摘要
采用气候倾向率和趋势系数方法对达州6个气象站1960年以来气温、降水资料进行统计分析,结果表明:(1)1960年以来达州市年平均气温呈小幅上升的趋势,冬、春、秋三季增温,而夏季降温,气温年较差减小。20世纪80年代降温显著,90年代以后气温明显上升。(2)降水量趋势性变化不显著,总体呈略为增加的趋势。春、秋季降水减少,冬、夏季降水增多。近几年强降水频发,同时出现严重干旱。降水的相对集中和气温的升高,将导致干旱和洪涝发生的强度加重。
Based on the air temperature and precipitation data of 6 meteorological stations in Dazhou from 1960, climate variations were analyzed by calculating climate trend coefficient and climate tendency ratio. The results showed that ： （ 1 ） annual mean temperature has increased slightly in Dazhou since 1960,mean temperature increased in winter, spring and autumn, while temperature in summer decreased. The annual amplitude of temperature change decreased. In 1980s, air temperature decreased obviously, while it has creased rapidly since 1990s. （2） The changes of precipitation were not notable, but with a weak increasing tendency. Precipitation in spring and autumn decreased, but increased in winter and summer. Heavy rains occurred more frequently in the last few years, also severe drought happened re- cently. The relatively concentrated precipitation and increasing temperature would lead to more potential flood and drought disaster possibilities.
出处
《高原山地气象研究》
2008年第4期72-75,共4页
Plateau and Mountain Meteorology Research
关键词
达州
气候变化
气温
降水
Dazhou, climate change, temperature, precipitation
