摘要
本文利用自然正交函数对中国100个站近510年旱涝资料进行分解。取分解出的前三个特征向量,将中国旱涝资料划分为6种炎型。从而得出近510年旱涝型序列,并对其环流特征进行讨论。
In this paper,using the empirical orthogonal functions the dryness/wetness data of 100 sta-tions in China are calculated for the last 510—year period.By using the first three eigenveetor ofEOF,the yearly dryness/wetness patterns in China are classified as six types.Thus,the time se-ries of the dryness/wetness types for the last 510—year period are obtained and their characteris-tics of atmospheric circulation are discussed.
