DOI: 10.1002/2013JD020203
论文题名: Interannual variability of mesopause zonal winds over Ascension Island: Coupling to the stratospheric QBO
作者: De Wit R.J. ; Hibbins R.E. ; Espy P.J. ; Mitchell N.J.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 21 起始页码: 12052
结束页码: 12060
语种: 英语
英文关键词: interhemispheric coupling
; mesospheric QBO
; meteor radar
; stratospheric QBO
; vertical coupling
Scopus关键词: Radar
; Wind
; Altitude range
; Interannual variability
; mesospheric QBO
; Meteor ablation
; Meteor radars
; Quasi-biennial oscillation
; stratospheric QBO
; Vertical coupling
; Radar measurement
; ablation
; annual variation
; mesosphere
; quasi-biennial oscillation
; radar
; spatiotemporal analysis
; stratosphere
; zonal wind
; Ascension Island
英文摘要: Zonal-wind measurements obtained between October 2001 and July 2011 with the SKiYMET meteor radar located at Ascension Island (8°S, 14°W) have been used to study the interannual variability at meteor ablation altitudes (approximately 78-100 km) and its coupling to the stratospheric quasi-biennial oscillation (QBO). An upper mesospheric QBO (MQBO) with a period of 27.5 months has been detected throughout the observational period. The MQBO is found to be out-of-phase with the stratospheric QBO (SQBO) at 15-20 hPa and in-phase compared to 70 hPa, whereas no significant zero time-lag correlation exists between the long-term mesospheric zonal winds and the SQBO at 40-50 hPa. The MQBO magnitude is found to be 4.1±0.7 m/s at 88 km. No significant change in MQBO magnitude is found throughout the altitude range under consideration. It was found that the MQBO signal is mainly carried around the March equinox, although the MQBO signal is present throughout most of the year, although less pronounced, at the lower altitudes as well. No observational evidence was found that the MQBO, between approximately 78-100 km, plays a role in the interhemispheric ducting of the quasi-16 day wave. Key Points Interannual variability in meteor radar equatorial zonal winds is presented An MQBO with a period of 27.5 months and a magnitude of 4.1+/-0.7 m/s is found Vertical and interhemispheric coupling of GW and PW is discussed ©2013. 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/63174
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: Department of Physics, Norwegian University of Science and Technology, 7491 Trondheim, Norway; Birkeland Centre for Space Science, Bergen, Norway; Centre for Space, Atmospheric and Oceanic Science, Department of Electronic and Electrical Engineering, University of Bath, Bath, United Kingdom
Recommended Citation:
De Wit R.J.,Hibbins R.E.,Espy P.J.,et al. Interannual variability of mesopause zonal winds over Ascension Island: Coupling to the stratospheric QBO[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(21)