Winter noctilucent clouds following sudden stratospheric warming: First observations

IF 1.8 4区 地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS
Oleg S. Ugolnikov
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引用次数: 0

Abstract

Mesospheric structures identical to summer noctilucent clouds were observed during the nights of December 17–19, 2024 in Siberian Russia. Based on the available photo data, the mean altitude of the clouds 70.1 ± 1.5 km was measured by umbral colorimetric method. This coincided spatially and temporary with a deep temperature minimum below 160K in mesosphere, following the polar vortex displacement and the warming of stratosphere below the clouds. The satellite data on temperature and water vapor is used to study the nature of this unexpected event.
2024 年 12 月 17 日至 19 日夜间,在俄罗斯西伯利亚观测到了与夏季夜光云相同的中间层结构。根据现有的照片数据,用本体比色法测得云层的平均高度为 70.1 ± 1.5 千米。这在空间和时间上与中间层低于 160K 的深度最低温度相吻合,这是在极地涡旋位移和云层下方平流层变暖之后发生的。关于温度和水蒸气的卫星数据被用来研究这一意外事件的性质。
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来源期刊
Journal of Atmospheric and Solar-Terrestrial Physics
Journal of Atmospheric and Solar-Terrestrial Physics 地学-地球化学与地球物理
CiteScore
4.10
自引率
5.30%
发文量
95
审稿时长
6 months
期刊介绍: The Journal of Atmospheric and Solar-Terrestrial Physics (JASTP) is an international journal concerned with the inter-disciplinary science of the Earth''s atmospheric and space environment, especially the highly varied and highly variable physical phenomena that occur in this natural laboratory and the processes that couple them. The journal covers the physical processes operating in the troposphere, stratosphere, mesosphere, thermosphere, ionosphere, magnetosphere, the Sun, interplanetary medium, and heliosphere. Phenomena occurring in other "spheres", solar influences on climate, and supporting laboratory measurements are also considered. The journal deals especially with the coupling between the different regions. Solar flares, coronal mass ejections, and other energetic events on the Sun create interesting and important perturbations in the near-Earth space environment. The physics of such "space weather" is central to the Journal of Atmospheric and Solar-Terrestrial Physics and the journal welcomes papers that lead in the direction of a predictive understanding of the coupled system. Regarding the upper atmosphere, the subjects of aeronomy, geomagnetism and geoelectricity, auroral phenomena, radio wave propagation, and plasma instabilities, are examples within the broad field of solar-terrestrial physics which emphasise the energy exchange between the solar wind, the magnetospheric and ionospheric plasmas, and the neutral gas. In the lower atmosphere, topics covered range from mesoscale to global scale dynamics, to atmospheric electricity, lightning and its effects, and to anthropogenic changes.
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