120-day variability in migrating tides from CMAM30 winds

IF 1.8 4区地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2024-04-06 DOI:10.1016/j.jastp.2024.106230

Subhajit Debnath, Uma Das

引用次数: 0

Abstract

Migrating tides and their variability are investigated using Canadian Middle Atmosphere Model (CMAM30) zonal and meridional wind data from 1979 to 2010. Migrating diurnal (DW1) and semi-diurnal (SW2) tides show strong annual and semi-annual variations. The former is stronger in the Southern Hemisphere and the latter is significant over sub-tropical latitudes in the mesosphere. Wavelet analysis in the mesopause region shows a 120-day variability in SW2 tide over equator and $\sim \pm 2 0^{\circ}$ with no apparent connection with solar activity. A close inspection shows that the 120-day variation is not due to variations in solar energy inputs.

查看原文本刊更多论文

根据 CMAM30 风向得出的 120 天潮汐迁移变化率

利用加拿大中层大气模式（CMAM30）1979 年至 2010 年的带状和经向风数据，研究了洄游潮及其变异性。昼夜移动潮汐（DW1）和半昼夜移动潮汐（SW2）显示出强烈的年度和半年度变化。前者在南半球较强，后者在中层的亚热带纬度地区显著。中层顶地区的小波分析表明，赤道和±20∘上空的 SW2 潮汐有 120 天的变化，与太阳活动无明显联系。仔细观察可以发现，120 天的变化并不是由于太阳能量输入的变化造成的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

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

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.

文献相关原料

公司名称	产品信息	采购帮参考价格