海气系统中不稳定耦合波的空间结构与气候年代际振荡-大气科学学报.PDF

30 5 Vo.l 30 N o. 5 2007 10 Journal ofN anjing Institute ofM eteorology Oct. 2007 1 1 2 2 苏磊 , 陆维松, 邵海燕, 陶丽 ( 1. ; 2. , 210044) : 利用带有深海作用的简单海气耦合模型, 分析了中纬度海气系统中不稳定耦合波的空间结 构, 论了其对气候年代际振荡的影响结果表明: 对于海气系统中的不稳定耦合波, 大气扰动在 位相上超前于海洋扰动, 位相差范围0到 P/2, 特别当位相差为 P/4时, 出现最不稳定海气相互作 用; 大气和海洋扰动振幅之间的关系由风应力系数和海洋加热系数的相对大小决定, 大气扰动振幅 可以小于海洋扰动振幅, 也可以大于海洋扰动振幅; 深海作用系数对于海气耦合波的空间结构总体 影响很小 : 海气耦合; 空间结构; 位相差; 振幅; 深海作用 : P433 : A : 1000-2022( 2007) 05-0657-10 Spatial Features of Unstable CoupledW aves in the A ir-Sea Coupled System and Interde adal Climati O s illations 1 1 2 2 SU Lei, LU W e-i song, SHAO H ai-yan , TAO L i ( 1. Jiangsu Key Laboratory ofM eteorologicalD isaster; 2. Schoo l ofA tm ospheric Sciences, NU IST, Nanjing 210044, China) Abstra t: In order to find out what m ight be the mechanism to drive the inter-decadal oscillation of the clmi ate system, the spatial features of unstable coupledw aves in them id-latitude air-sea system are inves- tigated on the basis of the smi ple air-sea coupled model wh ich includes the deep ocean effects. R esults show that: for the unstable coupled w aves in the air-sea system, the air d isturbance w ave goes ahead of the sea d isturbance w ave by 0 to P/2 in the phase, and especially w hen the phase difference is P/4, th is special spatial structure can cause themost unstable air-sea interaction; in the coup led system, the am pl-i tude relation betw een the air and sea d is