黄河源区湖泊水环境特征及其对气候变化的响应

Water environment characteristics and regional climate response of typical lakes in Yellow River headwater area

为了掌握青藏高原东北部湖泊水环境状况和气候变化特征,特地开展了青海境内黄河源区湖泊现状调查,结果发现黄河源区湖泊呈现水位升高和水量增大现象。收集近50年来气候资料得到:区域气候整体处于气温升高,降水趋减的态势,近几年降水呈现增多;区域内部有效降水存在差异:东部有效降水逐步减少,西部玛多有效降水呈逐年增大。湖泊水位升高的水源主要来自气候降水。应与区域气候波动周期的丰水阶段有关。

In order to accurately know lake water environment conditions in the northeast of Qinghai-Tibet Plateau,lakes＇ surveys were carried out in Yellow River source region.The results showed that lakes water level in Yellow River headwater area increased.By analyzing the climate data in recent 50 years we found out that regional climate existed drought-affected differences in the whole region.Effective rainfall in eastern presented gradually reduce trend.The effective rainfall increased year by year in western area of Maduo.Increased water for lakes came mainly from precipitation,and it was related.the wet phase of regional climate fluctuations.