季降水量 meaning in English

seasonal precipitation

There are obvious interannual variations in spring precipitation in shandong province , and the oscillation period is about 4 . 8 - 6 year
应用自然正交函数展开( eof )方法，分析了山东省38年春季月、季降水量。
Results show that the spatial distribution of the precipitation of the west is very uneven and obviously different in every quarter ; the characteristics of precipitation is droughty and less - rain in almost all part in winter . plentiful in summer , spring and autumn are transition phases , rainfall of autumn is more than that of spring in the most of region ; relative variability of each season rainfall is bigger than that of year , the variability is biggest in winter , but smallest in summer . alike between spring and autnmn and comprative in numerical value ; the area of least precipitation is in talimu basin and the northwest of chaidamubasin , not in the northwest of china
研究发现：西部地区年降水量的空间分布极不均匀，局地差异大；冬季绝大部分地区干旱少雨，夏季雨量丰沛，春秋季是过渡阶段，大部分地区秋雨多于春雨；各季降水量的相对变率大于年变率，夏季最小，冬季最大，春秋两季相似，数值上与冬季相差无几；我国雨量最少的地区位于柴达木盆地西北部和塔里木盆地，并不在我国的最西北角。