Large-Scale Traveling Atmospheric and Ionospheric Disturbances Observed in GUVI With Multi-Instrument Validations.
Large-Scale Traveling Atmospheric and Ionospheric Disturbances Observed in GUVI With Multi-Instrument Validations.
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DOI：
10.1029/2022gl099901
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发表时间：
2022-08-28
影响因子：
5.2
通讯作者：
Conde, Mark
中科院分区：
文献类型：
--
作者：
Bossert, Katrina;Paxton, Larry J.;Matsuo, Tomoko;Goncharenko, Larisa;Kumari, Komal;Conde, Mark
本研究介绍了在极地冬季半球适度增加的极光电射流活动和平流层突然变暖期间观察到的持续大规模旅行电离层/大气扰动（LSTIDS/LSTAD）的多仪器观测。全球紫外线成像仪（GUVI），重力场和稳态海洋环流探测器，扫描多普勒成像法布里-珀罗干涉仪和扑克牌平板非相干散射雷达被用来证明2013年1月18日至19日在阿拉斯加地区到低中纬度地区的19 UT和5 UT之间存在LSTIDS/LSTAD。这项研究展示了第一次使用GUVI研究LSTAD。这些新的GUVI观测表明，GUVI远紫外辐射有可能用于全球范围的热层波动和大气扰动研究，这是一个缺乏长期全球测量的地区。这些观测结果代表了从140到180公里的辐射变化，为热层的行为打开了一扇新的窗口。全球紫外线成像仪首次对远紫外辐射中的大规模移动电离层扰动（LSTIDS）进行了观测，并验证了持续的LSTID/大规模移动大气扰动（LSTAD）在几个小时内被观测到，与中等地磁扰动和重大的平流层突然变暖（SSW）相一致。大气扰动的沿着轨道水平波长为2000 -2，500公里，周期为102 -2.5小时
This study presents multi‐instrument observations of persistent large‐scale traveling ionosphere/atmospheric disturbances (LSTIDs/LSTADs) observed during moderately increased auroral electrojet activity and a sudden stratospheric warming in the polar winter hemisphere. The Global Ultraviolet Imager (GUVI), Gravity field and steady‐state Ocean Circulation Explorer, Scanning Doppler Imaging Fabry–Perot Interferometers, and the Poker Flat Incoherent Scatter Radar are used to demonstrate the presence of LSTIDs/LSTADs between 19 UT and 5 UT on 18–19 January 2013 over the Alaska region down to lower midlatitudes. This study showcases the first use of GUVI for the study of LSTADs. These novel GUVI observations demonstrate the potential for the GUVI far ultraviolet emissions to be used for global‐scale studies of waves and atmospheric disturbances in the thermosphere, a region lacking in long‐term global measurements. These observations typify changes in the radiance from around 140 to 180 km, opening a new window into the behavior of the thermosphere. For the first time, Global Ultraviolet Imager observations of large‐scale traveling ionosphere disturbances (LSTIDs) in far ultraviolet emissions are presented and validated Persistent LSTID/large‐scale traveling atmospheric disturbances (LSTADs) are observed over several hours coinciding with moderate geomagnetic disturbances and a major sudden stratospheric warming (SSW) Along‐track horizontal wavelengths of the atmospheric disturbances are ∼2,000–2,500 km and periods are ∼2–2.5 hr