云贵高原地区1960-2014年气温时空变化特征分析

Analysis of temperature variations over the Yunnan-Guizhou Plateau from 1960 to 2014

利用云贵高原47个气象站点1960-2014年的温度数据以及格点资料,采用统计学方法分析了云贵高原温度的时空变化特征.结果表明,近55 a,云贵高原整体温度为显著的上升趋势,20世纪90年代之后增温速率显著增加,呈西高东低的态势.经验正交分解(EOF)结果表明,无论是年平均温度还是四季温度,EOF1以及对应的标准化时间序列反映出云贵高原呈现一致的增温变化;EOF2则表现出东西反向的变化特征,可能主要受地形以及昆明准静止锋的影响,夏季可能还受到大气环流因素的影响.

Some statistical methods were applied to analyze the spatial-temporal variation characteristics of temperature over the Yunnan-Guizhou Plateau by using the temperature data collected from 47 meteorological stations on the Yunnan-Guizhou Plateau during 1960-2014 and also the grid data.The results showed that there had been a remarkable warming trend of the whole Yunnan-Guizhou Plateau temperature during the recent 55 years,and the warming rates had also increased significantly since 1990,with higher rates in the western part and lower in the eastern part.Both annual temperature and seasonal temperature on the Yunnan-Guizhou Plateau showed the same variation patterns according to an EOF analysis.Yunnan-Guizhou Plateau showed a consistent variation in recent 55 years according to EOF1 and,corresponding to normaliz time series 1,EOF2 indicated that the temperature variation of the eastern plateau was opposite to the western plateau,which might be related to the terrain and Kunming quasi stationary front,and dipole in summer might also have been affected by atmospheric circulation factors.