海气系统中不稳定耦合波的空间结构与气候年代际振荡  

Spatial Features of Unstable Coupled Waves in the Air-Sea Coupled System and Interdecadal Climatic Oscillations

作　　者：苏磊[1] 陆维松[1] 邵海燕[2] 陶丽[2] 

机构地区：[1]南京信息工程大学江苏省气象灾害重点实验室,江苏南京210044 [2]南京信息工程大学大气科学学院,江苏南京210044

出　　处：《南京气象学院学报》2007年第5期657-666,共10页Journal of Nanjing Institute of Meteorology

基　　金：国家自然科学基金资助项目(40275016);国家教育部"高等学校博士学科点专项科研基金"项目

摘　　要：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,讨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π/2,特别当位相差为π/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。In order to find out what might be the mechanism to drive the inter-decadal oscillation of the climate system, the spatial features of unstable coupled waves in the mid-latitude air-sea system are investigated on the basis of the simple air-sea coupled model which includes the deep ocean effects. Results show that： for the unstable coupled waves in the air-sea system, the air disturbance wave goes ahead of the sea disturbance wave by 0 to π/2 in the phase, and especially when the phase difference is π/4, this special spatial structure can cause the most unstable air-sea interaction;in the coupled system, the amplitude relation between the air and sea disturbance waves is determined by the relative size of wind stress and ocean heating coefficients. The amplitude of air disturbance may be larger or smaller than that of sea disturbance ; and the deep ocean coefficient brings little change to the spatial structure of the air-sea couple waves.

关 键 词：海气耦合 空间结构 位相差 振幅 深海作用 

分 类 号：P732.6[天文地球—海洋科学]