Statistics of the global tropopause temperature change
Statistics of the global tropopause temperature change
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发表时间：
2006
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通讯作者：
Fan Wen-Xuan
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作者：
Fan Wen-Xuan
用EOF方法分析了近57年(1948~2004年)全球对流层顶温度月平均资料，讨论了对流层顶温度的空间分布和相应的时间变化。结果表明，第一EOF模能较好地反映对流层顶温度的结构分布，且具有明显的季节变化；南半球和北半球温度场的空间分布不同，南半球经向分布稳定，但北半球经向和经向活动较强，槽脊结构也较明显；极地对流层顶温度结构在两个半球具有不同的趋势；热带对流层顶温度的第一EOF模具有全年相同的分布特征；各季节温度场的时间变化具有明显的多时间尺度特征。
The monthly averaged global tropopause temperature data in recent 57 years(from 1948 to 2004) is analyzed by the EOF method,the spatial distribution and corresponding temporal variation are also discussed.The result indicates that the first EOF mode can better reflect the structure distribution of tropopause temperature,and has obvious season variety;the spatial distribution of temperature fields is different in southern and northern hemisphere,the longitudinal distribution is steady in southern hemisphere but the meridional and longitudinal activity is stronger in northern hemisphere,the structure of trough and ridge is also obvious;Polar tropopause temperature structure has different trend in two hemisphere;The first EOF mode of tropical tropopause temperature has the same distribution character all year round;Temporal variation of temperature field in each season appears multi-timescale features obviously.