DOI: 10.1002/2017JE005449
Scopus记录号: 2-s2.0-85041569277
论文题名: Three-Dimensional Structures of Thermal Tides Simulated by a Venus GCM
作者: Takagi M. ; Sugimoto N. ; Ando H. ; Matsuda Y.
刊名: Journal of Geophysical Research: Planets
ISSN: 21699097
出版年: 2018
卷: 123, 期: 2 起始页码: 335
结束页码: 352
语种: 英语
英文关键词: circulation between the subsolar and antisolar points
; Hadley circulation
; thermal tide
; Venus atmosphere
Scopus关键词: atmospheric circulation
; computer simulation
; diurnal variation
; Hadley cell
; jet
; three-dimensional modeling
; Venus
英文摘要: Thermal tides in the Venus atmosphere are investigated by using a GCM named as AFES-Venus. The three-dimensional structures of wind and temperature associated with the thermal tides obtained in our model are fully examined and compared with observations. The result shows that the wind and temperature distributions of the thermal tides depend complexly on latitude and altitude in the cloud layer, mainly because they consist of vertically propagating and trapped modes with zonal wave numbers of 1–4, each of which predominates in different latitudes and altitudes under the influence of mid- and high-latitude jets. A strong circulation between the subsolar and antisolar (SS-AS) points, which is equivalent to a diurnal component of the thermal tides, is superposed on the superrotation. The vertical velocity of SS-AS circulation is about 10 times larger than that of the zonal-mean meridional circulation (ZMMC) in 60–70 km altitudes. It is suggested that the SS-AS circulation could contribute to the material transport, and its upward motion might be related to the UV dark region observed in the subsolar and early afternoon regions in low latitudes. The terdiurnal and quaterdiurnal tides, which may be excited by the nonlinear interactions among the diurnal and semidiurnal tides in middle and high latitudes, are detected in the solar-fixed Y-shape structure formed in the vertical wind field in the upper cloud layer. The ZMMC is weak and has a complex structure in the cloud layer; the Hadley circulation is confined to latitudes equatorward of 30°, and the Ferrel-like one appears in middle and high latitudes. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114536
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Department of Astrophysics and Atmospheric Science, Faculty of Science, Kyoto Sangyo University, Kyoto, Japan; Research and Education Center for Natural Sciences, Department of Physics, Keio University, Yokohama, Japan; Department of Astronomy and Earth Science, Tokyo Gakugei University, Koganei, Japan
Recommended Citation:
Takagi M.,Sugimoto N.,Ando H.,et al. Three-Dimensional Structures of Thermal Tides Simulated by a Venus GCM[J]. Journal of Geophysical Research: Planets,2018-01-01,123(2)