| 揭阳市低温的气候变化特征 |
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| 引用本文： | 梁洁华,陈浩,林巧美,黄文君,林锦冰.揭阳市低温的气候变化特征[J].广东气象,2020(2):27-30. |
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| 作者姓名： | 梁洁华 陈浩 林巧美 黄文君 林锦冰 |
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| 作者单位： | 揭阳市气象局;惠来县气象局 |
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| 基金项目： | 揭阳市气象局2017年课题(201703)。 |
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| 摘 要： | 选取了揭阳市4个市县1966-2015年50年国家站地面观测气温资料,采用线性回归、Mann-Kendall非参数检验和Morlet小波分析等方法,分析了揭阳市低温的气候变化特征,结果表明:50年来,揭西县低温日数最多,最主要影响时段在1月份。低温日数呈显著减少趋势;低温初日呈延后的趋势,低温终日则是提前的趋势。揭阳市区低温日数在1981年出现突变;揭阳市的低温期下降趋势不显著;揭阳市区低温日数在13年尺度上,平均周期约为8年,约经历了4个周期的从多到少的振荡,在2004年之后表现较平稳;在4年的尺度上,20世纪70年代之前经历了4个周期的从多到少的振荡,1978年之后振荡幅度变小,周期变化不明显。
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| 关 键 词： | 气候学 低温 气候变化 揭阳 |
Characteristics of Climatological Variation of Low Temperature in Jieyang City |
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| LIANG Jie-hua,CHEN Hao,LIN Qiao-mei,HUANG Wen-jun,LIN Jin-bing.Characteristics of Climatological Variation of Low Temperature in Jieyang City[J].Journal of Guangdong Meteorology,2020(2):27-30. |
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| Authors: | LIANG Jie-hua CHEN Hao LIN Qiao-mei HUANG Wen-jun LIN Jin-bing |
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| Institution: | (Meteorological Bureau of Jieyang City,Jieyang 522000;Meteorological Bureau of Huilai County,Huilai 515200) |
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| Abstract: | Using the surface temperature data from national observation stations from the four counties of Jieyang in the 50 years of 1966-2015 and with the methods of linear regression, Mann-Kendall non-parametric test and Morlet wavelet analysis, this work analyzes the climatological variation characteristics of low temperature in the city. The result is shown as follows. Over the 50 years, the Jiexi county had the most number of low-temperature days(LTD) and Januaries were the time with the most significant influence. The number of LTD showed a significantly decreasing trend;the first day of low temperature tended to delay while the last day tended to appear on an earlier date. In urban Jieyang, the number of LTD changed abruptly in 1981. Across the Jieyang city, low temperature fell insignificantly. On the 13-year scale, urban Jieyang’s number of LTD had an average period of about 8 years, experienced four periods of decreasing oscillations and performed smoothly after 2004. On the 4-year scale, it witnessed four periods of decreasing oscillations before the 1970 s but reduced in the amplitude of oscillation and varied with insignificant periods after 1978. |
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| Keywords: | climatology low temperature climate change Jieyang |
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