2023年12月旅顺连续降雪过程分析  

Analysis of Continuous Snowfall Process in Lvshun in December 2023

作　　者：刘志宏[1] 陈晓斌[1] 

机构地区：[1]中国人民解放军92538部队,辽宁 大连

出　　处：《自然科学》2025年第2期243-252,共10页Open Journal of Nature Science

摘　　要：本文对2023年12月旅顺出现的连续10天强降雪天气事件进行回顾,运用多个站点观测资料、ERA5的位势高度场、海表温度场、中央气象台的天气形势图与近10年12月连续降雪事件加以对比总结,结果表明:2023年12月平均的冷涡强度最强(中心强度为5080位势米),强大的冷涡以及极为偏东的高空冷空气堆积是此次连续降雪事件的主要系统;渤海海峡的等温线分布有一个明显的向渤海以北延伸的暖舌(5.2℃~7.6℃之间),平均海气温差在9.4℃,这样冷空气在经过上游暖舌区域增温增湿后可给辽东半岛带来冷流降雪;此次连续降雪既有系统性降雪,又有冷流性降雪,其中冷流降雪(旅顺地区风速小),850 hpa或700 hpa分别处在涡后或槽后脊前,系统性降雪,500 hpa、700 hpa我区均处于高空槽前,850 hpa处于槽后脊前;冷流降雪前及过程中,辽东半岛北部中低空都出现了明显的垂直运动、水汽输送、水汽辐合,700 hpa相较850 hpa更为明显。In this paper, the 10 consecutive days of heavy snowfall in Lvshun in December 2023 was reviewed, and the observation data of several stations, the geopotential height field of ERA5, the sea surface temperature field, and the weather situation chart of the National Meteorological Center of CMA were compared with the continuous snowfall events in December in recent 10 years. The results show that: In December 2023, the average intensity of the cold vortex is the strongest (the central intensity is 5080 geopotential meters), and the strong cold vortex and the accumulation of high altitude cold air very far to the east are the main systems of this continuous snowfall event. The isothermal distribution of the strait has an obvious warm tongue (between 5.2˚C~7.6˚C) extending to the north of the Bohai Sea, the average temperature difference between the sea and the air is 9.4˚C, so that the cold air can bring cold flow snow to the Liaodong Peninsula after warming and humidification in the upst

关 键 词：冷流性降雪 高空冷涡 位势高度 海表温度 

分 类 号：P426.63[天文地球—大气科学及气象学]