葫芦岛“8·20”特大暴雨过程成因及地形作用探究

doi:10.3969/j.issn.1673-503X.2025.04.001

Abstract

Abstract: This study investigates the causes of the extreme rainstorm in Huludao,Liaoning Province during 19-20 August 2024 and the role of terrain,utilizing dense precipitation observations and ERA5 reanalysis data.Results show that the "east-high-west-low" circulation pattern formed by the Northeast Cold Vortex and the western Pacific subtropical high facilitated moisture transport via southerly flows along the subtropical high's western flank.The convergence between cold air from the vortex and warm-moist air from the subtropical high promoted Frontogenesis over western Liaoning.Terrain-front interactions intensified precipitation,as terrain-blocked flows in the western/northern frontal zone enhanced vertical motion.This uplift further amplified Frontogenesis through its effect on Tilted Items in the frontogenetic function,constituting a key dynamic mechanism.During peak rainfall,maximum precipitation occurred in a horn-shaped mountainous area where east/southeast flow over terrain converged with northeastward ascending flows,triggering mesoscale convective systems.The southward flow over slopes generated localized convergence through flow separation-reunion mechanisms,providing additional dynamic forcing.Prolonged frontal zone stagnation caused by orographically-induced ascent contributed to the event's exceptional duration.

Key words: Terrain, Flow over, Frontogenesis, Tilted items, Precipitation

CLC Number:

P426

LIU Chenghan, JIAO Haoran, ZHANG Aizhong, YAN Qi, LIU Shuo, DU Jiayi, SUN Yibo. Causes of the “8·20” extraordinary rainstorm in Huludao and exploration of topographic effects[J]. Journal of Meteorology and Environment, 2025, 41(4): 1-9.

References

[1] 罗亚丽,孙继松,李英,等.中国暴雨的科学与预报:改革开放40年研究成果[J].气象学报,2020,78(3):419-450.
[2] 黄丽君,崔晓鹏.2000—2019年东北冷涡统计特征及其影响期间的降水分布[J].大气科学,2023,47(6):1925-1938.
[3] 王宁,徐祥德,徐洪雄,等.一次东北冷涡暴雨的水汽输送特征和位涡分析[J].地理科学,2014,34(2):211-219.
[4] 任丽,杨艳敏,金磊,等.一次东北冷涡暴雨数值模拟及动力诊断分析[J].气象与环境学报,2014,30(4):19-25.
[5] 李玥瑶,崔晓鹏,李国平,等.2021年6月东北冷涡暴雨降水物理过程观测与模拟研究[J].大气科学,2024,48(4):1640-1656.
[6] 郑婧,许彬,许爱华.远距离台风“康森”与高空西北气流共同作用对大暴雨的影响[J].暴雨灾害,2017,36(4):329-338.
[7] 梁军,陈联寿,李英,等.影响辽东半岛的热带气旋降水分析[J].热带气象学报,2006,(1):41-48.
[8] 吴国雄,丑纪范,刘屹岷,等.副热带高压研究进展及展望[J].大气科学,2003,(4):503-517.
[9] 赵凯,张银意,陈小宇,等.一次暴雨过程的锋生特征及风场演变分析[J].气象科学,2024,44(5):881-889.
[10] 刘裕禄,黄勇.黄山山脉地形对暴雨降水增幅条件研究[J].高原气象,2013,32(2):2608-2615.
[11] 陈联寿,孟智勇.我国热带气旋研究十年进展[J].大气科学,2001,25(3):420-432.
[12] 阎琦.2023年6月1日辽宁龙卷过程多尺度特征及成因分析[J].气象与环境学报,2024,40(3):1-8.
[13] 王凯,齐铎,高丽,等.浙东地形对台风“利奇马”极端降水的影响分析[J].气象科学,2021,41(2):162-171.
[14] 付双喜,张洪芬,杨丽杰,等.地形影响下祁连山北麓不同类型降水特征对比分析[J].干旱区研究,2021,38(5):1226-1234.
[15] 杜正静,何玉龙,熊方,等.滇黔准静止锋诱发贵州春季暴雨的锋生机制分析[J].高原气象,2015,34(2):357-367.
[16] Buzzi A,Tibaldi S.Cyclogenesis in the lee of the Alps:A case study.Quarterly Journal of the Royal Meteorological Society,1978,104(439):271-287.
[17] 尹东屏,张备,孙燕,等.2003年和2006年梅汛期暴雨的梅雨锋特征分析[J].气象,2010,36(6):1-6.
[18] 王建捷,陶诗言.1998梅雨锋的结构特征及形成与维持[J].应用气象学报,2002,(5):526-534,641-642.
[19] 冯文,吴冰雪,杨薇.海南岛秋汛期特大暴雨局地锋生的特征及其对对流系统发展的影响[J].大气科学学报,2023,46(2):271-282.
[20] 孙淑清,杜长萱.梅雨锋的维持与其上扰动的发展特征[J].应用气象学报,1996,(2):153-159.
[21] 段旭,段玮,张亚男,等.利用锋生函数对2008年年初昆明准静止锋生消过程的诊断分析[J].大气科学,2019,43(2):325-338.
[22] 金小霞,刘梅,李杨,等.江淮梅雨期不同类型暴雨过程锋生特征分析[J].大气科学学报,2023,46(4):600-614.
[23] 刘裕禄,杜其成,黄勇.黄山地区短时强降雨的地形增幅机制[J].气象,2017,43(2):181-188.
[24] Zhao Y,Deng L,Li Z,et al.Quantitative attribution of vertical motion responsible for summer heavy rainfall over North China[J].Journal of Geophysical Research:Atmospheres,2022,127(2):035765.
[25] 常姝婷,苏亚乔,汪兵,等.2021年辽宁西部两次暴雨过程典型特征对比[J].沙漠与绿洲气象,2024,18(2):52-60.
[26] 丁一汇.天气动力学中的诊断分析方法[M].北京:科学出版社,1989:87-88.
[27] 张耀存,钱永甫.青藏高原隆升作用于大气临界高度的数值研究[J].气象学报,1999,57(2):30-40.

