%0 Journal Article
%T Nonlinear Three-Wave Interaction among Barotropic Rossby Waves in a Large-scale Forced Barotropic Flow
%A Luo Dehai
%A <br>Luo
%A Dehai
%J 大气科学进展
%D 1999
%I 
%X In this paper. the coupling equations describing nonlinear three-wave interaction amongRossby waves including the forcing of an external vorticity source are obtained. Under certainconditions, the coupling equations with a constant amplitude forcing, the stability analysis indicates that when the amplitude of the external forcing increases to a certain extent, a pitchforkbifurcation occurs. Also. it is shown fi-o m numerical results that the bifurcation can lead to chaoticbehavior of" strange" attractor. For the obtained three-variable equation, when the amplitude ofmodulated external forcing gradually increases, a Period-doubling bifurcation is found to lead tochaotic behavior. Thus, in a nonlinear three-wave coupling model in the large-scale forcedbarotropic atmospheric flow, chaotic behavior can be observed. This chaotic behavior can explainin part 30-60-day low-flequency oscillations observed in mid-high latitudes.
%K Rossby waves
%K Three-wave interaction
%K 30-60-day low frequency oscillation<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=28A2F569B2458C17&jid=5434AFBF6CB6E7E8D67733B541F211C7&aid=B9B2400F77CDF20278943EC7FACA08C5&yid=B914830F5B1D1078&vid=7801E6FC5AE9020C&iid=38B194292C032A66&sid=9B95A71E6639C039&eid=4D4C81DBA842B7BD&journal_id=0256-1530&journal_name=大气科学进展&referenced_num=0&reference_num=25