[1]杨明鑫,林振敏,曾小团,等.广西夏季昼夜降水特征及其差异成因分析[J].气象研究与应用,2024,45(03):57-62.[doi:10.19849/j.cnki.CN45-1356/P.2024.3.08]
　YANG Mingxin,LIN Zhenmin,ZENG Xiaotuan,et al.Characteristics of summer diurnal precipitation and the causes of its differences in Guangxi[J].Journal of Meteorological Research and Application,2024,45(03):57-62.[doi:10.19849/j.cnki.CN45-1356/P.2024.3.08]
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广西夏季昼夜降水特征及其差异成因分析()
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气象研究与应用[ISSN:1673-8411/CN:45-1356/P]

卷:
第45卷
期数:
2024年03期
页码:
57-62
栏目:
研究论文
出版日期:
2024-09-15

文章信息/Info

Title:
Characteristics of summer diurnal precipitation and the causes of its differences in Guangxi
作者:
杨明鑫;  林振敏;  曾小团;  梁依玲;  梁存桂;  周亦靖
广西壮族自治区气象台, 南宁 530022
Author(s):
YANG Mingxin;  LIN Zhenmin;  ZENG Xiaotuan;  LIANG Yiling;  LIANG Cungui;  ZHOU Yijing
Guangxi Meteorological Observatory, Nanning 530022, China
关键词:
昼夜降水; 降雨日数; 降雨强度; 空间差异
Keywords:
diurnal precipitation; precipitation days; precipitation intensity; spatial variation
分类号:
P426.6
DOI:
10.19849/j.cnki.CN45-1356/P.2024.3.08
文献标志码:
10.19849/j.cnki.CN45-1356/P.2024.3.08
摘要:
利用广西89个国家气象站1979—2022年逐日降水观测数据，分别从昼、夜不同量级的降水量、降水日数的空间分布以及对总降水量的贡献率等方面，对广西昼夜降水变化及其差异特征进行研究，并利用再分析资料对导致广西降水昼夜差异的成因进行探究。结果表明：（1）在降水量和降水日数上，广西沿海地区昼夜均偏多，其余地区日间呈“桂南多，桂北少”，夜间呈“桂南少，桂北多”分布特征，且在不同量级降水中均有体现。（2）广西地区日间降水量对总降水量的贡献率高于夜间，但暴雨量级的贡献率则是夜间大于日间。（3）暴雨量级的夜间降水强度大于日间，且呈显著增大趋势（0.72 mm·a-1）。（4）夜间更强的偏南风、上升运动以及水汽辐合，利于桂北降水产生。（5）广西地区水汽主要以由南至北的经向输送为主，且夜间水汽输送强于日间。
Abstract:
Based on the observed daily precipitation data from 89 meteorological stations in Guangxi from 1979 to 2022, this study systematically investigates the diurnal precipitation variations and their differences in Guangxi in terms of the amount of precipitation of different magnitudes during both daytime and nighttime, the spatial distribution of the numbers of precipitation days, and the contribution rate to the total precipitation, and uses the reanalysis data to investigate the causes of the diurnal differences in precipitation in Guangxi. The results show that: (1) for precipitation and the number of precipitation days, the coastal areas of Guangxi have a higher amount of precipitation during both day and night. Apart from the coastal areas, the precipitation during daytime exhibits a pattern of“more precipitation in southern Guangxi and less in northern Guangxi”, while in nighttime shows a distribution of“less precipitation in southern Guangxi and more in northern Guangxi”. Moreover, this distribution pattern is found in the different levels of precipitation intensity. (2) Daytime precipitation contributes more significantly to the total precipitation in Guangxi than at night. However, for rainstorms, but the contribution of heavy rainfall is greater at night than during the daytime. (3) For rainstorms, the precipitation intensity at nighttime is greater than that in the daytime, with a significant increasing trend (0.72 mm·a-1). (4) The stronger southerly winds, upward motion, and moisture convergence during nighttime in Guangxi are conducive to the generation of precipitation in the northern areas of Guangxi. (5) The primary moisture transport in Guangxi mainly transports in the meridional direction from south to north, with stronger water vapour transport at night than during the day.

参考文献/References:

[1] 张养才，叶一舫.中国亚热带西部山区夜雨特征的农业气候学研究[J].地理科学，1994（1）:30-37，99.
[2] 白松竹，李博渊，黄晓华. 阿勒泰地区暖季昼夜降水气候特征[J].沙漠与绿洲象，2015，9（1）:45-51.
[3] IMAOKA K，SPENCER R W. Diurnal variation of precipitation over the tropical oceans observed by TRMM/TMI combined with SSM/I[J]. Journal of climate. 2000，13（23）: 4149-4158.
[4] MAPES B E，WARNER T T，XU M，et al. Diurnal patterns of rainfall in northwestern South America. Part I: Observations and context[J]. Monthly Weather Review. 2003，131（5）: 799-812.
[5] 邓海军，郭斌，曹永强，等.1961—2016年中国昼夜降水变化的时空格局[J]. 地理研究，2020，39（10）:2415-2426.
[6] 黄明策. 广西暴雨时空分布特征[J]. 广西气象，2006（3）:9-13.
[7] 何立，黄小燕，赵金彪，等.广西区域夏季中尺度对流系统时空分布特征[J]. 气象研究与应用，2016，37（1）:6-9，130.
[8] 陈炯，郑永光，张小玲，等.中国暖季短时强降水分布和日变化特征及其与中尺度对流系统日变化关系分析[J].气象学报，2013，71（3）:367-382.
[9] DU Y，CHEN Y L，ZHANG Q. Numerical simulations of the boundary layer jet off the southeastern coast of China[J]. Monthly Weather Review. 2015，143（4）: 1212-1231.
[10] DU Y，ROTUNNO R. Diurnal cycle of rainfall and winds near the south coast of China[J]. Journal of the Atmospheric Sciences. 2018，75（6）: 2065-2082.
[11] 韩云环，马柱国，杨庆，等. 增暖背景下新疆昼夜降水的变化特征[J].气候与环境研究，2014，19（6）:763-772.
[12] SHI F，HAO Z，SHAO Q. The analysis of water vapor budget and its future change in the Yellow Huai Hai region of China[J]. Journal of Geophysical Research: Atmospheres. 2014，119（18）: 10702-10719.
[13] 卢姝，许东蓓，严小杰，等.西北半干旱区一次盛夏暴雨水汽追踪分析[J].自然灾害学报，2021，30（5）:122-134.
[14] 覃皓，农孟松，邱滋，等.2022年广西“龙舟水”暖区暴雨中低空急流的日变化机制[J].气象研究与应用，2023， 44（1）:20-25.

备注/Memo

备注/Memo:
收稿日期:2024-1-20。
基金项目:广西自然科学基金项目（2022GXNSFAA035482）、广西气象科研计划项目（桂气科 2024QN03、桂气科 2023ZL01、桂气科2020QN03）、广西气象科研计划创新平台专项（BNCO-S202304）
作者简介:杨明鑫(1995-),助理工程师,主要从事天气、气候机理诊断分析。E-mail:827445384@qq.com
通讯作者:林振敏,正高级工程师,主要从事数值天气预报及天气预报技术开发。E-mail:gxnnzml@163.com
更新日期/Last Update: 2024-09-15