Causes of the “8·20” extraordinary rainstorm in Huludao and exploration of topographic effects

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Metrics

Comments

Recommended 10

[1]	XIAO Guangliang, CAI Kuizhi, WANG Ying, JI Yongming, LIU Jingnan, CHENG Pan, ZHU Xianlong, JI Ximeng. Application assessment of merged precipitation data during the “8·20” torrential rainstorm in Huludao [J]. Journal of Meteorology and Environment, 2025, 41(4): 10-20.
[2]	SU Yumeng, ZHAI Qingfei, SHAN Weiwei, LUAN Yongming, REN Chuan, WANG Weiqi, PANG Zihao, LIU Jingnan. Applicability evaluation of multi-source fusion real-time interpolation station data in the “8·20” extraordinary precipitation process in Huludao [J]. Journal of Meteorology and Environment, 2025, 41(4): 21-27.
[3]	LIANG Yu, HU Yanping, ZHANG Pu, ZHANG Yachun. Cause analysis of a southwesterly airflow warm-sector heavy rainfall event in Henan [J]. Journal of Meteorology and Environment, 2025, 41(4): 48-57.
[4]	WANG Han, LI Lan, TENG Fangda, TAN Zhenghua, ZHANG Mengmeng, LIN Zhongguan. Characteristics of environmental fields and asymmetric precipitation at different stages of typhoon Khanun intensification [J]. Journal of Meteorology and Environment, 2025, 41(4): 68-78.
[5]	WANG Ziqi, XU Yejia, WANG Fang, YE Yanting, GONG Junqiang. Precipitation prediction during the Meiyu period over central Zhejiang Province based on the interannual increment method [J]. Journal of Meteorology and Environment, 2025, 41(4): 110-116.
[6]	YAO Xiaojuan, SUN Xin, ZHU Feng, LIU Linchun, JI Yanxia, LIU Ke, SUN Zhezhong. Analysis on wind field forecast performance under complex terrains of the Sub-hundred-meter Numerical Forecast System of Inner Mongolia [J]. Journal of Meteorology and Environment, 2025, 41(3): 52-60.
[7]	SUN Xin, LIU Hongjun, WANG Guoliang. A case study on the heavy precipitation caused by a quasi-stationary mesoscale convective system [J]. Journal of Meteorology and Environment, 2025, 41(3): 68-75.
[8]	CHU Meng, WU Wei. Accuracy assessment of FY-4A and FY-4B Quantitative Precipitation Estimation in Sichuan [J]. Journal of Meteorology and Environment, 2025, 41(3): 76-84.
[9]	QU Meihui, TU Gang, LIU Changzheng, LI Shangfeng, LI Yupeng, LU Zengxin, REN Hang, ZHAO Shuhong. Evaluation of MODES data products for summer precipitation forecasts in Northeast China during 1982-2022 [J]. Journal of Meteorology and Environment, 2025, 41(2): 11-19.
[10]	YAO Kai, ZHU Xiaotong, CHEN Changsheng, QIN Yulin, ZHOU Dongxue, PIAO Meihua. Spatial verification of CMA models on precipitation forecast for typhoon “Meihua” in Northeast China [J]. Journal of Meteorology and Environment, 2025, 41(1): 35-42.
[11]	FAN Qianying, XU Juanjuan, ZHENG Xiaohua, LIU Huan. Spatial and temporal distribution of extreme precipitation and index of heavy rain flood disaster in Shaanxi province [J]. Journal of Meteorology and Environment, 2025, 41(1): 43-49.
[12]	Qiang ZHAO, Ruifang LIU, Bei JIA, Liwei QU. Causes of a heavy snowfall in central-southern Loess Plateau in 2020 and its lower-level cooling mechanisms of rain-to-snow transition [J]. Journal of Meteorology and Environment, 2024, 40(6): 10-18.
[13]	Xukai ZOU, Xianyan CHEN, Shanshan ZHAO, Yu CHEN, Hongling ZENG, Qiang ZHANG. Precipitation variation characteristics in the Three Gorges Region of the Yangtze River from 1961 to 2020 [J]. Journal of Meteorology and Environment, 2024, 40(6): 44-52.
[14]	Qian LI, Yitong LIN, Xiaoyu ZHOU, Yihe FANG. Analysis of the spatiotemporal variation in the comprehensive intensity of regional heavy rainfall events in Liaoning province from 1961 to 2021 [J]. Journal of Meteorology and Environment, 2024, 40(6): 53-61.
[15]	Bingbing ZHANG,Xiao LV,Lili GAO,Quan GAO,Hang WU,Tao LIANG,Yuchao LU,Fangmin ZHANG,Fu CAI. Research on characteristics of soil moisture recession and the development of predictive models for corn fields in western Liaoning province [J]. Journal of Meteorology and Environment, 2024, 40(6): 62-69.