全球气候变化对咸阳永寿县气候的影响

近50年来,永寿县异常偏暖集中在90年代初期,偏冷集中在1993年以前。70到80年代为丰水期,90年代为枯水期。历史上年降水显著偏多主要在80年代期,异常偏多不存在,1974年异常偏少,而显著偏少是1992、1994年。近几年年平均气温明显升高,年降水量明显减少,特别是以春季气温升高和降水减少最为显著。气候变化以变暖为主要特征,温度变化是直接和主动的,而降水的的变化是间接和被动的,是对温度变化的响应。

nfluence of Whole World Climatic Change on the Climate of Xianyang Yungshow County

During the past 50 years,abnormal warm of Yongshou was concentrated in the early 1990s,with the colder period before 1993.70s to 80s years was the wet period,and 90s as the dry season.In the history,precipitation significantly above the normal mainly happened in the 1980s,and there was no unusual ones,with few exceptions in 1974 and significantly less than normal in 1992 and 1994.In recent years,average annual temperature was significantly higher,with annual precipitation decreased significantly,especially spring higher temperatures and reduced precipitation.Climate change to warming as the main feature,the temperature change is direct and active,while the precipitation change is indirect and passive,which is a response to temperature changes.