文献类型：期刊文献

英文题名：Different Influences on "Wave Turbopause" Exerted by 6.5 DWs and Gravity Waves

作者：Ge, Wei[1];Sheng, Zheng[2,3];Huang, Yingying[4];He, Yang[2];Liao, Qixiang[2];Chang, Shujie[5]

机构：[1]Unit 95806 Chinese Peoples Liberat Army, Beijing 100076, Peoples R China;[2]Natl Univ Def Technol, Coll Meteorol & Oceanog, Changsha 410073, Peoples R China;[3]Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteorol, Nanjing 210094, Peoples R China;[4]Beijing Inst Appl Meteorol, Beijing 100029, Peoples R China;[5]Guangdong Ocean Univ, Coll Ocean & Meteorol, Zhanjiang 524088, Peoples R China

年份：2023

卷号：15

期号：3

外文期刊名：REMOTE SENSING

收录：SCI-EXPANDED(收录号：WOS:000930393800001)、、EI(收录号：20230713592772)、WOS

语种：英文

外文关键词：wave turbopause; gravity waves; 6; 5 DWs

外文摘要：Wave turbopause is defined as the mesospheric altitude level where the temperature fluctuation field indicates a substantial increase in wave amplitude in the vertical direction. It is similar to turbopause in seasonal and latitudinal variations, providing an almost global analysis of turbopause on the basis of satellite measurements rather than localized detection. Previous studies of "wave turbopause" were based on standard deviation of temperature, which is an integrated measure of wave activity. In this study, we distinguish different atmospheric waves and investigate their influences on "wave turbopause". By comparing the altitude of "wave turbopause" with peak height of amplitude (PHA) for gravity waves and 6.5 days waves (6.5 DWs), whose period is approximately 6.5 days in the mesosphere and lower thermosphere, we find that the seasonal variation in altitude of "wave turbopause" is higher at the winter pole and lower at the summer pole, correlated with PHA for 6.5 DWs but anti-correlated with PHA for gravity waves. We infer that gravity waves reach saturation and break at lower altitudes in the winter when Brunt-Vaisala frequency is also lower between 80 and 100 km altitudes. Finally, the results may imply that seasonal variations of the "wave turbopause" are driven mainly by 6.5 DWs.