ZHANG Zhigao,ZHANG Kaizhao,CAI Maotang,et al.Spatiotemporal Variation Characteristics of Precipitation Structure in Henan Province During 1960—2019[J].Research of Soil and Water Conservation,2022,29(04):159-166.
1960—2019年河南省降水结构时空变化特征
- Title:
- Spatiotemporal Variation Characteristics of Precipitation Structure in Henan Province During 1960—2019
- 文章编号:
- 1005-3409(2022)04-0159-08
- 分类号:
- P426
- 文献标志码:
- A
- 摘要:
- 为了研究河南省降水结构变化特征,基于1960—2019年河南省17个气象站点逐日降水数据,运用数理统计、GIS及Mann-Kendall等方法对河南省不同降水历时和降水等级时空变化特征及其变化趋势进行了分析。结果表明:(1)河南省降水发生率随降水历时的增加呈减少趋势,短历时(1～2 d)降水发生率达74.03%,居主导地位。≥5 d降水贡献率最大(26.73%),其次为2 d(26.20%),3 d(18.68%),4 d(14.43%)和1 d(13.96%); 降水发生率随降水等级增加而降低,各等级降水贡献率为23.36%～28.20%,分布较为均衡;(2)降水结构空间差异显著,短历时降水发生率和贡献率呈由南往北逐渐增加趋势,3 d以上历时降水由南向北减少; 小雨发生率和贡献率由东南向西北递增,暴雨发生率和贡献率由东南向西北递减;(3)Mann-Kendall趋势分析表明,各历时降水发生率和贡献率变化趋势基本一致,表现为中短历时(1～3 d)降水上升,长历时降水下降; 各等级降水变化趋势方面,小雨发生率、贡献率呈下降趋势,大雨、暴雨发生率和贡献率呈上升趋势。近60 a来河南省降水结构有向极端强降水转移的态势。
- Abstract:
- In order to explore the variation characteristics of precipitation structure in Henan Province, based on the daily precipitation data of 17 meteorological stations in Henan Province from 1960 to 2019, the spatial and temporal variation characteristics and its variation trends of different precipitation duration and precipitation grade in Henan were analyzed by using mathematical statistics, GIS and Mann-Kendall methods. The results show that:(1)the precipitation incidence rate decreased with the increase of precipitation duration, the occurrence rate of short precipitation duration(1～2 d)was 74.03%, which was dominant; the contribution rate of ≥5 d precipitation duration was the largest(26.73%), followed by 2 d(26.20%), 3 d(18.68%), 4 d(14.43%)and 1 d(13.96%); the precipitation incidence rate decreased with the increase of precipitation grade; the contribution rate of different precipitation grade was between 23.36% and 28.20%, showing a balanced distribution, and the contribution rate of precipitation grade was relatively balanced relative to the precipitation incidence rate;(2)the spatial difference of precipitation structure was significant; the incidence rate and contribution rate of short and medium precipitation duration(1～3 d)gradually increased from south to north, and the precipitation over 3 days decreased from south to north; the incidence rate and contribution rate of light rain increased from southeast to northwest, and the incidence rate and contribution rate of rainstorm decreased from southeast to northwest;(3)Mann Kendall trend analysis showed that the change trends were similar between incidence rate and contribution rate for precipitation durations, showing that the incidence rate of shorter precipitation duration increased, while the rate of longer precipitation duration decreased; in terms of the change trend of precipitation grade, the incidence rate and contribution rate of light rain showed a downward trend, while the incidence rate and contribution rate of heavy rain and rainstorm showed an upward trend. In recent 60 years, the precipitation structure of Henan had a trend of transferring to extreme heavy precipitation.
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相似文献/References:
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备注/Memo
收稿日期:2021-03-07 修回日期:2021-07-14
资助项目:河南省高等学校青年骨干教师项目(2020GGJS188); 河南省科技攻关项目(222102320364); 国家自然科学基金(41602366); 2021年度河南省教育厅人文社会科学研究一般项目(2021-ZDJH-016); 安阳师范学院大学生创新创业训练计划项目(202110479132)
第一作者:张志高(1986—),男,河南许昌人,博士,副教授,主要从事气候变化研究。E-mail:Zhangzhg06@163.com
通信作者:蔡茂堂(1981—),男,山东淄博人,博士,助理研究员,主要从事气候变化研究。E-mail:Caimaotang@126.com