ENSO循环对中国西部祁连山区气温、降水和出山径流的影响

 根据有关水文气象台、站的观测资料,分析了El Nino事件与祁连山区气温、降水的对应关系,研究了祁连山区出山径流对EI Nino现象的响应。结果表明, EI Nino现象对祁连山区的气温、降水和径流的影响随着发生时间和地段的不同而不同。EI Nino 事件发生之年, 整个祁连山区均出现气温偏高、降水减少及径流偏枯的现象,尤以东段和中段最为明显。El Nino事件次年, 祁连山区东段和中段气温偏高、降水减少及径流偏枯的程度不如El Nino事件当年那样显著,而西段的气温、降水及径流与El Nino事件则无明显关系。

Effect of ENSO Cycle on the Temperature, Precipitation and Runoff n Qilian Mountainous Area, Northwestern China

The corresponding relationship between El Nino events and temperature, precipitation, runoff in the Qilian mountainous area are analyzed based on the observation data of the weather stations and hydrological stations. The results show that the effect of El Nino to temperature, precipitation and runoff in the Qilian mountainous area is different with the dissimilarity of El Nino occurring time and the regions in this area. El Nino events have impact on all of the temperature, precipitation and runoff in the east part of the Qilian mountainous area in current years and the next years, but the impact in El Nino years are more visible than that in the next years. The impact of El Nino events on the temperature, precipitation and runoff in middle and west part of the Qilian mountainous area in the El Nino years and the next years are all inapparent.