We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
利用FY-3C 气象卫星GNSS 掩星估计全球重力波变化与分析.
- Authors
金双根; 高超; 李君海
- Abstract
Atmospheric gravity wave is an important atmospheric dynamic disturbance widely existing in the Earth’s almosphere.lt is of great significance to study its distribution and variations for understanding atmospheric physics, atmospheric structure and atmospheric dynamics.Traditional methods of atmospheric gravity wave detection, such as radar and sounding balloon, have the weaknesses of short detection time and low effective detection altitude. The Global Navigation Satellite System (GNSS) Radio Occullalion with the advantages of all-weather, low cost and high accuracy has been widely used in die earth’s atmosphere detection and research, which provides new observation data for die study of regional or global gravity wave variation and activity characteristics.In this paper, the occullalion data of die first Chinese GNSS radio occullalion satellite—Fengyu-3C (FY-3C) are used to obtain the atmospheric temperature profile from August 2014 to December 2016,and then the spatial and temporal distribution of gravity wave parameters is estimated and analyzed for die first time.The results show that the potential energy of gravity wave in winter and summer is stronger than that in spring and autumn due to seasonal convection between die land and the sea. Equatorial convection leads to stronger gravity wave in the equatorial region than in the two polar regions. In summer,gravity wave activity is frequent in die middle and low latitudes of die southern hemisphere, and in winter,gravity waves in the middle and low latitudes of the northern hemisphere are active.With the increase ol altitude, the potential energy of gravity wave decreases gradually.In addition, the topography is the main source of gravity waves in the lower atmosphere.
- Publication
Journal of Nanjing University of Information Science & Technology (Natural Science Edition) / Nanjing Xinxi Gongcheng Daxue Xuebao (ziran kexue ban), 2020, Vol 12, Issue 1, p57
- ISSN
1674-7070
- Publication type
Article
- DOI
10.13878/j.cnki.jnuist.2020.01.008