| 江苏省冰粒过程的天气特征和预报着眼点探讨 |
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| 引用本文： | 马晨晨,韩桂荣,黄文彦,史达伟,马乐.江苏省冰粒过程的天气特征和预报着眼点探讨[J].气象科学,2020,40(2):270-277. |
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| 作者姓名： | 马晨晨 韩桂荣 黄文彦 史达伟 马乐 |
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| 作者单位： | 连云港市气象局, 江苏 连云港, 222006;江苏省气象局, 南京 210000;常州市气象局, 江苏 常州 213000;连云区气象局, 江苏 连云港 222042 |
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| 基金项目： | 江苏省气象局预报员专项（JSYBY201812）；江苏省气象局青年基金（KQ201802） |
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| 摘 要： | 利用常规气象观测资料、微波辐射计资料和FNL再分析资料对2016年3月8日和2015年2月27日江苏省两次冰粒过程进行了对比分析,研究结果表明:(1)两次过程均是在后倾槽系统和东路冷空气的影响下产生的,环流形势为冰粒的产生提供了有利的大尺度条件;(2)在临近冰粒形成前,融化层和冻结层形成,而干层的形成时间要明显早于融化层和冻结层;(3)偏北的冷气流与偏南的暖气流随时间和空间分布不同导致温度平流分布不同,进而导致融化层和冻结层产生;(4)干层的形成主要是由于湿度平流随高度的分布差异造成的,水滴在干层中的蒸发吸热作用促进冻结层产生和维持。
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| 关 键 词： | 冰粒 冻结层 融化层 干层 |
| 收稿时间： | 2018/5/7 0:00:00 |
| 修稿时间： | 2019/1/18 0:00:00 |
Features and forecast points of ice pellet weather process in Jiangsu Province |
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| MA Chenchen,HAN Guirong,HUANG Wenyan,SHI Dawei,MA Le.Features and forecast points of ice pellet weather process in Jiangsu Province[J].Scientia Meteorologica Sinica,2020,40(2):270-277. |
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| Authors: | MA Chenchen HAN Guirong HUANG Wenyan SHI Dawei MA Le |
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| Institution: | Lianyungang Meteorological Bureau, Lianyungang 222008, China;Jiangsu Meteorological Bureau, Jiangsu Nanjing 210000, China;Changzhou Meteorological Bureau, Jiangsu Changzhou 213000, China; Lianyun District Meteorological Bureau, Jiangsu Lianyungang, 222042, China |
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| Abstract: | Based on conventional observations, microwave radiometer data and FNL data, two ice pellet weather processes on March 8, 2016 and February 27, 2015 were analyzed. Results show that the two processes happened under the influence of backward trough and easterly cold air, and the circulation features provide favorable large-scale conditions for the generation of ice pellets. The frozen layer and thawed layer form just before the formation of the pellets, while the formation of dry layer is much earlier. The northern cold flow and the southern warm flow result in different distributions of temperature advection as the temporal and spatial distributions, leading to the formation of the frozen layer and thawed layer. The formation of dry layer mainly attributes to inhomogeneous distribution of humidity advection along height. Evaporation in dry layer facilitates the formation and maintenance of the dry layer. |
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| Keywords: | ice pellets frozen layer melting layer dry layer |
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