| 佛山市前汛期旱涝及其环流异常特征 |
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| 引用本文： | 黄先香,炎利军,施能.佛山市前汛期旱涝及其环流异常特征[J].广东气象,2007,29(3):15-18. |
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| 作者姓名： | 黄先香 炎利军 施能 |
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| 作者单位： | 1. 佛山市气象局,广东佛山,528000
2. 南京信息工程大学气象学院,江苏南京,210044 |
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| 基金项目： | 广东省气象局课题“佛山市前汛期旱涝影响因子和预报方法”(2006C04)资助 |
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| 摘 要： | 基于佛山市降水量和NCEP/NCAR再分析资料,采用二维风场差异的显著性检验方法等,分析了佛山市前汛期降水异常特征及旱、涝年水平风场和垂直经圈环流的差异。结果表明,佛山市前汛期降水量存在多时间尺度振荡,降水量的气候变化趋势不明显。旱、涝年热带低纬度的南海中北部及西太平洋地区的850 hPa风场存在显著差异,影响前汛期旱涝的关键区是副高的西北侧和南侧。分析还表明,旱、涝年经圈环流差异显著,北半球风场显著区位于南海区域和华南地区,层次集中在大气低层和中层。
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| 关 键 词： | 天气学 环流异常 前汛期降水异常 旱涝年 佛山市 |
| 文章编号： | 1007-6190（2007）03-0015-04 |
| 收稿时间： | 2007-05-29 |
| 修稿时间： | 2007年5月29日 |
Drought and Flood Events during Early Flood Season in Foshan with Analysis on the Circulation Anomaly |
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| HUANG Xian-xiang,YAN Li-jun,SHI Neng.Drought and Flood Events during Early Flood Season in Foshan with Analysis on the Circulation Anomaly[J].Journal of Guangdong Meteorology,2007,29(3):15-18. |
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| Authors: | HUANG Xian-xiang YAN Li-jun SHI Neng |
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| Abstract: | Based on precipitation data from Foshan observatory and the NCEP/NCAR reanalysis data,with methods like significance test of two dimensional wind field difference,the precipitation anomalies during early flood season in Foshan were analyzed as well as the horizontal wind fields and the vertical meridional circulation in drought/flood years respectively.Results show that multiple temporal scale oscillations are found in the precipitation time series during early flood season in Foshan yet with no evident climate change;the wind fields at 850hPa over tropical areas of central and northern part of South China Sea and the west Pacific Ocean in drought years are quite different from those in flood years.The key areas for drought/flood events in early flood season are northwest and south flank of subtropical high.Besides,vertical meridional circulations are also found to be significantly different between flood and drought years.The significant areas of wind fields in northern hemisphere are South China Sea and South China at middle and lower levels. |
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| Keywords: | synoptics circulation anomaly precipitation anomaly in early flood season flood/drought years Foshan City |
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