摘要
本文指出,青藏高原具有30—50天振荡周期的大气低频系统,在振荡过程中呈现出两种位相:气旋位相和反气旋位相。气旋位相时段对应黄河上游水量偏丰期;反气旋位相时段则对应水量偏枯期。 文中还分析了上述对应关系的可能原因,指出与大气中的低频扰动动能强或弱、低涡活跃或间歇有关。本文的研究为应用大气低频振荡特征预测黄河上游水量枯丰,作了初步有意义的探索。
It is indicated that low frequency systems with 30-50 days period over Qinghai-Xizang Plateau appear two kinds of phases during oscillating process: cyclone phase and anticyclone phase. The period of cyclone phase is responded to rich water time in upper reaches of Yellow River, anticyclone is responded to poor water time.
The possible cause of this relationship is analyzed. The results show it is related to low frequency disturbance kinetic energy to be strong or weak and low votices to be active or inactive. This paper have explored the prediction of water rich or poor in upper reaches of Yellow River by using the characteristics of low frequency oscillation.
出处
《高原气象》
CSCD
北大核心
1992年第1期107-112,共6页
Plateau Meteorology
关键词
青藏高原
黄河上游
大气低频振荡
位相
水量
Qinghai-Xizang Plateau
Upper reaches of Yellow River
Low frequency system
Phase.
