摘要
利用长春测站地面气温资料、850 hPa高度场温度资料,分析了长春地面平均气温、最低气温和850 hPa高度上温度的变化。结果表明,冬季变暖的主要特征为最低气温变暖最明显,冬季最低气温的升温趋势明显高于年平均气温和冬季平均气温,在冬季的3个月中2月份的增温趋势最明显;在近10年中,趋势倾向达到最大值。通过相关计算,冬季最低气温与冬季平均气温的相关系数达到0.928;随年代增加低温日数明显减少,与冷冬、暖冬有较好的一致性,而冬季平均气温的升温趋势不如年平均气温明显,表明其他季节的贡献也比较高。长春市的增温明显高于全国平均水平;长春冬季平均气温对年平均气温的方差贡献率达到14%。850 hPa高度上冬季平均温度及年平均气温均呈现升温趋势,50年来冬季升温趋势是0.19℃/10年,年平均气温升温趋势是0.48℃/10年,可见冬季平均气温和年平均气温都呈现升温趋势,冬季升温趋势没有年平均气温升温明显;分析了850hPa高度上冬季平均气温与地面冬季平均气温相关显著,表明地面和对流层低层同时变暖。
By using surface temperature data and 850 hPa height field temperature data of Changchun Station, the changes in Changehun of the surface temperature, the minimum temperature（MT） and the temperature on 850 hPa height were analyzed. The results showed that the main features of warming winter in MT was becoming warmer, the winter warming trend in MT was significantly higher than the annual average temperature（AAT） and average temperature in winter（ATW） ; the warming trend of the three months in winter in February was the most obvious in the past 10 years. The trends tended to achieve the maximum. Through the relevant calculating, it was seen that the winter MT and ATW reached the correlation coefficient of 0.928 ; As the age increased ,the performance of the number of days for the low - temperature signifieandy reduced, which had a well consistency with cold winter and warm winter. While in winter the warming trend of the average temperature was not such obvious as the AAT, which showed that the contribution of the other seasons was also high. Changchun City was significantly higher than the national average warming level ; For Changehun, the variance contribution of the ATW to the AAT reach 14%. 850 hPa height on the ATW and AAT also showed wanning trends. Over the past 50 years, the wanning trend in winter was 0.19 ℃ / 10 a and wanning trend in AAT was 0.48 ℃/10 a, which showed the warming trends of the ATW and AAT. But the winter warming trend in AAT was not warming significantly. The significant relation between the ATW of 850 hPa height and that on the ground indicated that the ground and the lower of tropospheric became warm at the same time.
出处
《安徽农业科学》
CAS
北大核心
2009年第29期14234-14236,14281,共4页
Journal of Anhui Agricultural Sciences
关键词
气温变化
冬季
长春
特征
Temperature change
Winter
Changehun
Features
