DOI: 10.1002/2017JA024984
Scopus记录号: 2-s2.0-85040742020
论文题名: Exploring Wave-Wave Interactions in a General Circulation Model
作者: Nystrom V. ; Gasperini F. ; Forbes J.M. ; Hagan M.E.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 1 起始页码: 827
结束页码: 847
语种: 英语
英文关键词: diurnal tides
; Kelvin waves
; MERRA/TIME-GCM
; MLT dynamics
; nonlinear interactions
; primary and secondary waves
英文摘要: Nonlinear interactions involving Kelvin waves with (periods, zonal wave numbers) = (3.7d, s =− 1) (UFKW1) and = (2.4d, s =− 1) (UFKW2) and s = 0 and s = 1 quasi 9 day waves (Q9DW) with diurnal tides DW1, DW2, DW3, DE2, and DE3 are explored within a National Center for Atmospheric Research (NCAR) thermosphere-ionosphere-mesosphere electrodynamics general circulation model (TIME-GCM) simulation driven at its ∼30 km lower boundary by interpolated 3-hourly output from Modern-Era Retrospective Analysis for Research and Applications (MERRA). The existence of nonlinear wave-wave interactions between the above primary waves is determined by the presence of secondary waves (SWs) with frequencies and zonal wave numbers that are the sums and differences of those of the primary (interacting) waves. Focus is on 10–21 April 2009, when the nontidal dynamics in the mesosphere-lower thermosphere (MLT) region is dominated by UFKW and when identification of SW is robust. Fifteen SWs are identified in all. An interesting triad is identified involving UFKW1, DE3, and a secondary UFKW4 = (1.5d, s =− 2): The UFKW1-DE3 interaction produces UFKW4, the UFKW4-DE3 interaction produces UFKW1, and the UFKW1 interaction with UFKW4 produces DE3. At 120 km the dynamic range of the reconstructed latitude-longitude zonal wind field due to all of the SW is roughly half that of the primary waves, which produced them. This suggests that nonlinear wave-wave interactions could significantly modify the way that the lower atmosphere couples with the ionosphere. ©2018. 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/114759
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Ann and H.J. Smead Department of Aerospace Engineering Sciences, University of Colorado Boulder, Boulder, CO, United States; Department of Physics, Utah State University, Logan, UT, United States
Recommended Citation:
Nystrom V.,Gasperini F.,Forbes J.M.,et al. Exploring Wave-Wave Interactions in a General Circulation Model[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(1)