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Variations of global gravity waves derived from 14 years of SABER temperature observations
Liu, Xiao; Yue, Jia; Xu, Jiyao; Garcia, Rolando R.; Russell, James M., III; Mlynczak, Martin; Wu, Dong L.; Nakamura, Takuji; Liu, X (reprint author), Henan Normal Univ, Sch Math & Informat Sci, Henan Engn Lab Big Data Stat Anal & Optimal Contr, Xinxiang, Peoples R China.; Liu, X (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing, Peoples R China.
作者部门空间科学部
发表期刊JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
2017
卷号122期号:12页码:6231-6249
ISSN2169-897X
语种英语
摘要The global gravity wave (GW) potential energy (PE) per unit mass is derived from SABER (Sounding of the Atmosphere using Broadband Emission Radiometry) temperature profiles over the past 14 years (2002-2015). Since the SABER data cover longer than one solar cycle, multivariate linear regression is applied to calculate the trend (means linear trend from 2002 to 2015) of global GW PE and the responses of global GW PE to solar activity, to QBO (quasi-biennial oscillation) and to ENSO (El Nino-Southern Oscillation). We find a significant positive trend of GW PE at around 50 degrees N during July from 2002 to 2015, in agreement with ground-based radar observations at a similar latitude but from 1990 to 2010. Both the monthly and the deseasonalized trends of GW PE are significant near 50 degrees S. Specifically, the deseasonalized trend of GW PE has a positive peak of 12-15% per decade at 40 degrees S-50 degrees S and below 60 km, which suggests that eddy diffusion is increasing in some places. A significant positive trend of GW PE near 50 degrees S could be due to the strengthening of the polar stratospheric jets, as documented from Modern Era Retrospective-analysis for Research and Applications wind data. The response of GW PE to solar activity is negative in the lower and middle latitudes. The response of GW PE to QBO (as indicated by 30 hPa zonal winds over the equator) is negative in the tropical upper stratosphere and extends to higher latitudes at higher altitudes. The response of GW PE to ENSO (as indicated by the Multivariate ENSO Index) is positive in the tropical upper stratosphere. Plain Language Summary Gravity waves (GWs) are disturbances of the atmosphere with horizontal wavelengths of several kilometers to several thousand kilometers. GWs can be generated by many sources, e.g., wind jets, deep convection, and flow over topography. The global GW potential energy (PE) per unit mass is derived from SABER (Sounding of the Atmosphere using Broadband Emission Radiometry) temperature profiles over the past 14 years (2002-2015). We find a significant positive trend of GW PE at around 50 degrees N during July from 2002 to 2015. Both the monthly and the deseasonalized trends in of GW PE are significant near 50 degrees S. Specifically, the deseasonalized trend of GW PE has a positive peak of 12-15% per decade at 40 degrees S-50 degrees S and below 60 km, which suggests that eddy diffusion is increasing in some places. The response of GW PE to solar activity is negative in the lower and middle latitudes. The response of GW PE to QBO (as indicated by 30 hPa zonal winds over the equator) is negative in the tropical upper stratosphere and extends to higher latitudes at higher altitudes. The response of GW PE to ENSO (as indicated by the MEI index) is positive in the tropical upper stratosphere.
收录类别SCI
文献类型期刊论文
条目标识符http://ir.nssc.ac.cn/handle/122/6136
专题空间科学部
通讯作者Liu, X (reprint author), Henan Normal Univ, Sch Math & Informat Sci, Henan Engn Lab Big Data Stat Anal & Optimal Contr, Xinxiang, Peoples R China.; Liu, X (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing, Peoples R China.
推荐引用方式
GB/T 7714
Liu, Xiao,Yue, Jia,Xu, Jiyao,et al. Variations of global gravity waves derived from 14 years of SABER temperature observations[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(12):6231-6249.
APA Liu, Xiao.,Yue, Jia.,Xu, Jiyao.,Garcia, Rolando R..,Russell, James M., III.,...&Liu, X .(2017).Variations of global gravity waves derived from 14 years of SABER temperature observations.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(12),6231-6249.
MLA Liu, Xiao,et al."Variations of global gravity waves derived from 14 years of SABER temperature observations".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.12(2017):6231-6249.
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