摘要
利用西北四省区７３个台站１９６０～１９９０年逐月降水量和平均气温的距平资料，采用综合的经验正交函数（ＥＯＦ）分析方法，对西北四省区春（３～５月份）、夏（６～８月份）、秋（９～１１月份）３个季节降水、气温异常的时空分布特征进行了诊断研究，得到了几种降水和气温异常的典型配置及其反映这些典型场的年际演变规律的时间系数，并在此基础上进一步分析了降水、气温异常的时变特征以及与西北四省区出现较严重干旱年份之间的关系。结果表明，西北四省区不同区域发生较严重干旱的年份与某些时间系数出现极值的年份存在很好的对应关系。
In this paper, based on the monthly average precipitation and air temperature dating dated from 1960 to 1990 at 73 observational stations in Northwest China, we have made a diagnostic study on the features of the spatial and temporal distribution of anomalous temperature and precipitation in Spring, Summer and Autumn in Northwest China by using the EOF method. Some kinds of typical patterns of precipitation correlating with anomalous temperature as well as their interannual changing regularity have been obtained. The results show that there is a good correspondence between the severe drought year in Northwest China and the extremum (maximum or minimum ) year of time coefficients.
出处
《中国沙漠》
CSCD
北大核心
1997年第3期230-236,共7页
Journal of Desert Research
关键词
降水
气温
干旱
时空分布
经验正交函数
Northwest China Precipitation Temperature Comprehensive EOF Method Drought
