基于分钟降水数据的山东滑动短时强降水时空分布特征
作者:
作者单位:

1.山东省气象防灾减灾重点实验室,山东 济南 250031 ;2.山东省气象台,山东 济南 250031 ;3.辽宁省气象服务中心,辽宁 沈阳 110000

作者简介:

第一作者:曹倩,工程师,1242847535@qq.com。
通信作者:杨成芳,正高级工程师,cf_yang70@hotmail.com。

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基金项目:

山东省自然科学基金项目(ZR2024QD262);山东省气象局面上项目(2023sdqxm02)


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Spatiotemporal distribution characteristics of sliding short-term heavyprecipitation in Shandong based on minute-resolution precipitation data
Author:
Affiliation:

1.Key Laboratory for Meteorological Disaster Prevention and Mitigation of Shangdong, Jinan 250031 , China ; 2.Shandong Meteorological Observatory, Jinan 250031 , China ; 3.Liaoning Meteorological Service Center, Shenyang 110000 , China

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    摘要:

    选用1972—2024年山东123个国家级气象观测站的分钟降水观测资料,分析山东4—10月滑动小时雨量极大值的空间分布特征及其与传统整点小时雨量极大值的差异,同时研究基于滑动小时雨量识别的不同强度(R≥20 mm、R≥50 mm)短时强降水事件的时空分布特征。结果表明:山东滑动小时雨量极大值在65.2~147.1 mm,其大值区主要位于鲁西北、鲁南和半岛的南部沿海地区,与整点小时雨量相比,滑动小时雨量对降水过程的强度和极大值刻画更为精确。济南、泰安、鲁西北和鲁南地区是短时强降水和50 mm短时强降水的高频区。山东短时强降水日变化总体呈双峰分布,但不同地区存在差异,其中鲁西北和鲁中地区呈单峰分布,峰值出现在傍晚前后;半岛地区呈双峰分布,主峰在凌晨,次峰在傍晚前后;而鲁南地区从午后到凌晨均易发生短时强降水。50 mm短时强降水日变化总体呈单峰分布,鲁西北、鲁中和半岛地区的日变化同短时强降水一致,鲁南地区日变化呈双峰分布。

    Abstract:

    The minute-resolution precipitation data of 123 national meteorological observing stations in Shandong from 1972 to 2024 are used to analyze the spatial distribution characteristics of the maximum sliding hourly precipitation in Shandong from April to October, and it is compared with the traditional maximum hourly precipitation at the top of the hour. The spatiotemporal distribution characteristics of short-term heavy precipitation events of different intensities (R≥20 mm, R≥50 mm) identified based on sliding hourly precipitation are discussed. The results are as follows. The maximum sliding hourly precipitation in Shandong ranges from 65.2 mm to 147.1 mm, with high-value areas mainly distributed in northwestern Shandong, southern Shandong and the southern coastal areas of the Shandong Peninsula. Compared with the hourly precipitation at the top of the hour, the sliding hourly precipitation is more accurate in characterizing the intensities and the maximum values of precipitation processes. Jinan, Tai’an, northwestern Shandong and southern Shandong are high-frequency areas for general short-term heavy precipitation and 50-mm short-term heavy precipitation. The diurnal variation of the general short-term heavy precipitation in Shandong generally presents a bimodal distribution, but there are differences among different regions. Northwestern Shandong and central Shandong show a unimodal distribution with the peak occurring around dusk; the Shandong Peninsula presents a bimodal distribution with the main peak occurring in the early morning and the secondary peak occurring around dusk; the short-term heavy precipitation is prone to occur in southern Shandong from afternoon until dawn. The diurnal variation of the 50-mm short-term heavy precipitation generally shows a unimodal distribution, where the diurnal variation patterns in northwestern Shandong, central Shandong and the Shandong Peninsula are consistent with those of the general short-term heavy precipitation, while the diurnal variation in southern Shandong exhibits a bimodal distribution.

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曹倩,杨成芳,侯淑梅,等.基于分钟降水数据的山东滑动短时强降水时空分布特征[J].海洋气象学报,2026,46(2):103-113.

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  • 收稿日期:2025-08-21
  • 最后修改日期:2025-11-11
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  • 在线发布日期: 2026-04-22
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