A QUASI-BIENNIAL OSCILLATION SIGNAL IN GENERAL-CIRCULATION MODEL SIMULATIONS

被引:23
作者
CARIOLLE, D
AMODEI, M
DEQUE, M
MAHFOUF, JF
SIMON, P
TEYSSEDRE, H
机构
[1] Meteo-France, Centre National de Recherches Mété Orologiques, 31057 Toulouse Cedex, 42, Avenue Coriolis
关键词
D O I
10.1126/science.261.5126.1313
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The quasi-biennial oscillation (QBO) is a free atmospheric mode that affects the equatorial lower stratosphere. With a quasi-regular frequency, the mean equatorial zonal wind alternates from easterly to westerly regimes. This oscillation is zonally symmetric about the equator, has its largest amplitude in the latitudinal band from 20-degrees-S to 20-degrees-N, and has a mean period of about 27 months. The QBO appears to originate in the momentum deposition produced by the damping in the stratosphere of equatorial waves excited by diabatic thermal processes in the troposphere. The results of three 10-year simulations obtained with three general circulation models are reported, all of which show the development in the stratosphere of a QBO signal with a period and a spatial propagating structure that are in good agreement with observations without any ad hoc parameterization of equatorial wave forcing. Although the amplitude of the oscillation in the simulations is still less than the observed value, the result is promising for the development of global climate models.
引用
收藏
页码:1313 / 1316
页数:4
相关论文
共 28 条
[1]  
ANDREWS DG, 1976, J ATMOS SCI, V33, P2049, DOI 10.1175/1520-0469(1976)033<2049:PWIHAV>2.0.CO
[2]  
2
[3]  
[Anonymous], 1961, METEOROL MAG
[4]  
BOVILLE BA, 1992, J ATMOS SCI, V49, P785, DOI 10.1175/1520-0469(1992)049<0785:EWIASG>2.0.CO
[5]  
2
[6]   DYNAMICS AND THE OZONE DISTRIBUTION IN THE WINTER STRATOSPHERE - MODELING THE INTER-HEMISPHERIC DIFFERENCES [J].
CARIOLLE, D ;
AMODEI, M ;
SIMON, P .
JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS, 1992, 54 (05) :627-640
[7]  
COURTIER P, 1992, 1991 P WORKSH NUM ME, P13
[8]   A POSSIBLE RELATIONSHIP BETWEEN INTERANNUAL VARIABILITY IN ANTARCTIC OZONE AND THE QUASI-BIENNIAL OSCILLATION [J].
GARCIA, RR ;
SOLOMON, S .
GEOPHYSICAL RESEARCH LETTERS, 1987, 14 (08) :848-851
[9]  
GRAY LJ, 1987, TRANSPORT PROCESSES, P199