物理学报2011，Vol.60Issue(5)：856-864,9.
北半球环流系统季节内及年际以上振荡信号的信息传输
Information communication of the northern hemisphere on intra-seasonal and over inter-annual oscillation signals
摘要
Abstract
Basic characteristics and form of intra-seasonal and over inter-annual variations were extracted through filtering using the reanalysis data of monthly geopotential height from NCEP/NCAR. Then information theory was applied to the filtered data to analyze the communication among the intra-systems between the low and mid-high latitudes. The results were found that the information loss rate of intra-seasonal oscillation signal is higher than that of over inter-annual signal, and the directions of two signals' communication are opposite in particular regions. The information loss rate at low latitudes is higher than that at mid-high latitudes for both time scale signals, and it is distinct between the lands and the oceans in meridional average. With respect to the altitudes, the information loss rate of over inter-annual oscillation signal at low latitudes is rather high, but it is low at mid-high latitudes over all troposphere and bottom of stratosphere. For the intraseasonal oscillation signal, the information loss rate is high at low altitude but low at high altitude. The study of communication between the low latitude and mid-high latitude of the circulation system on the two time scales provides a new way to understand the predictability and interaction of different parts in the climate system.关键词
滤波/高度场/信息损失率Key words
filtering/ geopotential height field/ information loss rate引用本文复制引用
冯爱霞,龚志强,王启光,孙树鹏,封国林..北半球环流系统季节内及年际以上振荡信号的信息传输[J].物理学报,2011,60(5):856-864,9.基金项目
国家自然科学基金(批准号:40930952和40705031),国家科技支撑计划(批准号:2007BAC29B01)资助的课题. （批准号:40930952和40705031）
