论文标题
来自地面观测的金星中层中热波的三维结构
Three-dimensional structure of thermal waves in Venus' mesosphere from ground-based observations
论文作者
论文摘要
NASA红外望远镜设施的Texes仪器获得了金星的高光谱分辨率观测。这些观察结果侧重于791.4 cm $^{ - 1} $的CO $ _2 $吸收功能，作为此吸收功能的形状，可用于检索Venus的Mesosphere中的垂直温度曲线。通过扫描地球，我们能够建立金星大气的三维温度图，覆盖一个面向地球的半球和60--83公里的高度范围。从2019年2月12日起，温度图清楚地显示了行星尺度热浪的三维结构。在金星的中部纬度中，这种波形模式看起来最强，区域波数为2--4，波正面向东倾斜，高度为每公里8--15度。这与金星上云甲板向上传播的热潮汐一致。地面观察结果为不断研究金星的温度结构提供了机会。
High spectral resolution observations of Venus were obtained with the TEXES instrument at NASA's Infrared Telescope Facility. These observations focus on a CO$_2$ absorption feature at 791.4 cm$^{-1}$ as the shape of this absorption feature can be used to retrieve the vertical temperature profile in Venus' mesosphere. By scan-mapping the planet, we are able to build up three-dimensional temperature maps of Venus' atmosphere, covering one Earth-facing hemisphere and an altitude range of 60--83 km. A temperature map from February 12, 2019 clearly shows the three-dimensional structure of a planetary-scale thermal wave. This wave pattern appears strongest in the mid-latitudes of Venus, has a zonal wavenumber of 2--4 and the wave fronts tilt eastward with altitude at an angle of 8--15 degrees per km. This is consistent with a thermal tide propagating upwards from Venus' upper cloud decks. Ground-based observations provide the opportunity to study Venus' temperature structure on an ongoing basis.
