[1]朱秋宇,何慧,周秀华,等.广西持续性低温雨雪冰冻过程特征和气候成因分析[J].气象研究与应用,2019,40(01):38-41.
 Zhu Qiuyu,He Hui,Zhou Xiuhua,et al.Analysis on the characteristics and climatic causes of the persistent low temperature and snow freezing process in Guangxi[J].Journal of Meteorological Research and Application,2019,40(01):38-41.
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广西持续性低温雨雪冰冻过程特征和气候成因分析()
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气象研究与应用[ISSN:1673-8411/CN:45-1356/P]

卷:
第40卷
期数:
2019年01期
页码:
38-41
栏目:
天气气候
出版日期:
2019-04-05

文章信息/Info

Title:
Analysis on the characteristics and climatic causes of the persistent low temperature and snow freezing process in Guangxi
作者:
朱秋宇1 何慧1 周秀华1 唐熠2
1. 广西壮族自治区气候中心, 南宁 530022;
2. 桂林市气象局, 广西 桂林 541001
Author(s):
Zhu Qiuyu1 He Hui1 Zhou Xiuhua1 Tang Yi2
1. Guangxi Climate Center, Nanning Guangxi 530022;
2. Guilin Meteorological Bureau, Guilin Guangxi 541001
关键词:
持续性低温雨雪冰冻过程特征气候成因
Keywords:
persistencelow temperature and freezing rain weathercharacteristicsclimatic causes
分类号:
P468
摘要:
应用广西境内国家气象站逐日降水量、气温资料,定义了区域持续性低温雨雪冰冻过程。利用NCEP/NCAR逐日再分析等资料,使用合成分析等方法,研究了广西持续性低温雨雪冰冻过程的特征和气候成因。结果表明:(1)广西持续性低温雨雪冰冻过程在1980s之前平均出现次数为4次·10a-1,过程平均日数为40d·10a-1,而在1990s之后平均出现次数为2次·10a-1,过程平均日数为23.7d·10a-1。(2)持续性低温雨雪冰冻过程期间,亚洲大陆中低纬度地区冬季气温整体偏冷,500hPa位势高度距平场在亚洲50° N以北地区为正距平,以南为负距平,有大型稳定的长波斜脊横槽活动,华南上空由低层向高层有暖平流。
Abstract:
The regional persistent processes of low temperature and freezing rain weather is defined by using the daily precipitation and temperature data of the national meteorological station in Guangxi. Using NCEP/NCAR daily reanalysis data and synthetic analysis method, the characteristics and climatic causes of persistent low temperature and snow freezing process in Guangxi were studied.The results show that(1) the persistent processfrequency of low temperature and freezing rain weather in Guangxi were 4 times/10a before 1980s, and the average days of a process was 40d/10a, after 1990s, the frequency was 2 times/10a, and the average days was 23.7d/10a. (2) During the period of persistent low temperature and freezing rain, the winter air temperature in the middle and low latitudes of the Asian continent is generally cold. In the north of 50°N Asia, the 500hPa geopotential height anomaly field is positive while the south is negative. Beside large and stable long-wave oblique ridgesand transverse troughs, from the lower to the upper level, there are warm advections over South China.

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备注/Memo

备注/Memo:
收稿日期:2018-12-17。
基金项目:国家自然科学基金项目(41565005)、广西自然科学基金项目(2015GXNSFAA139243)、广西科学研究与技术开发计划项目(桂科攻1598071-14)和广西气象局延伸期气候预测创新团队项目共同资助。
作者简介:朱秋宇(1991-),女,广西贵港人,助理工程师,从事气候分析与预测研究,E-mail:koo-fax1991@.163.com。
通讯作者:何慧(1967-),女,广西兴业人,正研级高工,从事气候分析与预测研究,E-mail
更新日期/Last Update: 1900-01-01