摘要
利用1951—2013年安徽省安庆市雷暴观测资料,分析安庆市近63年雷暴的气候变化趋势、初终日分布、突变和周期变化特征。结果表明,安徽省安庆市平均雷暴日数总体呈略下降趋势,夏、秋季雷暴日数下降趋势明显;雷暴有很强的季节性,集中出现在3—9月份,以7月份出现最多;雷暴初日普遍在2月下旬,终日普遍在8月下旬,雷暴初终日年际间差异大;雷暴日数1980年之前呈上升,之后呈下降的气候变化趋势;雷暴日数年际和年代际变化存在准2年、3~6年、5~10年以及准16年振荡周期。
With the data of thunder- storms in Anqing from 1951 to 2013, the climatological variation trends, ini- tial and ending dates, abrupt changes and periodicity features of thunderstorms during the recent 63 years were analyzed by means of climatic trends, assurance ratios, Mann-Kendall abrupt change test and Morlet wavelets analysis. The results showed that the interannual thunderstorm variability was great and the mean annu- al thunderstorm days declined, because of the reducing of thunderstorm days in summer an autumn. Most thunderstorms appearred ed from March to September, of which July reached the toppest. The initial thunderstorm dates occur in late Feburary while the curred in late August ending dates oe- Interannual thun- derstorm variability presents a trend of first increasing then decreased and the signifieant abrupt ehange occurred in 1980.The thunderstorm days showed quasi 2 years, 3-6 years and quasi 16 years oscillating periods for inter-annual and inter-deeadal variations.
出处
《农业灾害研究》
2017年第1期17-19,53,共4页
Journal of Agricultural Catastrophology
基金
公益性行业(气象)科研专项(GYHY201406021)
