黄冈地区≥0 ℃积温演变规律分析
Analysis on the Evolution Rule of ≥0 ℃ Accumulated Temperature in Huanggang Area
朱江 1张白云1
作者信息
- 1. 湖北省黄冈市气象局,湖北黄冈 438000
- 折叠
摘要
利用黄冈地区气象站1971-2010年日平均气温资料,采用Mann-Kendall检验、滑动t检验和Morlet小波分析等方法,分析了近40年黄冈地区≥0 ℃年积温时空分布和突变特征.结果表明:在空间分布上,黄冈地区日稳定通过0 ℃的初日、终日分布规律不同,初日由南向北推迟,终日由南向北提前;在时间分布上,黄冈地区日平均气温稳定通过0 ℃的初、终日有共同分布规律,黄冈市和黄冈地区北部、中南部随年代变化趋势一致,初日在各年代呈现一致的提前趋势,终日在各年代大致呈现推迟趋势,但20世纪80年代均比70年代略有提前.近40年黄冈地区≥0 ℃积温具有突变特征,1993年为突变年.黄冈地区≥0 ℃积温的变化在线性增、减的基础上叠加了不同周期的波动变化.近40年来≥0 ℃积温变化存在27年和22年2个尺度振荡周期信号,其中以27年的尺度趋势较强,周期相对比较显著,22年的尺度周期性较弱.
Abstract
Using the daily average temperature data of the Huanggang area during 1971-2010, the Mann-Kendall test, the sliding t test and the Morlet wavelet analysis were used to analyze the spatiotemporal distribution and mutation characteristics of ≥0 ℃ annual accumulated temperature in Huanggang area in recent 40 years.The results showed that in the spatial distribution, the distribution rule of first-day and last-day of day average temperature stabilized by 0 ℃ in Huanggang area was different.The first-day postponed from south to north,the last-day advanced from south to north.In the time distribution,the first-day and last-day of day average temperature stabilized by 0 ℃ in Huanggang area had a common law of distribution,the change trend of Huanggang City and Huanggang area in the north and south-central was consistent,the first-days in each age was consistent trend ahead;the last-day generally showed a delay trend, but that of 1980s was slightly ahead of 1970s.≥ 0 ℃ accumulated temperature in Huanggang area in nearly 40 years had a mutation characteristics, 1993 was the mutation year.The change of ≥0 ℃ accumulated temperature in Huanggang area was superimposed on the fluctuation of different cycles on the basis of linear increase and decrease.There were two scales of oscillation period signal in the past 40 years, and there was a strong trend in the 27-year scale, the period was relatively significant, and the 22-year scale was weaker.
关键词
≥0℃积温/变化规律/Mann-Kendall检验/小波分析/黄冈地区Key words
≥0 ℃ accumulated temperature/Change rule/Mann-Kendall test/Wavelet analysis/Huanggang area引用本文复制引用
出版年
2017
国家科技期刊平台
NSTL
万方数据