DOI: 10.1002/2015JD023802
论文题名: Intermittency of gravity wave momentum flux in the mesopause region observed with an all-sky airglow imager
作者: Cao B. ; Liu A.Z.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2016
卷: 121, 期: 2 起始页码: 650
结束页码: 663
语种: 英语
英文关键词: gravity waves
; intermittency
; mesosphere
; remote sensing
Scopus关键词: equipment
; gravity wave
; magnitude
; mesopause
; mesosphere
; mountain region
; power law distribution
; probability density function
; remote sensing
; Hawaii [United States]
; Hawaiian Islands
; Maui
英文摘要: The intermittency of gravity wave momentum flux (MF) near the OH airglow layer (∼87 km) in the mesopause region is investigated for the first time using observation of all-sky airglow imager over Maui, Hawaii (20.7°N, 156.3°W), and Cerro Pachõn, Chile (30.3°S, 70.7°W). At both sites, the probability density function (pdf) of gravity wave MF shows two distinct distributions depending on the magnitude of the MF. For MF smaller (larger) than ∼16 m2 s-2 (0.091 mPa), the pdf follows a lognormal (power law) distribution. The intermittency represented by the Bernoulli proxy and the percentile ratio shows that gravity waves have higher intermittency at Maui than at Cerro Pachõn, suggesting more intermittent background variation above Maui. It is found that most of the MF is contributed by waves that occur very infrequently. But waves that individually contribute little MF are also important because of their higher occurrence frequencies. The peak contribution is from waves with MF around ∼2.2 m2 s-2 at Cerro Pachõn and ∼5.5 m2 s-2 at Maui. Seasonal variations of the pdf and intermittency imply that the background atmosphere has larger influence on the observed intermittency in the mesopause region. © 2015. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62929
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: Center for Space and Atmospheric Research, Department of Physical Sciences, Embry-Riddle Aeronautical University, Daytona Beach, FL, United States
Recommended Citation:
Cao B.,Liu A.Z.. Intermittency of gravity wave momentum flux in the mesopause region observed with an all-sky airglow imager[J]. Journal of Geophysical Research: Atmospheres,2016-01-01,121(2)