| DOI: | 10.1002/grl.50378
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| 论文题名: | Detecting overlapping gravity waves using the S-Transform |
| 作者: | Wright C.J.; Gille J.C.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9115
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| EISSN: | 1944-8846
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| 出版年: | 2013
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| 卷: | 40, 期:9 | | 起始页码: | 1850
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| 结束页码: | 1855
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| 语种: | 英语
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| 英文关键词: | Gravity Waves
; Satellite Measurements
; Stratosphere
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| Scopus关键词: | Antarctic Peninsula
; Gravity wave momentum
; High-resolution dynamics limb sounders
; Regional variability
; Satellite measurements
; Secondary waves
; Stockwell transform
; Wavelength distribution
; Momentum
; Upper atmosphere
; Gravity waves
; atmospheric convection
; detection method
; geographical distribution
; gravity wave
; marine atmosphere
; momentum transfer
; satellite imagery
; stratosphere
; Antarctic Peninsula
; Antarctica
; India
; Southern Ocean
; West Antarctica
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| 英文摘要: | We discuss an adaptation to the widely-used Stockwell Transform based method for the detection of gravity waves to allow the detection of multiple overlapping waves. This adjusted method is applied to data from the High Resolution Dynamics Limb Sounder for the period of May 2006 and is found to change the measured distribution of gravity wave momentum flux on a global scale. An overall 68% increase in measured momentum flux is observed for the 20-30km altitude range, with significant regional variability. The largest absolute increase is over India, the Southern Ocean, and the Antarctic Peninsula, regions previously known to exhibit high levels of momentum flux. A strong relative increase is observed north of the equator, particularly in the tropics; analysis of the wavelength distribution of detected gravity waves shows that the majority of this increase is due to the detection of small vertical- and horizontal-scale waves which were presumably previously masked by higher-amplitude events in the same profile. Key PointsIncluding secondary waves increases measured MF by 68%The geographic distribution is alteredThis is most important in convective regions ©2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879123830&doi=10.1002%2fgrl.50378&partnerID=40&md5=695da3f45fd13cb5909703183915132c
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/6379
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Atmospheric Chemistry Division, National Center for Atmospheric Research, Mitchell Lane, Boulder, CO 80301, United States
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| Recommended Citation: | |
Wright C.J.,Gille J.C.. Detecting overlapping gravity waves using the S-Transform[J]. Geophysical Research Letters,2013-01-01,40(9).
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