[1]覃卫坚,李耀先,廖雪萍.MJO活动对广西6月阶段性降水的影响研究1[J].气象研究与应用,2015,36(01):25-30.
　QIN Wei-jian,Li Yao-xian,LIAO Xue-ping.Impact of the Madden-Julian Oscillation activity on the phase precipitation in Guangxi[J].Journal of Meteorological Research and Application,2015,36(01):25-30.
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MJO活动对广西6月阶段性降水的影响研究1()
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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01期
页码:
25-30
栏目:
天气气候
出版日期:
2015-12-20

文章信息/Info

Title:
Impact of the Madden-Julian Oscillation activity on the phase precipitation in Guangxi
作者:
覃卫坚1;  李耀先2;  廖雪萍2
1 广西壮族自治区气候中心, 广西南宁 530022;
2 广西壮族自治区气象局, 广西南宁 530022
Author(s):
QIN Wei-jian1;  Li Yao-xian2;  LIAO Xue-ping2
1. Guangxi Climate Center, Nanning Guangxi 530022;
2. Guangxi Meteorological Service, Nanning Guangxi 530022
关键词:
热带季节内振荡(MJO); 副热带高压; 哈德莱环流; 广西
Keywords:
Madden-Julian Oscillation (MJO); Subtropical Anticyclone; Hadley; Guangxi
分类号:
P46
摘要:
使用1961~2013年广西80个气象观测站的日降水资料和NOAA OLR、NCEP/NCAR风场、高度场再分析资料。结果表明:当MJO第10位相时广西降水偏多,第1位相时偏少,第2位相时偏多,第3位相时大部偏少的周期性分布特征。原因可能为副热带高压随着MJO向东移动而减弱东移,而且影响着中高纬度地区的波列分布和转播,当MJO对流位于第10、2位相时,形成的槽脊位置有利冷空气南下影响广西,使降水发生;在MJO对流所处位相向东移动过程中,当位于印度洋西部时孟加拉湾水汽输送到达广西最强,随着逐渐向东减弱,当位于第2位相以后,广西上空水汽输送来源转为南海地区。从不同位相来看,当MJO对流位相距离广西稍远时,MJO不同位相时哈德莱上升支的主要区别在上升气流高度略有不同和高空的强上升气流区分布范围不同。
Abstract:
Based on the daily precipitation data, NOAA OLR data and NCEP/NCAR monthly reanalysis data during 1961-2013, The results show that:there is a periodic distribution that the more rainfall in Guangxi when the MJO convection center is located in phase 10, and less rainfall in phase 1, and more in phase 2, and less in phase 3. The dynamical mechanism of that may be the moving eastward of MJO convection center leads to the subtropical high shift eastward and to be weakened, and also affects the distribution and broadcast of the wave in middle and high latitudes, when MJO convection center is located in phase 10, 2, the trough and ridge position are favorable of the cold air southward and the precipitation occurred in Guangxi. When MJO convection center move eastward to India Ocean and is located over the western Bay of Bengal, the strongest water vapor transport to Guangxi. The water vapor from South China Sea transport to Guangxi when MJO convection center move eastward and is located in phase 2. The slightly difference of the height and the altitude of the strong updraft of Hadley updraft when the MJO convection center far from Guangxi.

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备注/Memo

备注/Memo:
收稿日期:2014-12-15。
基金项目:广西自然科学基金资助(2013GXNSFBB053010);广西自然科学基金资助(2013GXNSFAA019273)共同资助
作者简介:覃卫坚(1971-),男,广西人,博士研究生,高级工程师,主要从事天气气候动力学研究,(E-mail) qinweijian2008@126.com
更新日期/Last Update: 1900-01-01