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气象研究与应用[ISSN:1673-8411/CN:45-1356/P]

卷:

第36卷

期数:

2015年04期

页码:

76-79

栏目:

天气气候

出版日期:

2015-12-23

文章信息/Info

Title:

Analysis on the first low-temperature frost process of Meixian in the winter of 2014

作者:

刘蕾¹;  彭量²;  刘静¹;  吴文婷¹

1. 梅县区气象局, 广东梅县 514700;
2. 梅州市气象局, 广东梅州 514021

Author(s):

LiuLei¹;  PengLiang²;  LiuJing¹;  WuWenting¹

1. Meixian Meteorological Service, Meixian 514700, China;
2. Meizhou Municipal Meteorological Service, Meizhou 514021, China

关键词:

低温; 平流; 辐射; 天气形势; 数值预报

Keywords:

low temperature; advection; radiation; weather situation; numerical Prediction

分类号:

p457.31

摘要:

从日常预报的角度出发,结合常规观测资料和数值预报产品对2014年12月18日梅县出现了14年入冬以来的首次低温霜冻天气进行分析得出:低温天气的出现和冷空气的入侵有关外,还与夜间晴空辐射降温、周边地理环境等因素有关。在冷空气前梅县有短暂回暖现象;冷空气过后,导致基础气温较低,在高空西北气流和地面冷高脊控制下,极易发生辐射类低温;数值预报对冷空气的形势预报准确,有较高的参考意义,但其温度预报往往只考虑平流降温作用,对于辐射类降温的预报能力较差。

Abstract:

Based on conventional observation data and numerical forecast products, the first low-temperature frost process of Meixian on December 18th, 2014 was analyzed from the perspective of daily forecasts. The results show that:cold air intrusion, clear sky radiation cooling at night and the geographical environment cause the low-temperature weather. There was sort-time warming phenomenon before the cold air intrusion. After the cold air, the base temperature usually is quite low, and under the control of high altitude cold northwest flow and ground high ridge, it is likely to appear radiation cooling. The numerical forecast for cold air situation is accurate and has a higher reference value, but it is just considers the advection cooling effect and performs badly in the radiation cooling.

备注/Memo

备注/Memo:

收稿日期:2015-05-16。
作者简介:刘蕾(1984-),女,工程师,学士学位,主要从事天气预报工作。

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