扎龙湿地近58年气温、降水变化特征研究

根据齐齐哈尔市1951-2008年气象观测数据,利用统计分析方法分析了58年来扎龙湿地气温和降水的变化情况。分析结果表明：年平均气温变化呈上升趋势,年降水量变化呈波动趋势,存在2～3年、6～7年变化周期。气温的季节变化呈不同程度的上升趋势,降水的季节变化呈不同程度的波动趋势;年均气温的代际变化较为和缓,呈小幅上升趋势,...

Changes of air temperature and precipitation in recent 58 years in Zhalong Wetland

The changes of air temperature and precipitation were analyzed by using statistical analysis method based on the observed meteorological data from 1951 to 2008 in Zhalong wetland.The results indicated that the trend of annual mean air temperature was upward and the trend of annual precipitation was fluctuated.The results also showed that there were precipitation cycles of 2～3 years and 6～7 years in the area.The trends of four seasonal air temperatures were increasing at different degrees and the trends of four seasonal precipitations were changing in fluctuation at indifferent degrees;Decadal variations of annual mean air temperature were upward at small extent,the decadal variations of seasonal mean air temperature were increasing obviously after 70's but the change was not significant before 70's.Decadal variations of annual precipitation and summer precipitation were more significant than other seasons;The abrupt change of air temperature occurred in 1987 but the abrupt change of precipitation didn't occur.