DOI: 10.1002/jgrd.50859
论文题名: Seasonal variations in lower stratospheric gravity wave energy above the Falkland Islands
作者: Moffat-Griffin T. ; Jarvis M.J. ; Colwell S.R. ; Kavanagh A.J. ; Manney G.L. ; Daffer W.H.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 19 起始页码: 10861
结束页码: 10869
语种: 英语
英文关键词: gravity waves
Scopus关键词: Wave energy conversion
; Wave propagation
; Wave transmission
; Antarctic Peninsula
; Lower stratosphere
; Propagation direction
; Seasonal variation
; Upward propagating gravity waves
; Vertical direction
; Wave characteristics
; Wave energy density
; Gravity waves
; airport
; gravity wave
; seasonal variation
; stratosphere
; wave energy
; wave field
; wave propagation
; Falkland Islands (Malvinas)
英文摘要: The gravity wavefield in the lower stratosphere (between 15 km and 22 km altitude) above Mount Pleasant Airport (51°49′S, 58°26′W) on the Falkland Islands is studied using over 2100 high-resolution radiosonde soundings from 2002 to 2010. The seasonal variation in vertical direction of propagation shows a small decrease in numbers of upward propagating waves that is related to critical level filtering; however, there is a very large increase in numbers of downward propagating waves between July and September; this is attributed to the proximity of the edge of the polar vortex. There is a seasonal variation in gravity wave energy density, with a large peak during the austral autumn equinox; this is markedly different to results in the literature both from Rothera, on the Antarctic Peninsula, and stations on the main Antarctic continent. This seasonal pattern has been shown to be linked to variations in the sources of upward propagating gravity waves. The seasonal variation in gravity wave characteristics above Mount Pleasant Airport seen in our results suggests that the gravity wavefield in this region is determined by a combination of different gravity wave sources located above and below the lower stratosphere. Key Points Identifying gravity wave sources affecting the stratosphere above the Falklands Examining seasonal variation in gw energy density Examining seasonal variation in gw vertical propagation direction ©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/63231
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
There are no files associated with this item.
作者单位: British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, United Kingdom; NorthWest Research Associates, Socorro NM, United States; New Mexico Institute of Mining and Technology, Socorro NM, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena CA, United States
Recommended Citation:
Moffat-Griffin T.,Jarvis M.J.,Colwell S.R.,et al. Seasonal variations in lower stratospheric gravity wave energy above the Falkland Islands[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(19)