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驻马店秋季连阴雨统计与2017年秋季连阴雨实例分析
王静,靳婷
0
(驻马店市气象局  河南  驻马店 463000)
摘要:
秋季连阴雨是驻马店市较为常见的一种灾害性天气,统计发现驻马店市9-10月连阴雨年均出现1.5次,连续7天及以上连阴雨年均0.69次;10天及以上连阴雨0.26次;15天及以上为20年一遇。我们用39年来最严重的一次连阴雨为实例分析连阴雨的天气特征及影响。驻马店市于2017年8月28日-10月18日,特别是9月23日--10月18日出现了自1961年以来最严重的连阴雨天气,其降雨日数之多、累计雨量之大,日照时数之少均突破历史极值。本次连阴雨天气自8月底开始,由于此时秋作物正处于灌浆中后期,对作物最终产量有一定的不利影响。此外,连阴雨天气还增加了机收难度并降低作物品质,并导致田间过湿或渍涝,整地困难增加,小麦播种期向后推迟严重。本次连阴雨天气是由于强盛的乌拉尔山阻塞高压和偏强的副热带高压的共同影响,副高西北部边缘的西南气流携带来自孟加拉湾的暖湿气流,与阻高东北侧南下的低层冷空气相互叠加形成了严重的连阴雨天气。本文对此次严重连阴雨的分析为今后的预报和服务提供一定的借鉴意义。
关键词:  秋季 连阴雨 阻塞高压 暖湿气流 冷空气
DOI:
投稿时间:2021-03-27修订日期:2021-03-27
基金项目:
Statistical Analysis of Autumn Continuous Rain in Zhumadian and Analysis of Continuous Autumn Rain  In 2017
()
Abstract:
Continuous Autumn Rain is a usual weather disaster in Zhumadian . Statistics show that from 1980 to 2018, Continuous Autumn Rain in Zhumadian occurred average frequency is 1.5 times annually from September to October, and continuous rainy days for 7 consecutive days and above averaged 0.69 times per year; Continuous Autumn Rain for 10 days and above 0.26 times; 15 days and above is a 20-year encounter. We use the worst Continuous Autumn Rain in 39 years as an example to Analysis of the weather characteristics and impact of Autumn Continuous Rain .The most severe rain from August 28 to October 18 in 2017, especially September 23 to October 18, had happended in Zhumadian since 1961, with the number of rain days, the amount of accumulated rainfall, and the sunshine hours breaking the historical extremes. The continuous rain started at the end of August and that time is in the middle and late stages of autumn crops grouting, which had a certain negative impact on the production. In addition, the rainy weather had increased the difficulty of harvesting and reducing the quality of crops. Besides, due to excessive humidity or soiling in the fields, land preparation was so hard that wheat planting had been seriously delayed. The continuous rain was caused by the Ural Mountains blocking high and the subtropical high, which is stronger than the normal years. The southwestern wind at the northwestern edge of the subtropical high brought warm and moist air from the Bay of Bengal, overlapping with the south low-level cold air from northeast of the blocking high, which lead to the severe rainy weather. The article analyzed and summarized this severe continuous rain and provided useful experience for future forecast and services.
Key words:  autumn, continuous rain, blocked high, warm moist air, cold air

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