长江安徽段两岸邻近两地汛期降水对比分析  

Comparative Analysis of Precipitation in Flood Season Between Adjacent Areas on Both Sides of Anhui Section of Yangtze River

作　　者：凌林 LING Lin(Zongyang Meteorological Bureau,Zongyang 246700,China)

机构地区：[1]枞阳县气象局,安徽枞阳246700

出　　处：《河南科技》2025年第4期92-97,共6页Henan Science and Technology

摘　　要：【目的】长江流域地形复杂多样,降水因地形、流域的不同各有差异。研究长江安徽段两岸邻近两地庐江和铜陵汛期降水差异,为进一步认识长江流域的降水规律提供参考。【方法】运用统计分析法得出两地累计降水量、累计降水频次和平均小时降水强度等3个要素精细化的变化特征。【结果】庐江站和铜陵站汛期降水逐年演变趋势类似,庐江站降水强度总体小于铜陵站,降水频次两站接近,累计降水总量庐江站比铜陵站偏少9%。3个要素日变化幅度庐江站均小于铜陵站,两站白天降水均大于夜间,两站累计降水量和频次日变化都呈现双峰特征,铜陵站双峰特征强于庐江站,庐江站峰值分别出现在上午和下午,铜陵站峰值分别出现在清晨和傍晚。共有降水事件日变化两站3个要素特征与总降水事件类似,两站近10年汛期降水基本来源于同一降水系统。【结论】黄梅尖山脉和长江对汛期来自孟加拉湾的西南水汽和来自南海及西太平洋的东南水汽输送起到衰减和延缓作用。[Purposes]The topography of the Yangtze River basin is complex and diverse,and the precipi⁃tation varies according to the different topography and basins.In order to further understand the precipita⁃tion regularity of the Yangtze River Basin,it is necessary to study the differences in flood season precipi⁃tation between Lujiang and Tongling on both sides of the Anhui section of the Yangtze River.[Methods]Statistical analysis was used to obtain the fine variation characteristics of three factors:cumulative pre⁃cipitation,cumulative precipitation frequency,and average hourly precipitation intensity.[Findings]The annual evolution trend of precipitation in flood season was similar between the two stations.The precipita⁃tion intensity of Lujiang Station was lower than that of Tongling Station,the frequency of precipitation was close to that of Tongling Station,and the total accumulated precipitation of Lujiang Station was 9%less than that of Tongling Station.The amplitude of diurnal variation amplitude of the three elements at Lujiang Station is smaller than that at Tongling Station,and the precipitation at the two stations during the day is greater than that at night.The diurnal variation of accumulated precipitation and frequency at the two stations presents double-peak characteristics,and the double-peak characteristics at Tongling Station are stronger than that at Lujiang Station,and the peaks at Lujiang Station appear in the morning and afternoon respectively,while the peaks at Tongling station appear in the early morning and evening respectively.In jointly precipitation events the characteristics of the three elements of the two stations are similar to the total precipitation events,which in recent ten years primarily originate from the same precipitation system.[Conclusions]The Huangmei Mountains between Lujiang and Tongling and the Yangtze River can attenuate and delay the southwest water vapor transport from the Bay of Bengal and the southeast water vapor transport from the South China Sea and the W

关 键 词：长江 庐江 铜陵 汛期降水 对比分析 日变化 

分 类 号：P426.623[天文地球—大气科学及气象学]