摘要
利用 196 0— 1998年雅鲁藏布江中游地区 4个代表站的 5～ 8月的降水和气温资料 ,对雅鲁藏布江中游地区初夏、盛夏的旱涝变化规律和周期进行了分析。结果表明 ,初夏旱明显多于涝 ,但重涝多于重旱 ,盛夏涝多于旱。 6 0年代、90年代旱涝分布不均 ,70年代初夏涝、盛夏旱 ;80年代初夏、盛夏以旱为主。初夏旱涝存在 19.5和 2～ 3a的周期 ,盛夏旱涝有 3～
The monthly rainfall data of May to August of 4 stations in middle reaches of Yarlung river during 1960 to 1998 are used, the climate features of early summer and midsummer drought/flood are analyzed. The results show that the frequency of early summer drought is more than that of flood, but the probability of heavy flood is more than that of heavy drought. In midsummer, the frequency of flood is more than drought.The distribution of drought/flood is not uniform in 1960s and 1990s, there are more early summer flood and more midsummer drought during 1970s; the more early summer and midsummer drought in 1980s.The main oscillation periods of drought/flood in early summer are 19.5 and 2～3 years; but those in midsummer are 3～4 years.
出处
《高原气象》
CSCD
北大核心
2002年第1期108-112,共5页
Plateau Meteorology
