 (GUVI) 仪器成像的航天飞机主发动机废气羽流被运送到南极洲 ∼80 小时，支持史蒂文斯等人最初研究的关键推论。 （2005）。这些新结果得益于对仪器和卫星伪影对多普勒频谱的影响的进一步了解。 STS-107 于 2003 年 1 月 16 日发射，TIDI 在几分钟内就采样到了其发射轨迹附近的中性风和附近的体积。这些初步观察结果表明，航天飞机废气羽流的最北端将向东北方向移动，而南端将向东南方向移动，这些运动在 TIMED 的下一个轨道期间获取的图像中被识别出来。根据发射后 12、26 和 50 小时获得的 GUVI 图像推断出的羽流运动方向和幅度再次得到 TIDI 和 HRDI 的证实。发射后约 80 小时，南极上空羽流的出现（从早期工作中通过航天飞机主发动机烧蚀的铁的出现推断出来）与卫星多普勒仪器测量的南极上空中性风一致。 2003 年 1 月 18 日，南半球三号波的 2 天行星波的有利位相和强振幅帮助羽流从佛罗里达海岸输送到南极洲。2 天波的存在是根据纬向平均以及 TIDI 和 HRDI 中性风观测的组合推断出来的。我们的结论是，MLT 中存在强而持续的风，明显大于经验和理论模型的预期，这是无可争议的，并提供了令人信服的证据，支持 Larsen (2002) 在 40 年的探空火箭化学释放实验中观察到的强度大于 100 m/s 的热层风的全球范围性质。
[1] New analysis of the Doppler shift of O2 airglow spectra recorded by the TIMED Doppler Interferometer (TIDI) and the High Resolution Doppler Imager (HRDI) have provided conclusive evidence that the shuttle main engine exhaust plume generated in the lower thermosphere by the launch of STS-107 and imaged by the Global Ultraviolet Imager (GUVI) instrument on TIMED was transported to the Antarctic in ∼80 h, supporting a key inference from the initial study by Stevens et al. (2005). These new results were aided by improved knowledge of the effects of instrumental and satellite artifacts imposed on the Doppler spectra. STS-107 launched on 16 January 2003, and the neutral wind near its launch trajectory and nearby volume was sampled within minutes by TIDI. These initial observations suggested that the northernmost end of the shuttle's exhaust plume would move northeast and that the southern end would move southeast, motions that were identified in imagery acquired during the next orbit of TIMED. The direction and magnitude of plume motion inferred from GUVI images obtained 12, 26, and 50 h after launch were again confirmed by TIDI and HRDI. The appearance of the plume over the Antarctic ∼80 h after launch, inferred from earlier work by the appearance of iron ablated from the shuttle's main engines, was consistent with neutral winds measured by the satellite Doppler instruments over the Antarctic. The transport of the plume from the coast of Florida to the Antarctic was aided by the favorable phase and strong amplitude of a 2 day planetary wave of wave number three in the southern hemisphere on 18 January 2003. The existence of the 2 day wave was deduced from zonally averaged and combined TIDI and HRDI neutral wind observations. We conclude that the existence of strong and sustained winds in the MLT, significantly greater than expected from empirical and theoretical models, is indisputable and provides compelling evidence supporting the global-scale nature of thermospheric winds with magnitude greater than 100 m/s observed by Larsen (2002) from 40 years of sounding rocket chemical release experiments.
影响因子：
6.3
作者：
Tunbridge V
通讯作者：
Tunbridge V