2017年8月赤峰初霜冻天气分析及对农业的影响  

Analysis of Early Frost Weather and Its Impact on Agriculture in Chifeng in August 2017

作　　者：晋亮亮 Jin Liangliang(Chifeng Meteorological Bureau,Chifeng 024000,Inner Mongolia Autonomous Region,China)

机构地区：[1]赤峰市气象局,内蒙古自治区赤峰024000

出　　处：《农业技术与装备》2022年第2期129-130,共2页Agricultural Technology & Equipment

摘　　要：文章利用常规高空、地面观测资料及自动站气象资料对2017年8月29日—30日赤峰市出现的初霜冻天气过程进行了分析。结果表明,本次初霜冻天气是典型高空槽后偏北气流型。2017年8月28日20时高空700 hPa形势为东亚大陆中高纬度呈现一槽一脊型,赤峰市处于冷涡底后部、高空锋区北侧的偏北气流里,关键区内45~50°N,110~120°E,等温线和等高线交角较大、形成了较强的冷平流,有利于高纬度冷空气向赤峰市输送,是造成本次霜冻天气主要原因,晴空辐射降温以及特殊的东低西高地形也是本次霜冻天气重要因素。Based on the conventional high-altitude and ground observation data and the meteorological data of automatic station,this paper analyzes the initial frost weather process from August 29 to 30,2017 in Chifeng City.The results show that the first frost weather is a typical north air flow behind the high trough.At 20:00 on August 28,2017,the high altitude 700 hPa situation showed a trough and ridge pattern in the middle and high latitudes of the East Asian continent.Chifeng City was in the northerly air flow behind the cold vortex bottom and north of the high altitude front area.In the key area,45 ~ 50° N and 110 ~ 120° E,the intersection angle of isotherm and contour line was large,forming a strong cold advection,which was conducive to the transmission of cold air in high latitudes to Chifeng City,which was the main reason for the frost weather,The clear sky radiation cooling and the special terrain of low in the east and high in the west are also important factors in this frost weather.

关 键 词：霜冻 冷平流 地形 

分 类 号：S425[农业科学—植物保护]