globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2016JD025435
论文题名:
Low-frequency oscillations of the gravity wave energy density in the lower atmosphere at low latitudes revealed by U.S. radiosonde data
作者: Li H.Y.; Huang C.M.; Zhang S.D.; Huang K.M.; Zhang Y.; Gong Y.; Gan Q.; Jia Y.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2016
卷: 121, 期:22
起始页码: 458
结束页码: 473
语种: 英语
英文关键词: gravity wave ; low-frequency oscillation
Scopus关键词: atmospheric convection ; gravity wave ; kinetic energy ; latitude ; potential energy ; quasi-biennial oscillation ; radiosonde ; solar cycle ; stratosphere-troposphere interaction ; wave energy ; zonal wind ; United States
英文摘要: We adopted 14 year (from 1998 to 2011) radiosonde data from 16 stations at latitudes between 14.33°S to 29.37°N to investigate the low-frequency oscillations of inertial gravity wave energy densities (including kinetic energy density, potential energy density, and total energy density) in the lower atmosphere from 2 km to 30 km. Apparent signatures of 11 year solar cycle and quasi-biennial oscillation (QBO) were found in the gravity wave energy densities in the troposphere and lower stratosphere, respectively. Detailed analyses suggested that the 11 year oscillation and QBO of gravity wave activity might be due to the 11 year oscillation of convection activity and zonal wind QBO modulation, respectively. Besides, the gravity wave energy also showed a 35.2 month oscillation in the lower stratosphere, which might be generated by the interaction between the QBO (with the period of 26.7 months), and the 11 year solar cycle, while more possible causes are the direct modulation from the background zonal wind. Our results showed that the QBO signature in gravity wave total energy density could extend northward to over 20°N in the Northern Hemisphere, while the 11 year solar cycle in gravity wave activity could only extend to lower than 7.5°N. The oscillation with the period of 35.2 months may be a prolonged QBO in both gravity wave activity and background zonal wind. ©2016. American Geophysical Union. All Rights Reserved.
资助项目: 41374152 ; 41374155 ; 41521063 ; 41531070
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62801
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: School of Electronic Information, Wuhan University, Wuhan, China; Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan, China; State Observatory for Atmospheric Remote Sensing, Wuhan, China; State Key Laboratory of Information Engineering in Surveying, Mapping, and Remote Sensing, Wuhan University, Wuhan, China; College of Hydrometeorology, Nanjing University of Information Science and Technology, Nanjing, China

Recommended Citation:
Li H.Y.,Huang C.M.,Zhang S.D.,et al. Low-frequency oscillations of the gravity wave energy density in the lower atmosphere at low latitudes revealed by U.S. radiosonde data[J]. Journal of Geophysical Research: Atmospheres,2016-01-01,121(22)
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