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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ElNino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。
According to the observational data of hydrological meteorological stations and stations, the correspondence between El Nino event and the temperature and precipitation in the Qilian Mountains was analyzed, and the response of the runoff from the Qilian Mountains to the EI Nino phenomenon was studied. The results show that the EI Nino effect on the temperature, precipitation and runoff in the Qilian Mountains varies with time and location. In the year of EI Nino event, the phenomena of high temperature, decreasing precipitation and heavy runoff appeared in the whole Qilian Mountains, especially in the eastern and middle sections. In the next year after El Nino, the temperatures in the eastern and middle parts of the Qilian Mountains were lower than those in the El Nino event. However, the temperature, precipitation and runoff in the western segment were not significantly related to El Nino events.