DOI: 10.1002/grl.50158
论文题名: Evidence of long-term change in zonal wind in the tropical lower mesosphere: Observations and model simulations
作者: Venkat Ratnam M. ; Kumar G.K. ; Venkateswara Rao N. ; Murthy B.V.K. ; Laštovička J. ; Qian L.
刊名: Geophysical Research Letters
ISSN: 0094-9347
EISSN: 1944-9078
出版年: 2013
卷: 40, 期: 2 起始页码: 397
结束页码: 401
语种: 英语
Scopus关键词: Anthropogenic changes
; Long-term changes
; Medium frequency radars
; Model simulation
; MST radars
; Perturbation amplitude
; TIME-GCM
; Zonal wind
; Carbon dioxide
; Global warming
; Computer simulation
; anthropogenic effect
; data set
; global warming
; long-term change
; mesosphere
; perturbation
; radar
; tropical meteorology
; zonal wind
; India
英文摘要: In recent years, the mesosphere (50 to 85-100 km) has evoked great scientific interest as long-term changes due to global warming can be clearly captured due to the large perturbation amplitudes at these altitudes. In the present study, zonal wind observations between 70 and 80 km over the Indian region provided by rocketsonde (1977-1991), HRDI/UARS (1991-1999), and MST radar (1995-2010) are used to construct a long-term data set from 1977 to 2010. Using this unprecedented data set, a decreasing trend of 2m/ s/yr is found, changing from strong eastward winds during the 1970s to weak westward winds in recent years. On the other hand, between 80 and 98km using medium frequency radar observations during 1993-2009, no perceptible trend is found. Simulations of NCAR TIME-GCM also showed a similar change in the circulation when CO 2 in the atmosphere is doubled, suggesting role of anthropogenic changes in the dynamics of the mesosphere. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84874896995&doi=10.1002%2fgrl.50158&partnerID=40&md5=a47e348428e11be5b7ce99b7677325f6
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6611
Appears in Collections: 气候减缓与适应
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作者单位: National Atmospheric Research Laboratory, Gadanki, India
Recommended Citation:
Venkat Ratnam M.,Kumar G.K.,Venkateswara Rao N.,et al. Evidence of long-term change in zonal wind in the tropical lower mesosphere: Observations and model simulations[J]. Geophysical Research Letters,2013-01-01,40(2).