NUMERICAL EXPERIMENTS OF EFFECT OF SSTA OVER THE INDIAN OCEAN ON ATMOSPHERIC LOW-FREQUENCY OSCILLATION IN THE EXTRATROPICAL LATITUDE  

作　　者：邱明宇 陆维松 陈汇林 蔡亲波 

机构地区：[1]Hainan Institute of Meteorological Science / Key Laboratory for Meteorological Disaster Prevention and Mitigation in the South China Sea [2]Hainan Climate Center,Haikou 570203 [3]Department of Atmospheric Sciences, Nanjing University of Information,Science and Technology [4]Hainan Climate Center, Haikou 570203

出　　处：《Journal of Tropical Meteorology》2007年第1期73-76,共4页热带气象学报（英文版）

基　　金：Natural Science Foundation of China (40275016);Operation "Six Kinds of Talents Summit"Foundation for Jiangsu Province

摘　　要：Numerical experiments on forcing dissipation and heating response of dipole (unipole) are carried out using global spectral models with quasi-geostrophic barotropic vorticity equations. For each experiment model integration is run for 90 days on the condition of three-wave quasi-resonance. The results are given as follows: Under the effects of dipole (unipole) forcing source and basic flow intensity, there exist strong interactions among the three planetary waves and quasi-biweekly and intraseasonal oscillation of the three planetary waves. In the meantime, the changes in the intensity of dipole or unipole forcing source and basic flow have different frequency modulation effects on LFO in the middle and higher latitudes. The results of the stream function field of three quasi-resonant waves evolving with time confirm that the low-frequency oscillation exists in extratropical latitude.Numerical experiments on forcing dissipation and heating response of dipole （unipole） are carried out using global spectral models with quasi-geostrophic barotropic vorticity equations. For each experiment model integration is run for 90 days on the condition of three-wave quasi-resonance. The results are given as follows： Under the effects of dipole （unipole） forcing source and basic flow intensity, there exist strong interactions among the three planetary waves and quasi-biweekly and intraseasonal oscillation of the three planetary waves. In the meantime, the changes in the intensity of dipole or unipole forcing source and basic flow have different frequency modulation effects on LFO in the middle and higher latitudes. The results of the stream function field of three quasi-resonant waves evolving with time confirm that the low-frequency oscillation exists in extratropical latitude.

关 键 词：Indian Ocean temperature dipole （unipole） frequency modulation waves quasi-resonance atmospheric low-frequency oscillation 

分 类 号：P461.2[天文地球—大气科学及气象学]